implement the dry run ha parameter

file-store/src/lib.rs

@@ -56,7 +56,7 @@ impl FileStore {
         let file = NamedTempFile::new_in(&self.path)?;
         let uuid = Uuid::new_v4();
         let path = self.path.join(uuid.to_string());
-        let update_file = File { file, path };
+        let update_file = File { dry: false, file, path };
 
         Ok((uuid, update_file))
     }
@@ -67,7 +67,7 @@ impl FileStore {
         let file = NamedTempFile::new_in(&self.path)?;
         let uuid = Uuid::from_u128(uuid);
         let path = self.path.join(uuid.to_string());
-        let update_file = File { file, path };
+        let update_file = File { dry: false, file, path };
 
         Ok((uuid, update_file))
     }
@@ -135,13 +135,29 @@ impl FileStore {
 }
 
 pub struct File {
+    dry: bool,
     path: PathBuf,
     file: NamedTempFile,
 }
 
 impl File {
+    pub fn dry_file() -> Result<Self> {
+        #[cfg(target_family = "unix")]
+        let path = PathBuf::from_str("/dev/null").unwrap();
+        #[cfg(target_family = "windows")]
+        let path = PathBuf::from_str("\\Device\\Null").unwrap();
+
+        Ok(Self {
+            dry: true,
+            path: path.clone(),
+            file: tempfile::Builder::new().make(|_| std::fs::File::create(path.clone()))?,
+        })
+    }
+
     pub fn persist(self) -> Result<()> {
-        self.file.persist(&self.path)?;
+        if !self.dry {
+            self.file.persist(&self.path)?;
+        }
         Ok(())
     }
 }

index-scheduler/src/lib.rs

@@ -1001,7 +1001,12 @@ impl IndexScheduler {
     /// Register a new task in the scheduler.
     ///
     /// If it fails and data was associated with the task, it tries to delete the associated data.
-    pub fn register(&self, kind: KindWithContent, task_id: Option<TaskId>) -> Result<Task> {
+    pub fn register(
+        &self,
+        kind: KindWithContent,
+        task_id: Option<TaskId>,
+        dry_run: bool,
+    ) -> Result<Task> {
         let mut wtxn = self.env.write_txn()?;
 
         // if the task doesn't delete anything and 50% of the task queue is full, we must refuse to enqueue the incomming task
@@ -1037,6 +1042,11 @@ impl IndexScheduler {
         // (that it does not contain duplicate indexes).
         check_index_swap_validity(&task)?;
 
+        // At this point the task is going to be registered and no further checks will be done
+        if dry_run {
+            return Ok(task);
+        }
+
         // Get rid of the mutability.
         let task = task;
 
@@ -1101,8 +1111,12 @@ impl IndexScheduler {
     /// The returned file and uuid can be used to associate
     /// some data to a task. The file will be kept until
     /// the task has been fully processed.
-    pub fn create_update_file(&self) -> Result<(Uuid, file_store::File)> {
-        Ok(self.file_store.new_update()?)
+    pub fn create_update_file(&self, dry_run: bool) -> Result<(Uuid, file_store::File)> {
+        if dry_run {
+            Ok((Uuid::nil(), file_store::File::dry_file()?))
+        } else {
+            Ok(self.file_store.new_update()?)
+        }
     }
 
     #[cfg(test)]
@@ -1413,6 +1427,7 @@ impl IndexScheduler {
                 tasks: to_delete,
             },
             None,
+            false,
         )?;
 
         Ok(())
@@ -1534,7 +1549,7 @@ impl<'a> Dump<'a> {
     ) -> Result<Task> {
         let content_uuid = match content_file {
             Some(content_file) if task.status == Status::Enqueued => {
-                let (uuid, mut file) = self.index_scheduler.create_update_file()?;
+                let (uuid, mut file) = self.index_scheduler.create_update_file(false)?;
                 let mut builder = DocumentsBatchBuilder::new(file.as_file_mut());
                 for doc in content_file {
                     builder.append_json_object(&doc?)?;
@@ -2038,7 +2053,7 @@ mod tests {
 
         for (idx, kind) in kinds.into_iter().enumerate() {
             let k = kind.as_kind();
-            let task = index_scheduler.register(kind, None).unwrap();
+            let task = index_scheduler.register(kind, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
 
             assert_eq!(task.uid, idx as u32);
@@ -2053,18 +2068,18 @@ mod tests {
     fn insert_task_while_another_task_is_processing() {
         let (index_scheduler, mut handle) = IndexScheduler::test(true, vec![]);
 
-        index_scheduler.register(index_creation_task("index_a", "id"), None).unwrap();
+        index_scheduler.register(index_creation_task("index_a", "id"), None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
 
         handle.advance_till([Start, BatchCreated]);
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "after_batch_creation");
 
         // while the task is processing can we register another task?
-        index_scheduler.register(index_creation_task("index_b", "id"), None).unwrap();
+        index_scheduler.register(index_creation_task("index_b", "id"), None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_second_task");
 
         index_scheduler
-            .register(KindWithContent::IndexDeletion { index_uid: S("index_a") }, None)
+            .register(KindWithContent::IndexDeletion { index_uid: S("index_a") }, None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_third_task");
     }
@@ -2073,7 +2088,7 @@ mod tests {
     fn test_task_is_processing() {
         let (index_scheduler, mut handle) = IndexScheduler::test(true, vec![]);
 
-        index_scheduler.register(index_creation_task("index_a", "id"), None).unwrap();
+        index_scheduler.register(index_creation_task("index_a", "id"), None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_a_task");
 
         handle.advance_till([Start, BatchCreated]);
@@ -2090,6 +2105,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggos"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -2098,12 +2114,13 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("cattos"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_second_task");
 
         index_scheduler
-            .register(KindWithContent::IndexDeletion { index_uid: S("doggos") }, None)
+            .register(KindWithContent::IndexDeletion { index_uid: S("doggos") }, None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_third_task");
 
@@ -2125,22 +2142,23 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggos"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
 
         index_scheduler
-            .register(KindWithContent::DocumentClear { index_uid: S("doggos") }, None)
+            .register(KindWithContent::DocumentClear { index_uid: S("doggos") }, None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_second_task");
 
         index_scheduler
-            .register(KindWithContent::DocumentClear { index_uid: S("doggos") }, None)
+            .register(KindWithContent::DocumentClear { index_uid: S("doggos") }, None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_third_task");
 
         index_scheduler
-            .register(KindWithContent::DocumentClear { index_uid: S("doggos") }, None)
+            .register(KindWithContent::DocumentClear { index_uid: S("doggos") }, None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_fourth_task");
 
@@ -2173,7 +2191,7 @@ mod tests {
         ];
 
         for task in to_enqueue {
-            let _ = index_scheduler.register(task, None).unwrap();
+            let _ = index_scheduler.register(task, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
         }
 
@@ -2188,6 +2206,7 @@ mod tests {
                     tasks: RoaringBitmap::from_iter([0, 1]),
                 },
                 None,
+                false,
             )
             .unwrap();
         // again, no progress made at all, but one more task is registered
@@ -2222,7 +2241,7 @@ mod tests {
         ];
 
         for task in to_enqueue {
-            let _ = index_scheduler.register(task, None).unwrap();
+            let _ = index_scheduler.register(task, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
         }
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "initial_tasks_enqueued");
@@ -2239,6 +2258,7 @@ mod tests {
                     tasks: RoaringBitmap::from_iter([0]),
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "after_registering_the_task_deletion");
@@ -2262,7 +2282,7 @@ mod tests {
         ];
 
         for task in to_enqueue {
-            let _ = index_scheduler.register(task, None).unwrap();
+            let _ = index_scheduler.register(task, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
         }
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "initial_tasks_enqueued");
@@ -2280,6 +2300,7 @@ mod tests {
                         tasks: RoaringBitmap::from_iter([0]),
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -2313,6 +2334,7 @@ mod tests {
                     allow_index_creation: true,
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "after_register");
@@ -2338,6 +2360,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggos"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -2356,12 +2379,13 @@ mod tests {
                     allow_index_creation: true,
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_second_task");
 
         index_scheduler
-            .register(KindWithContent::IndexDeletion { index_uid: S("doggos") }, None)
+            .register(KindWithContent::IndexDeletion { index_uid: S("doggos") }, None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_third_task");
 
@@ -2395,6 +2419,7 @@ mod tests {
                     allow_index_creation: true,
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -2405,6 +2430,7 @@ mod tests {
                     documents_ids: vec![S("1"), S("2")],
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_second_task");
@@ -2434,6 +2460,7 @@ mod tests {
                     documents_ids: vec![S("1"), S("2")],
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -2458,6 +2485,7 @@ mod tests {
                     allow_index_creation: true,
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_second_task");
@@ -2495,6 +2523,7 @@ mod tests {
                         primary_key: None,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -2502,7 +2531,11 @@ mod tests {
 
         for name in index_names {
             index_scheduler
-                .register(KindWithContent::DocumentClear { index_uid: name.to_string() }, None)
+                .register(
+                    KindWithContent::DocumentClear { index_uid: name.to_string() },
+                    None,
+                    false,
+                )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
         }
@@ -2527,7 +2560,7 @@ mod tests {
         ];
 
         for task in to_enqueue {
-            let _ = index_scheduler.register(task, None).unwrap();
+            let _ = index_scheduler.register(task, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
         }
 
@@ -2549,6 +2582,7 @@ mod tests {
                     ],
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "first_swap_registered");
@@ -2558,6 +2592,7 @@ mod tests {
                     swaps: vec![IndexSwap { indexes: ("a".to_owned(), "c".to_owned()) }],
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "two_swaps_registered");
@@ -2568,7 +2603,9 @@ mod tests {
         handle.advance_one_successful_batch();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "second_swap_processed");
 
-        index_scheduler.register(KindWithContent::IndexSwap { swaps: vec![] }, None).unwrap();
+        index_scheduler
+            .register(KindWithContent::IndexSwap { swaps: vec![] }, None, false)
+            .unwrap();
         handle.advance_one_successful_batch();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "third_empty_swap_processed");
     }
@@ -2585,7 +2622,7 @@ mod tests {
         ];
 
         for task in to_enqueue {
-            let _ = index_scheduler.register(task, None).unwrap();
+            let _ = index_scheduler.register(task, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
         }
         handle.advance_n_successful_batches(4);
@@ -2603,6 +2640,7 @@ mod tests {
                     ],
                 },
                 None,
+                false,
             )
             .unwrap_err();
         snapshot!(format!("{err}"), @"Indexes must be declared only once during a swap. `a`, `b` were specified several times.");
@@ -2621,6 +2659,7 @@ mod tests {
                     ],
                 },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_failed_batch();
@@ -2652,10 +2691,11 @@ mod tests {
                     allow_index_creation: true,
                 },
                 None,
+                false,
             )
             .unwrap();
         index_scheduler
-            .register(KindWithContent::IndexDeletion { index_uid: S("doggos") }, None)
+            .register(KindWithContent::IndexDeletion { index_uid: S("doggos") }, None, false)
             .unwrap();
 
         snapshot!(snapshot_index_scheduler(&index_scheduler));
@@ -2680,7 +2720,7 @@ mod tests {
             },
         ];
         for task in to_enqueue {
-            let _ = index_scheduler.register(task, None).unwrap();
+            let _ = index_scheduler.register(task, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
         }
 
@@ -2697,7 +2737,7 @@ mod tests {
         file0.persist().unwrap();
 
         let _ = index_scheduler
-            .register(replace_document_import_task("catto", None, 0, documents_count0), None)
+            .register(replace_document_import_task("catto", None, 0, documents_count0), None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
 
@@ -2711,6 +2751,7 @@ mod tests {
                     tasks: RoaringBitmap::from_iter([0]),
                 },
                 None,
+                false,
             )
             .unwrap();
 
@@ -2726,7 +2767,7 @@ mod tests {
         file0.persist().unwrap();
 
         let _ = index_scheduler
-            .register(replace_document_import_task("catto", None, 0, documents_count0), None)
+            .register(replace_document_import_task("catto", None, 0, documents_count0), None, false)
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
 
@@ -2740,6 +2781,7 @@ mod tests {
                     tasks: RoaringBitmap::from_iter([0]),
                 },
                 None,
+                false,
             )
             .unwrap();
 
@@ -2770,7 +2812,7 @@ mod tests {
             replace_document_import_task("wolfo", None, 2, documents_count2),
         ];
         for task in to_enqueue {
-            let _ = index_scheduler.register(task, None).unwrap();
+            let _ = index_scheduler.register(task, None, false).unwrap();
             index_scheduler.assert_internally_consistent();
         }
         handle.advance_one_successful_batch();
@@ -2784,6 +2826,7 @@ mod tests {
                     tasks: RoaringBitmap::from_iter([0, 1, 2]),
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "processing_second_task_cancel_enqueued");
@@ -2822,6 +2865,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -2872,6 +2916,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -2924,6 +2969,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -2977,6 +3023,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3031,6 +3078,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3076,13 +3124,13 @@ mod tests {
         let (index_scheduler, mut handle) = IndexScheduler::test(true, vec![]);
 
         let kind = index_creation_task("doggo", "bone");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
         let kind = index_creation_task("whalo", "plankton");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_second_task");
         let kind = index_creation_task("catto", "his_own_vomit");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_third_task");
 
         handle.advance_n_successful_batches(3);
@@ -3140,11 +3188,11 @@ mod tests {
             IndexScheduler::test(true, vec![(3, FailureLocation::InsideProcessBatch)]);
 
         let kind = index_creation_task("catto", "mouse");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         let kind = index_creation_task("doggo", "sheep");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         let kind = index_creation_task("whalo", "fish");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
 
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "start");
 
@@ -3363,17 +3411,17 @@ mod tests {
             IndexScheduler::test(true, vec![(3, FailureLocation::InsideProcessBatch)]);
 
         let kind = index_creation_task("catto", "mouse");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         let kind = index_creation_task("doggo", "sheep");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         let kind = KindWithContent::IndexSwap {
             swaps: vec![IndexSwap { indexes: ("catto".to_owned(), "doggo".to_owned()) }],
         };
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         let kind = KindWithContent::IndexSwap {
             swaps: vec![IndexSwap { indexes: ("catto".to_owned(), "whalo".to_owned()) }],
         };
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
 
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "start");
 
@@ -3449,20 +3497,20 @@ mod tests {
             IndexScheduler::test(true, vec![(3, FailureLocation::InsideProcessBatch)]);
 
         let kind = index_creation_task("catto", "mouse");
-        let _ = index_scheduler.register(kind, None).unwrap();
+        let _ = index_scheduler.register(kind, None, false).unwrap();
         let kind = index_creation_task("doggo", "sheep");
-        let _ = index_scheduler.register(kind, None).unwrap();
+        let _ = index_scheduler.register(kind, None, false).unwrap();
         let kind = KindWithContent::IndexSwap {
             swaps: vec![IndexSwap { indexes: ("catto".to_owned(), "doggo".to_owned()) }],
         };
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
 
         handle.advance_n_successful_batches(1);
         let kind = KindWithContent::TaskCancelation {
             query: "test_query".to_string(),
             tasks: [0, 1, 2, 3].into_iter().collect(),
         };
-        let task_cancelation = index_scheduler.register(kind, None).unwrap();
+        let task_cancelation = index_scheduler.register(kind, None, false).unwrap();
         handle.advance_n_successful_batches(1);
 
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "start");
@@ -3497,7 +3545,7 @@ mod tests {
 
         let kind = index_creation_task("catto", "mouse");
 
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "after_register");
 
         handle.advance_one_failed_batch();
@@ -3532,6 +3580,7 @@ mod tests {
                     allow_index_creation: true,
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -3573,6 +3622,7 @@ mod tests {
                     allow_index_creation: true,
                 },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -3632,6 +3682,7 @@ mod tests {
                         allow_index_creation: false,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3683,6 +3734,7 @@ mod tests {
                         allow_index_creation: false,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3714,6 +3766,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggos"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -3743,6 +3796,7 @@ mod tests {
                         allow_index_creation: false,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3779,6 +3833,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggos"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -3808,6 +3863,7 @@ mod tests {
                         allow_index_creation: false,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3848,6 +3904,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggos"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
@@ -3878,6 +3935,7 @@ mod tests {
                         allow_index_creation,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3934,6 +3992,7 @@ mod tests {
                         allow_index_creation,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -3989,6 +4048,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -4053,6 +4113,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -4113,6 +4174,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -4197,6 +4259,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -4283,6 +4346,7 @@ mod tests {
                         allow_index_creation: true,
                     },
                     None,
+                    false,
                 )
                 .unwrap();
             index_scheduler.assert_internally_consistent();
@@ -4337,7 +4401,7 @@ mod tests {
 
         let kind = index_creation_task("catto", "mouse");
 
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "registered_the_first_task");
 
         handle.advance_till([Start, BatchCreated, ProcessBatchFailed, AfterProcessing]);
@@ -4360,6 +4424,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_successful_batch();
@@ -4368,6 +4433,7 @@ mod tests {
             let result = index_scheduler.register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             );
             if result.is_err() {
                 break;
@@ -4381,6 +4447,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap_err();
         snapshot!(result, @"Meilisearch cannot receive write operations because the limit of the task database has been reached. Please delete tasks to continue performing write operations.");
@@ -4392,6 +4459,7 @@ mod tests {
             .register(
                 KindWithContent::TaskDeletion { query: S("test"), tasks: RoaringBitmap::new() },
                 None,
+                false,
             )
             .unwrap_err();
         snapshot!(result, @"Meilisearch cannot receive write operations because the limit of the task database has been reached. Please delete tasks to continue performing write operations.");
@@ -4403,6 +4471,7 @@ mod tests {
             .register(
                 KindWithContent::TaskDeletion { query: S("test"), tasks: (0..100).collect() },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_successful_batch();
@@ -4412,6 +4481,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_failed_batch();
@@ -4428,6 +4498,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_successful_batch();
@@ -4436,6 +4507,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_failed_batch();
@@ -4446,12 +4518,14 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         index_scheduler
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
 
@@ -4507,6 +4581,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_successful_batch();
@@ -4515,6 +4590,7 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         handle.advance_one_failed_batch();
@@ -4525,12 +4601,14 @@ mod tests {
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
         index_scheduler
             .register(
                 KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None },
                 None,
+                false,
             )
             .unwrap();
 
@@ -4555,11 +4633,11 @@ mod tests {
         let (index_scheduler, mut handle) = IndexScheduler::test(true, vec![]);
 
         let kind = index_creation_task("catto", "mouse");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         let kind = index_creation_task("doggo", "sheep");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
         let kind = index_creation_task("whalo", "fish");
-        let _task = index_scheduler.register(kind, None).unwrap();
+        let _task = index_scheduler.register(kind, None, false).unwrap();
 
         snapshot!(json_string!(index_scheduler.get_stats().unwrap()), @r###"
         {
@@ -4709,11 +4787,11 @@ mod tests {
             query: "cancel dump".to_owned(),
             tasks: RoaringBitmap::from_iter([0]),
         };
-        let _ = index_scheduler.register(dump_creation, None).unwrap();
+        let _ = index_scheduler.register(dump_creation, None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "after_dump_register");
         handle.advance_till([Start, BatchCreated, InsideProcessBatch]);
 
-        let _ = index_scheduler.register(dump_cancellation, None).unwrap();
+        let _ = index_scheduler.register(dump_cancellation, None, false).unwrap();
         snapshot!(snapshot_index_scheduler(&index_scheduler), name: "cancel_registered");
 
         snapshot!(format!("{:?}", handle.advance()), @"AbortedIndexation");
@@ -4727,15 +4805,86 @@ mod tests {
         let (index_scheduler, _handle) = IndexScheduler::test(true, vec![]);
 
         let kind = KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None };
-        let task = index_scheduler.register(kind, None).unwrap();
+        let task = index_scheduler.register(kind, None, false).unwrap();
         snapshot!(task.uid, @"0");
 
         let kind = KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None };
-        let task = index_scheduler.register(kind, Some(12)).unwrap();
+        let task = index_scheduler.register(kind, Some(12), false).unwrap();
         snapshot!(task.uid, @"12");
 
         let kind = KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None };
-        let error = index_scheduler.register(kind, Some(5)).unwrap_err();
+        let error = index_scheduler.register(kind, Some(5), false).unwrap_err();
         snapshot!(error, @"Received bad task id: 5 should be >= to 13.");
     }
+
+    #[test]
+    fn dry_run() {
+        let (index_scheduler, _handle) = IndexScheduler::test(true, vec![]);
+
+        let kind = KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None };
+        let task = index_scheduler.register(kind, None, true).unwrap();
+        snapshot!(task.uid, @"0");
+        snapshot!(snapshot_index_scheduler(&index_scheduler), @r###"
+        ### Autobatching Enabled = true
+        ### Processing Tasks:
+        []
+        ----------------------------------------------------------------------
+        ### All Tasks:
+        ----------------------------------------------------------------------
+        ### Status:
+        ----------------------------------------------------------------------
+        ### Kind:
+        ----------------------------------------------------------------------
+        ### Index Tasks:
+        ----------------------------------------------------------------------
+        ### Index Mapper:
+
+        ----------------------------------------------------------------------
+        ### Canceled By:
+
+        ----------------------------------------------------------------------
+        ### Enqueued At:
+        ----------------------------------------------------------------------
+        ### Started At:
+        ----------------------------------------------------------------------
+        ### Finished At:
+        ----------------------------------------------------------------------
+        ### File Store:
+
+        ----------------------------------------------------------------------
+        "###);
+
+        let kind = KindWithContent::IndexCreation { index_uid: S("doggo"), primary_key: None };
+        let task = index_scheduler.register(kind, Some(12), true).unwrap();
+        snapshot!(task.uid, @"12");
+        snapshot!(snapshot_index_scheduler(&index_scheduler), @r###"
+        ### Autobatching Enabled = true
+        ### Processing Tasks:
+        []
+        ----------------------------------------------------------------------
+        ### All Tasks:
+        ----------------------------------------------------------------------
+        ### Status:
+        ----------------------------------------------------------------------
+        ### Kind:
+        ----------------------------------------------------------------------
+        ### Index Tasks:
+        ----------------------------------------------------------------------
+        ### Index Mapper:
+
+        ----------------------------------------------------------------------
+        ### Canceled By:
+
+        ----------------------------------------------------------------------
+        ### Enqueued At:
+        ----------------------------------------------------------------------
+        ### Started At:
+        ----------------------------------------------------------------------
+        ### Finished At:
+        ----------------------------------------------------------------------
+        ### File Store:
+
+        ----------------------------------------------------------------------
+        "###);
+    }
 }

meilisearch/src/lib.rs

@@ -251,7 +251,9 @@ pub fn setup_meilisearch(opt: &Opt) -> anyhow::Result<(Arc<IndexScheduler>, Arc<
             .name(String::from("register-snapshot-tasks"))
             .spawn(move || loop {
                 thread::sleep(snapshot_delay);
-                if let Err(e) = index_scheduler.register(KindWithContent::SnapshotCreation, None) {
+                if let Err(e) =
+                    index_scheduler.register(KindWithContent::SnapshotCreation, None, false)
+                {
                     error!("Error while registering snapshot: {}", e);
                 }
             })

meilisearch/src/routes/dump.rs

@@ -11,7 +11,7 @@ use crate::analytics::Analytics;
 use crate::extractors::authentication::policies::*;
 use crate::extractors::authentication::GuardedData;
 use crate::extractors::sequential_extractor::SeqHandler;
-use crate::routes::{get_task_id, SummarizedTaskView};
+use crate::routes::{get_task_id, is_dry_run, SummarizedTaskView};
 use crate::Opt;
 
 pub fn configure(cfg: &mut web::ServiceConfig) {
@@ -32,8 +32,11 @@ pub async fn create_dump(
         instance_uid: analytics.instance_uid().cloned(),
     };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Create dump");
     Ok(HttpResponse::Accepted().json(task))

meilisearch/src/routes/indexes/documents.rs

@@ -36,7 +36,9 @@ use crate::extractors::authentication::policies::*;
 use crate::extractors::authentication::GuardedData;
 use crate::extractors::payload::Payload;
 use crate::extractors::sequential_extractor::SeqHandler;
-use crate::routes::{get_task_id, PaginationView, SummarizedTaskView, PAGINATION_DEFAULT_LIMIT};
+use crate::routes::{
+    get_task_id, is_dry_run, PaginationView, SummarizedTaskView, PAGINATION_DEFAULT_LIMIT,
+};
 use crate::search::parse_filter;
 use crate::Opt;
 
@@ -133,8 +135,11 @@ pub async fn delete_document(
         documents_ids: vec![document_id],
     };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
     debug!("returns: {:?}", task);
     Ok(HttpResponse::Accepted().json(task))
 }
@@ -282,6 +287,7 @@ pub async fn replace_documents(
 
     let allow_index_creation = index_scheduler.filters().allow_index_creation(&index_uid);
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task = document_addition(
         extract_mime_type(&req)?,
         index_scheduler,
@@ -291,6 +297,7 @@ pub async fn replace_documents(
         body,
         IndexDocumentsMethod::ReplaceDocuments,
         uid,
+        dry_run,
         allow_index_creation,
     )
     .await?;
@@ -317,6 +324,7 @@ pub async fn update_documents(
 
     let allow_index_creation = index_scheduler.filters().allow_index_creation(&index_uid);
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task = document_addition(
         extract_mime_type(&req)?,
         index_scheduler,
@@ -326,6 +334,7 @@ pub async fn update_documents(
         body,
         IndexDocumentsMethod::UpdateDocuments,
         uid,
+        dry_run,
         allow_index_creation,
     )
     .await?;
@@ -344,6 +353,7 @@ async fn document_addition(
     mut body: Payload,
     method: IndexDocumentsMethod,
     task_id: Option<TaskId>,
+    dry_run: bool,
     allow_index_creation: bool,
 ) -> Result<SummarizedTaskView, MeilisearchHttpError> {
     let format = match (
@@ -376,7 +386,7 @@ async fn document_addition(
         }
     };
 
-    let (uuid, mut update_file) = index_scheduler.create_update_file()?;
+    let (uuid, mut update_file) = index_scheduler.create_update_file(dry_run)?;
 
     let temp_file = match tempfile() {
         Ok(file) => file,
@@ -460,7 +470,9 @@ async fn document_addition(
     };
 
     let scheduler = index_scheduler.clone();
-    let task = match tokio::task::spawn_blocking(move || scheduler.register(task, task_id)).await? {
+    let task = match tokio::task::spawn_blocking(move || scheduler.register(task, task_id, dry_run))
+        .await?
+    {
         Ok(task) => task,
         Err(e) => {
             index_scheduler.delete_update_file(uuid)?;
@@ -492,8 +504,11 @@ pub async fn delete_documents_batch(
     let task =
         KindWithContent::DocumentDeletion { index_uid: index_uid.to_string(), documents_ids: ids };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Delete documents by batch");
     Ok(HttpResponse::Accepted().json(task))
@@ -530,8 +545,11 @@ pub async fn delete_documents_by_filter(
     let task = KindWithContent::DocumentDeletionByFilter { index_uid, filter_expr: filter };
 
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Delete documents by filter");
     Ok(HttpResponse::Accepted().json(task))
@@ -549,8 +567,11 @@ pub async fn clear_all_documents(
 
     let task = KindWithContent::DocumentClear { index_uid: index_uid.to_string() };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Delete all documents");
     Ok(HttpResponse::Accepted().json(task))

meilisearch/src/routes/indexes/mod.rs

@@ -22,6 +22,7 @@ use crate::analytics::Analytics;
 use crate::extractors::authentication::policies::*;
 use crate::extractors::authentication::{AuthenticationError, GuardedData};
 use crate::extractors::sequential_extractor::SeqHandler;
+use crate::routes::is_dry_run;
 use crate::Opt;
 
 pub mod documents;
@@ -140,8 +141,11 @@ pub async fn create_index(
 
         let task = KindWithContent::IndexCreation { index_uid: uid.to_string(), primary_key };
         let uid = get_task_id(&req, &opt)?;
+        let dry_run = is_dry_run(&req, &opt)?;
         let task: SummarizedTaskView =
-            tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+            tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+                .await??
+                .into();
         debug!(returns = ?task, "Create index");
 
         Ok(HttpResponse::Accepted().json(task))
@@ -211,8 +215,11 @@ pub async fn update_index(
     };
 
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Update index");
     Ok(HttpResponse::Accepted().json(task))
@@ -227,8 +234,11 @@ pub async fn delete_index(
     let index_uid = IndexUid::try_from(index_uid.into_inner())?;
     let task = KindWithContent::IndexDeletion { index_uid: index_uid.into_inner() };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
     debug!(returns = ?task, "Delete index");
 
     Ok(HttpResponse::Accepted().json(task))

meilisearch/src/routes/indexes/settings.rs

@@ -15,7 +15,7 @@ use tracing::debug;
 use crate::analytics::Analytics;
 use crate::extractors::authentication::policies::*;
 use crate::extractors::authentication::GuardedData;
-use crate::routes::{get_task_id, SummarizedTaskView};
+use crate::routes::{get_task_id, is_dry_run, SummarizedTaskView};
 use crate::Opt;
 
 #[macro_export]
@@ -36,7 +36,7 @@ macro_rules! make_setting_route {
             use $crate::extractors::authentication::GuardedData;
             use $crate::extractors::sequential_extractor::SeqHandler;
             use $crate::Opt;
-            use $crate::routes::{get_task_id, SummarizedTaskView};
+            use $crate::routes::{is_dry_run, get_task_id, SummarizedTaskView};
 
             pub async fn delete(
                 index_scheduler: GuardedData<
@@ -61,8 +61,9 @@ macro_rules! make_setting_route {
                     allow_index_creation,
                 };
                 let uid = get_task_id(&req, &opt)?;
+                let dry_run = is_dry_run(&req, &opt)?;
                 let task: SummarizedTaskView =
-                    tokio::task::spawn_blocking(move || index_scheduler.register(task, uid))
+                    tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
                         .await??
                         .into();
 
@@ -112,8 +113,9 @@ macro_rules! make_setting_route {
                     allow_index_creation,
                 };
                 let uid = get_task_id(&req, &opt)?;
+                let dry_run = is_dry_run(&req, &opt)?;
                 let task: SummarizedTaskView =
-                    tokio::task::spawn_blocking(move || index_scheduler.register(task, uid))
+                    tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
                         .await??
                         .into();
 
@@ -776,8 +778,11 @@ pub async fn update_all(
         allow_index_creation,
     };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Update all settings");
     Ok(HttpResponse::Accepted().json(task))
@@ -815,8 +820,11 @@ pub async fn delete_all(
         allow_index_creation,
     };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Delete all settings");
     Ok(HttpResponse::Accepted().json(task))

meilisearch/src/routes/mod.rs

@@ -77,6 +77,25 @@ pub fn get_task_id(req: &HttpRequest, opt: &Opt) -> Result<Option<TaskId>, Respo
     Ok(task_id)
 }
 
+pub fn is_dry_run(req: &HttpRequest, opt: &Opt) -> Result<bool, ResponseError> {
+    if !opt.experimental_ha_parameters {
+        return Ok(false);
+    }
+    Ok(req
+        .headers()
+        .get("DryRun")
+        .map(|header| {
+            header.to_str().map_err(|e| {
+                ResponseError::from_msg(
+                    format!("DryRun is not a valid utf-8 string: {e}"),
+                    Code::BadRequest,
+                )
+            })
+        })
+        .transpose()?
+        .map_or(false, |s| s.to_lowercase() == "true"))
+}
+
 #[derive(Debug, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct SummarizedTaskView {

meilisearch/src/routes/snapshot.rs

@@ -10,7 +10,7 @@ use crate::analytics::Analytics;
 use crate::extractors::authentication::policies::*;
 use crate::extractors::authentication::GuardedData;
 use crate::extractors::sequential_extractor::SeqHandler;
-use crate::routes::{get_task_id, SummarizedTaskView};
+use crate::routes::{get_task_id, is_dry_run, SummarizedTaskView};
 use crate::Opt;
 
 pub fn configure(cfg: &mut web::ServiceConfig) {
@@ -27,8 +27,11 @@ pub async fn create_snapshot(
 
     let task = KindWithContent::SnapshotCreation;
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
 
     debug!(returns = ?task, "Create snapshot");
     Ok(HttpResponse::Accepted().json(task))

meilisearch/src/routes/swap_indexes.rs

@@ -10,7 +10,7 @@ use meilisearch_types::index_uid::IndexUid;
 use meilisearch_types::tasks::{IndexSwap, KindWithContent};
 use serde_json::json;
 
-use super::{get_task_id, SummarizedTaskView};
+use super::{get_task_id, is_dry_run, SummarizedTaskView};
 use crate::analytics::Analytics;
 use crate::error::MeilisearchHttpError;
 use crate::extractors::authentication::policies::*;
@@ -63,7 +63,10 @@ pub async fn swap_indexes(
 
     let task = KindWithContent::IndexSwap { swaps };
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task: SummarizedTaskView =
-        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid)).await??.into();
+        tokio::task::spawn_blocking(move || index_scheduler.register(task, uid, dry_run))
+            .await??
+            .into();
     Ok(HttpResponse::Accepted().json(task))
 }

meilisearch/src/routes/tasks.rs

@@ -18,7 +18,7 @@ use time::macros::format_description;
 use time::{Date, Duration, OffsetDateTime, Time};
 use tokio::task;
 
-use super::{get_task_id, SummarizedTaskView};
+use super::{get_task_id, is_dry_run, SummarizedTaskView};
 use crate::analytics::Analytics;
 use crate::extractors::authentication::policies::*;
 use crate::extractors::authentication::GuardedData;
@@ -200,8 +200,10 @@ async fn cancel_tasks(
         KindWithContent::TaskCancelation { query: format!("?{}", req.query_string()), tasks };
 
     let uid = get_task_id(&req, &opt)?;
+    let dry_run = is_dry_run(&req, &opt)?;
     let task =
-        task::spawn_blocking(move || index_scheduler.register(task_cancelation, uid)).await??;
+        task::spawn_blocking(move || index_scheduler.register(task_cancelation, uid, dry_run))
+            .await??;
     let task: SummarizedTaskView = task.into();
 
     Ok(HttpResponse::Ok().json(task))
@@ -248,7 +250,9 @@ async fn delete_tasks(
         KindWithContent::TaskDeletion { query: format!("?{}", req.query_string()), tasks };
 
     let uid = get_task_id(&req, &opt)?;
-    let task = task::spawn_blocking(move || index_scheduler.register(task_deletion, uid)).await??;
+    let dry_run = is_dry_run(&req, &opt)?;
+    let task = task::spawn_blocking(move || index_scheduler.register(task_deletion, uid, dry_run))
+        .await??;
     let task: SummarizedTaskView = task.into();
 
     Ok(HttpResponse::Ok().json(task))