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…#24547) (#24548) Under certain circumstances, the retention service can fail to delete shards from the store in a timely manner. When the shard groups are pruned based on age, this leaves orphaned shard files on the disk. The retention service will then not attempt to remove the obsolete shard files because the meta store does not know about them. This can cause excessive disk space usage for some users. This corrects that by requiring shards files be deleted before they can be removed from the meta store. fixes: #24529 (cherry picked from commit 7bd3f89) closes #24545 Co-authored-by: Geoffrey Wossum <gwossum@influxdata.com> (cherry picked from commit 0dc48b1) closes #24546
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package helpers | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "golang.org/x/exp/slices" | ||
|
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| "github.com/influxdata/influxdb/v2/v1/services/meta" | ||
| ) | ||
|
|
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| // DataDeleteShardGroup deletes the shard group specified by database, policy, and id from targetData. | ||
| // It does this by setting the shard group's DeletedAt time to now. We have to reimplement DeleteShardGroup | ||
| // instead of using data's so that the DeletedAt time will be deterministic. We are also not testing | ||
| // the functionality of DeleteShardGroup. We are testing if DeleteShardGroup gets called correctly. | ||
| func DataDeleteShardGroup(targetData *meta.Data, now time.Time, database, policy string, id uint64) error { | ||
| rpi, err := targetData.RetentionPolicy(database, policy) | ||
|
|
||
| if err != nil { | ||
| return err | ||
| } else if rpi == nil { | ||
| return meta.ErrRetentionPolicyNotFound | ||
| } | ||
|
|
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| // Find shard group by ID and set its deletion timestamp. | ||
| for i := range rpi.ShardGroups { | ||
| if rpi.ShardGroups[i].ID == id { | ||
| rpi.ShardGroups[i].DeletedAt = now | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| return meta.ErrShardGroupNotFound | ||
| } | ||
|
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| // DataNukeShardGroup unconditionally removes the shard group identified by targetDB, targetRP, and targetID | ||
| // from targetData. There's no meta.Data method to directly remove a shard group, only to mark it deleted and | ||
| // then prune it. We can't use the functionality we're testing to generate the expected result. | ||
| func DataNukeShardGroup(targetData *meta.Data, targetDB, targetRP string, targetID uint64) error { | ||
| rpi, err := targetData.RetentionPolicy(targetDB, targetRP) | ||
| if err != nil { | ||
| return err | ||
| } else if rpi == nil { | ||
| return fmt.Errorf("no retention policy found for %q, %q, %d", targetDB, targetRP, targetID) | ||
| } | ||
| isTargetShardGroup := func(sgi meta.ShardGroupInfo) bool { | ||
| return sgi.ID == targetID | ||
| } | ||
| if !slices.ContainsFunc(rpi.ShardGroups, isTargetShardGroup) { | ||
| return fmt.Errorf("shard not found for %q, %q, %d", targetDB, targetRP, targetID) | ||
| } | ||
| rpi.ShardGroups = slices.DeleteFunc(rpi.ShardGroups, isTargetShardGroup) | ||
| return nil | ||
| } |
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