TrueCloudLab/frostfs-node
20
1
Fork 27
Code Issues 100 Pull requests 4 Projects Releases 1 Activity Actions

Do not change shard mode to DEGRADED_READ_ONLY in case of no space left from blobovnicza #1166

Merged
fyrchik merged 1 commit from dstepanov-yadro/frostfs-node:fix/out_of_space_dro into master 2024-09-04 19:51:09 +00:00
Conversation 0 Commits 1 Files changed 1 +4 -1
dstepanov-yadro commented 2024-06-06 15:11:39 +00:00
Member
Copy link

Now engine doesn't change shard mode in case of no space left errors and error threshold defined.

Now engine doesn't change shard mode in case of `no space left` errors and error threshold defined.
dstepanov-yadro force-pushed fix/out_of_space_dro from 118da6a174 to e916b5765c 2024-06-06 15:13:09 +00:00 Compare
fyrchik reviewed 2024-06-06 15:20:52 +00:00
pkg/local_object_storage/blobstor/blobovniczatree/delete.go Outdated
@ -80,2 +75,4 @@
res, err = b.deleteObjectFromLevel(ctx, bPrm, p)
if err != nil {
if isErrNoSpaceLeft(err) {
return false, common.ErrNoSpace // stop iteration if no space left
fyrchik commented 2024-06-06 15:19:22 +00:00
Owner
Copy link

It is tricky: one db may have no space because it wanted to do a remap, another one can have a large freelist with already allocated memory.
If we exit prematurely, we can make it harder to free space, e.g. there would be no place to put tombstone into.

It is tricky: one db may have no space because it wanted to do a remap, another one can have a large freelist with already allocated memory. If we exit prematurely, we can make it harder to free space, e.g. there would be no place to put tombstone into.
dstepanov-yadro commented 2024-06-06 15:26:45 +00:00
Author
Member
Copy link

Not actual.

Not actual.
pkg/local_object_storage/blobstor/blobovniczatree/put.go Outdated
@ -84,3 +82,4 @@
i.B.log.Debug(logs.BlobovniczatreeCouldNotGetActiveBlobovnicza,
zap.String("error", err.Error()),
zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
} else if isErrNoSpaceLeft(err) { // stop iteration if no space left
fyrchik commented 2024-06-06 15:20:41 +00:00
Owner
Copy link

Why have you decided to add this handlers on the blobovniczatree level and not on the blobovnicza?
It seems easier to miss sth here, and in blobovnicza we can easily ensure that each Update or Batch is wrapped, for example.

Why have you decided to add this handlers on the `blobovniczatree` level and not on the `blobovnicza`? It seems easier to miss sth here, and in blobovnicza we can easily ensure that each `Update` or `Batch` is wrapped, for example.
dstepanov-yadro commented 2024-06-06 15:29:13 +00:00
Author
Member
Copy link

To stop iteration over databases as soon as possible.

To stop iteration over databases as soon as possible.
dstepanov-yadro force-pushed fix/out_of_space_dro from e916b5765c to 447741ca7f 2024-06-06 15:21:25 +00:00 Compare
dstepanov-yadro force-pushed fix/out_of_space_dro from 447741ca7f to c5c22c632e 2024-06-06 15:23:36 +00:00 Compare
dstepanov-yadro force-pushed fix/out_of_space_dro from c5c22c632e to f991f4d4fb 2024-06-06 15:25:39 +00:00 Compare
dstepanov-yadro changed title from Do not change shard mode to DEGRADED_READ_ONLY in case of no space left from blobovnicza to WIP: Do not change shard mode to DEGRADED_READ_ONLY in case of no space left from blobovnicza 2024-06-06 15:32:35 +00:00
dstepanov-yadro force-pushed fix/out_of_space_dro from f991f4d4fb to 84b8e0bd41 2024-06-06 16:02:44 +00:00 Compare
dstepanov-yadro reviewed 2024-06-06 16:04:10 +00:00
pkg/local_object_storage/blobovnicza/errors.go Outdated
@ -0,0 +3,4 @@
import "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
// ErrNoSpace returned if blobovnicza failed to perform an operation because of syscall.ENOSPC.
var ErrNoSpace = logicerr.New("no space left on device with blobovnicza")
dstepanov-yadro commented 2024-06-06 16:04:09 +00:00
Author
Member
Copy link

To not to use blobstor's ErrNoSpace: blobstor should depend on blobovnicza, not vice versa.

To not to use blobstor's ErrNoSpace: blobstor should depend on blobovnicza, not vice versa.
dstepanov-yadro changed title from WIP: Do not change shard mode to DEGRADED_READ_ONLY in case of no space left from blobovnicza to Do not change shard mode to DEGRADED_READ_ONLY in case of no space left from blobovnicza 2024-06-06 16:55:07 +00:00
dstepanov-yadro requested review from storage-core-committers 2024-06-06 16:55:13 +00:00
dstepanov-yadro requested review from storage-core-developers 2024-06-06 16:55:14 +00:00
acid-ant approved these changes 2024-06-07 06:58:21 +00:00
achuprov approved these changes 2024-06-07 08:37:43 +00:00
fyrchik reviewed 2024-06-07 12:10:16 +00:00
pkg/local_object_storage/blobovnicza/put.go Outdated
@ -95,6 +97,8 @@ func (b *Blobovnicza) Put(ctx context.Context, prm PutPrm) (PutRes, error) {
})
if err == nil {
b.itemAdded(recordSize)
} else if errors.Is(err, syscall.ENOSPC) {
fyrchik commented 2024-06-07 12:10:16 +00:00
Owner
Copy link

Any modifying method can allocate new pages, even delete.

Any modifying method can allocate new pages, even delete.
dstepanov-yadro commented 2024-06-07 13:41:05 +00:00
Author
Member
Copy link

I thought about it, but have found this comment of contributor: https://github.com/etcd-io/bbolt/issues/288#issuecomment-919971605

Anyway, ok, I will fix it.

I thought about it, but have found this comment of contributor: https://github.com/etcd-io/bbolt/issues/288#issuecomment-919971605 Anyway, ok, I will fix it.
dstepanov-yadro commented 2024-06-07 14:16:28 +00:00
Author
Member
Copy link

Done

Done
fyrchik commented 2024-06-10 07:54:26 +00:00
Owner
Copy link

The comment has different context (shrinking the DB), we already have experienced situations where deletions lead to db remap leading to a deadlock (with the write-cache)

The comment has different context (shrinking the DB), we already have experienced situations where deletions lead to db remap leading to a deadlock (with the write-cache)
fyrchik marked this conversation as resolved
dstepanov-yadro force-pushed fix/out_of_space_dro from 84b8e0bd41 to 815e87df74 2024-06-07 14:12:15 +00:00 Compare
dstepanov-yadro force-pushed fix/out_of_space_dro from 815e87df74 to 6cf512e574 2024-06-07 14:15:59 +00:00 Compare
fyrchik reviewed 2024-06-10 07:57:09 +00:00
pkg/local_object_storage/blobstor/blobovniczatree/put.go
@ -110,2 +111,3 @@
}
if errors.Is(err, blobovnicza.ErrNoSpace) {
i.AllFull = true
fyrchik commented 2024-06-10 07:57:08 +00:00
Owner
Copy link

Again, do we exit if we received this error from at least 1 blobovnicza? Until we have vacuum I think it is not worth having this optimization, as others blobovniczas may still have free pages.

Again, do we exit if we received this error from at least 1 blobovnicza? Until we have vacuum I think it is not worth having this optimization, as others blobovniczas may still have free pages.
dstepanov-yadro commented 2024-06-10 08:23:45 +00:00
Author
Member
Copy link

No, blobstor will try all databases:

	i.AllFull = false <------- here AllFull resets

	_, err = active.Blobovnicza().Put(ctx, i.PutPrm)
	if err != nil {
		if !isLogical(err) {
			i.B.reportError(logs.BlobovniczatreeCouldNotPutObjectToActiveBlobovnicza, err)
		} else {
			i.B.log.Debug(logs.BlobovniczatreeCouldNotPutObjectToActiveBlobovnicza,
				zap.String("path", active.SystemPath()),
				zap.String("error", err.Error()),
				zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
		}

		if errors.Is(err, blobovnicza.ErrNoSpace) {
			i.AllFull = true
No, blobstor will try all databases: ``` i.AllFull = false <------- here AllFull resets _, err = active.Blobovnicza().Put(ctx, i.PutPrm) if err != nil { if !isLogical(err) { i.B.reportError(logs.BlobovniczatreeCouldNotPutObjectToActiveBlobovnicza, err) } else { i.B.log.Debug(logs.BlobovniczatreeCouldNotPutObjectToActiveBlobovnicza, zap.String("path", active.SystemPath()), zap.String("error", err.Error()), zap.String("trace_id", tracingPkg.GetTraceID(ctx))) } if errors.Is(err, blobovnicza.ErrNoSpace) { i.AllFull = true ```
fyrchik commented 2024-06-10 10:07:26 +00:00
Owner
Copy link

I don't understand, why do we need this change in this PR? Is something wrong without it?

I don't understand, why do we need this change in this PR? Is something wrong without it?
dstepanov-yadro commented 2024-06-10 10:38:04 +00:00
Author
Member
Copy link

Without this change blobovnicza tree will return non logical error:

Line 64 in a0c5882
return common.PutRes{}, errPutFailed


So shard will increase error counter.

Without this change blobovnicza tree will return non logical error: https://git.frostfs.info/TrueCloudLab/frostfs-node/src/commit/a0c588263bd550bb131a8ed2f1a5ad318811018c/pkg/local_object_storage/blobstor/blobovniczatree/put.go#L64 So shard will increase error counter.
fyrchik commented 2024-06-10 11:28:25 +00:00
Owner
Copy link

Hm, but why iterateDeepest return non-nil error?

Hm, but why `iterateDeepest` return non-nil error?
dstepanov-yadro commented 2024-06-10 11:43:09 +00:00
Author
Member
Copy link

By design.

By design.
fyrchik approved these changes 2024-06-10 11:49:15 +00:00
fyrchik merged commit 6cf512e574 into master 2024-06-10 11:51:33 +00:00
Sign in to join this conversation.
Reviewers
No reviewers
acid-ant
achuprov
fyrchik
Labels
Clear labels   
P0

Highest

  
P1

High

  
P2

Medium

  
P3

Low

  
badger

Badger DB related issues

  
frostfs-adm

   
frostfs-cli

   
frostfs-ir

   
frostfs-lens

   
frostfs-node

   
good first issue

Good for newcomers

  
triage
  
Infrastructure

Infrastructure, Automation, CI/CD or DevOps related stuff

  
blocked

The issue or PR is blocked by something

  
bug

Something is not working

  
config

Configuration format update or breaking change

  
discussion

Talking about something in order to reach a decision or to exchange ideas

  
documentation

Documentation related

  
duplicate

This issue or pull request already exists

  
enhancement

New feature

  
go

Language features adoption

  
help wanted

Extra attention is needed

  
internal

   
invalid

Something is wrong

  
kludge

This is a kludge and we know it

  
observability

Related to metrics, tracing and logs

  
perfomance

Perfomance related

  
question

More information is needed

  
refactoring

Refactoring

  
wontfix

This won't be fixed

No labels
P0
P1
P2
P3
badger
frostfs-adm
frostfs-cli
frostfs-ir
frostfs-lens
frostfs-node
good first issue
triage
Infrastructure
blocked
bug
config
discussion
documentation
duplicate
enhancement
go
help wanted
internal
invalid
kludge
observability
perfomance
question
refactoring
wontfix
Milestone
Clear milestone
No items
No milestone
Projects
Clear projects
No items
No project
Assignees
Clear assignees
No assignees
4 participants
Notifications
Due date
The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set.

Reference: TrueCloudLab/frostfs-node#1166
No description provided.
Delete branch "dstepanov-yadro/frostfs-node:fix/out_of_space_dro"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?