[#82] services/tree: Save last synchronized height in a persistent storage

Remember the last synchronized height and use it after service restart.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
This commit is contained in:
Evgenii Stratonikov 2023-01-25 15:44:44 +03:00
parent 92e44a45e5
commit f6f5611375
3 changed files with 18 additions and 26 deletions

View file

@ -13,6 +13,7 @@ Changelog for FrostFS Node
- Reload config for pprof and metrics on SIGHUP in `neofs-node` (#1868)
- Multiple configs support (#44)
- Parameters `nns-name` and `nns-zone` for command `frostfs-cli container create` (#37)
- Tree service now saves the last synchronization height which persists across restarts (#82)
### Changed
- Change `frostfs_node_engine_container_size` to counting sizes of logical objects

View file

@ -31,10 +31,8 @@ type Service struct {
syncChan chan struct{}
syncPool *ants.Pool
// cnrMap maps contrainer and tree ID to the minimum height which was fetched from _each_ client.
// This allows us to better handle split-brain scenario, because we always synchronize
// from the last seen height. The inner map is read-only and should not be modified in-place.
cnrMap map[cidSDK.ID]map[string]uint64
// cnrMap contains existing (used) container IDs.
cnrMap map[cidSDK.ID]struct{}
// cnrMapMtx protects cnrMap
cnrMapMtx sync.Mutex
}
@ -63,7 +61,7 @@ func New(opts ...Option) *Service {
s.replicateLocalCh = make(chan applyOp)
s.replicationTasks = make(chan replicationTask, s.replicatorWorkerCount)
s.containerCache.init(s.containerCacheSize)
s.cnrMap = make(map[cidSDK.ID]map[string]uint64)
s.cnrMap = make(map[cidSDK.ID]struct{})
s.syncChan = make(chan struct{})
s.syncPool, _ = ants.NewPool(defaultSyncWorkerCount)

View file

@ -86,31 +86,24 @@ func (s *Service) synchronizeAllTrees(ctx context.Context, cid cid.ID) error {
return fmt.Errorf("could not fetch tree ID list: %w", outErr)
}
s.cnrMapMtx.Lock()
oldStatus := s.cnrMap[cid]
s.cnrMapMtx.Unlock()
syncStatus := map[string]uint64{}
for i := range treesToSync {
syncStatus[treesToSync[i]] = 0
}
for tid := range oldStatus {
if _, ok := syncStatus[tid]; ok {
syncStatus[tid] = oldStatus[tid]
}
}
for _, tid := range treesToSync {
h := s.synchronizeTree(ctx, d, syncStatus[tid], tid, nodes)
if syncStatus[tid] < h {
syncStatus[tid] = h
h, err := s.forest.TreeLastSyncHeight(d.CID, tid)
if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
s.log.Warn("could not get last synchronized height for a tree",
zap.Stringer("cid", d.CID),
zap.String("tree", tid))
continue
}
newHeight := s.synchronizeTree(ctx, d, h, tid, nodes)
if h < newHeight {
if err := s.forest.TreeUpdateLastSyncHeight(d.CID, tid, newHeight); err != nil {
s.log.Warn("could not update last synchronized height for a tree",
zap.Stringer("cid", d.CID),
zap.String("tree", tid))
}
}
}
s.cnrMapMtx.Lock()
s.cnrMap[cid] = syncStatus
s.cnrMapMtx.Unlock()
return nil
}