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ddl/ingest: add mutex to disk root #41029

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merged 2 commits into from
Feb 3, 2023
Merged

ddl/ingest: add mutex to disk root #41029

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23afa34
ddl/ingest: add mutex to disk root
tangenta Feb 3, 2023
02a8031
fix typo
tangenta Feb 3, 2023
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21 changes: 17 additions & 4 deletions ddl/ingest/disk_root.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,8 @@
package ingest

import (
"sync"

lcom "github.com/pingcap/tidb/br/pkg/lightning/common"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/util/logutil"
Expand All @@ -37,6 +39,7 @@ type diskRootImpl struct {
currentUsage uint64
maxQuota uint64
bcCtx *backendCtxManager
mu sync.RWMutex
}

// NewDiskRootImpl creates a new DiskRoot.
Expand All @@ -49,22 +52,32 @@ func NewDiskRootImpl(path string, bcCtx *backendCtxManager) DiskRoot {

// CurrentUsage implements DiskRoot interface.
func (d *diskRootImpl) CurrentUsage() uint64 {
return d.currentUsage
d.mu.RLock()
usage := d.currentUsage
d.mu.RUnlock()
return usage
}

// MaxQuota implements DiskRoot interface.
func (d *diskRootImpl) MaxQuota() uint64 {
return d.maxQuota
d.mu.RLock()
quota := d.maxQuota
d.mu.RUnlock()
return quota
}

// UpdateUsageAndQuota implements DiskRoot interface.
func (d *diskRootImpl) UpdateUsageAndQuota() error {
d.currentUsage = d.bcCtx.TotalDiskUsage()
totalDiskUsage := d.bcCtx.TotalDiskUsage()
sz, err := lcom.GetStorageSize(d.path)
if err != nil {
logutil.BgLogger().Error(LitErrGetStorageQuota, zap.Error(err))
return err
}
d.maxQuota = mathutil.Min(variable.DDLDiskQuota.Load(), uint64(capacityThreshold*float64(sz.Capacity)))
maxQuota := mathutil.Min(variable.DDLDiskQuota.Load(), uint64(capacityThreshold*float64(sz.Capacity)))
d.mu.Lock()
d.currentUsage = totalDiskUsage
d.maxQuota = maxQuota
d.mu.Unlock()
return nil
}