43 lines
920 B
Go
43 lines
920 B
Go
package flatfs
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import (
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"os"
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"runtime"
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)
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// don't block more than 16 threads on sync opearation
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// 16 should be able to sataurate most RAIDs
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// in case of two used disks per write (RAID 1, 5) and queue depth of 2,
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// 16 concurrent Sync calls should be able to saturate 16 HDDs RAID
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//TODO: benchmark it out, maybe provide tweak parmeter
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const SyncThreadsMax = 16
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var syncSemaphore chan struct{} = make(chan struct{}, SyncThreadsMax)
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func syncDir(dir string) error {
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if runtime.GOOS == "windows" {
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// dir sync on windows doesn't work: https://git.io/vPnCI
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return nil
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}
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dirF, err := os.Open(dir)
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if err != nil {
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return err
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}
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defer dirF.Close()
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syncSemaphore <- struct{}{}
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defer func() { <-syncSemaphore }()
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if err := dirF.Sync(); err != nil {
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return err
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}
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return nil
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}
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func syncFile(file *os.File) error {
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syncSemaphore <- struct{}{}
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defer func() { <-syncSemaphore }()
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return file.Sync()
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}
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