oyd
/
minio
6
1
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Avoid ticker timer to simplify disk usage (#6101)

Browse Source 
This PR simplifies the code to avoid tracking
any running usage events. This PR also brings
in an upper threshold of upto 1 minute suspend
the usage function after which the usage would
proceed without waiting any longer.
master
Harshavardhana 6 years ago committed by kannappanr
parent 805186ab97
commit de251483d1
2 changed files with 30 additions and 51 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 40
      cmd/fs-v1.go
  2. 37
      cmd/posix.go

40
cmd/fs-v1.go
Unescape View File

@ -45,8 +45,6 @@ var defaultEtag = "00000000000000000000000000000000-1"
type FSObjects struct {
// Disk usage metrics
totalUsed uint64 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
// Disk usage running routine
usageRunning int32 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
// Path to be exported over S3 API.
fsPath string
@ -183,13 +181,14 @@ func (fs *FSObjects) Shutdown(ctx context.Context) error {
// diskUsage returns du information for the posix path, in a continuous routine.
func (fs *FSObjects) diskUsage(doneCh chan struct{}) {
ticker := time.NewTicker(globalUsageCheckInterval)
defer ticker.Stop()
usageFn := func(ctx context.Context, entry string) error {
if globalHTTPServer != nil {
// Wait at max 1 minute for an inprogress request
// before proceeding to count the usage.
waitCount := 60
// Any requests in progress, delay the usage.
for globalHTTPServer.GetRequestCount() > 0 {
for globalHTTPServer.GetRequestCount() > 0 && waitCount > 0 {
waitCount--
time.Sleep(1 * time.Second)
}
}
@ -213,34 +212,26 @@ func (fs *FSObjects) diskUsage(doneCh chan struct{}) {
return nil
}
// Check if disk usage routine is running, if yes then return.
if atomic.LoadInt32(&fs.usageRunning) == 1 {
return
}
atomic.StoreInt32(&fs.usageRunning, 1)
defer atomic.StoreInt32(&fs.usageRunning, 0)
if err := getDiskUsage(context.Background(), fs.fsPath, usageFn); err != nil {
// Return this routine upon errWalkAbort, continue for any other error on purpose
// so that we can start the routine freshly in another 12 hours.
if err := getDiskUsage(context.Background(), fs.fsPath, usageFn); err == errWalkAbort {
return
}
atomic.StoreInt32(&fs.usageRunning, 0)
for {
select {
case <-doneCh:
return
case <-ticker.C:
// Check if disk usage routine is running, if yes let it finish.
if atomic.LoadInt32(&fs.usageRunning) == 1 {
continue
}
atomic.StoreInt32(&fs.usageRunning, 1)
case <-time.After(globalUsageCheckInterval):
var usage uint64
usageFn = func(ctx context.Context, entry string) error {
if globalHTTPServer != nil {
// Wait at max 1 minute for an inprogress request
// before proceeding to count the usage.
waitCount := 60
// Any requests in progress, delay the usage.
for globalHTTPServer.GetRequestCount() > 0 {
for globalHTTPServer.GetRequestCount() > 0 && waitCount > 0 {
waitCount--
time.Sleep(1 * time.Second)
}
}
@ -260,11 +251,8 @@ func (fs *FSObjects) diskUsage(doneCh chan struct{}) {
}
if err := getDiskUsage(context.Background(), fs.fsPath, usageFn); err != nil {
atomic.StoreInt32(&fs.usageRunning, 0)
continue
}
atomic.StoreInt32(&fs.usageRunning, 0)
atomic.StoreUint64(&fs.totalUsed, usage)
}
}

37
cmd/posix.go
Unescape View File

@ -62,8 +62,6 @@ func isValidVolname(volname string) bool {
type posix struct {
// Disk usage metrics
totalUsed uint64 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
// Disk usage running routine
usageRunning int32 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
ioErrCount int32 // ref: https://golang.org/pkg/sync/atomic/#pkg-note-BUG
diskPath string
@ -347,8 +345,12 @@ func (s *posix) diskUsage(doneCh chan struct{}) {
usageFn := func(ctx context.Context, entry string) error {
if globalHTTPServer != nil {
// Wait at max 1 minute for an inprogress request
// before proceeding to count the usage.
waitCount := 60
// Any requests in progress, delay the usage.
for globalHTTPServer.GetRequestCount() > 0 {
for globalHTTPServer.GetRequestCount() > 0 && waitCount > 0 {
waitCount--
time.Sleep(1 * time.Second)
}
}
@ -368,17 +370,11 @@ func (s *posix) diskUsage(doneCh chan struct{}) {
}
}
// Check if disk usage routine is running, if yes then return.
if atomic.LoadInt32(&s.usageRunning) == 1 {
// Return this routine upon errWalkAbort, continue for any other error on purpose
// so that we can start the routine freshly in another 12 hours.
if err := getDiskUsage(context.Background(), s.diskPath, usageFn); err == errWalkAbort {
return
}
atomic.StoreInt32(&s.usageRunning, 1)
defer atomic.StoreInt32(&s.usageRunning, 0)
if err := getDiskUsage(context.Background(), s.diskPath, usageFn); err != nil {
return
}
atomic.StoreInt32(&s.usageRunning, 0)
for {
select {
@ -386,19 +382,16 @@ func (s *posix) diskUsage(doneCh chan struct{}) {
return
case <-doneCh:
return
case <-ticker.C:
// Check if disk usage routine is running, if yes let it
// finish, before starting a new one.
if atomic.LoadInt32(&s.usageRunning) == 1 {
continue
}
atomic.StoreInt32(&s.usageRunning, 1)
case <-time.After(globalUsageCheckInterval):
var usage uint64
usageFn = func(ctx context.Context, entry string) error {
if globalHTTPServer != nil {
// Wait at max 1 minute for an inprogress request
// before proceeding to count the usage.
waitCount := 60
// Any requests in progress, delay the usage.
for globalHTTPServer.GetRequestCount() > 0 {
for globalHTTPServer.GetRequestCount() > 0 && waitCount > 0 {
waitCount--
time.Sleep(1 * time.Second)
}
}
@ -417,11 +410,9 @@ func (s *posix) diskUsage(doneCh chan struct{}) {
}
if err := getDiskUsage(context.Background(), s.diskPath, usageFn); err != nil {
atomic.StoreInt32(&s.usageRunning, 0)
continue
}
atomic.StoreInt32(&s.usageRunning, 0)
atomic.StoreUint64(&s.totalUsed, usage)
}
}

Write Preview
Loading…
Cancel
Save