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refactor memory mapped file into backend storage

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This commit is contained in:
Chris Lu
2019-11-09 00:10:59 -08:00
parent c5c1d83d91
commit 85f8649320
10 changed files with 124 additions and 122 deletions
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6
weed/storage/volume_loading.go
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@@ -25,13 +25,13 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
var e error
fileName := v.FileName()
alreadyHasSuperBlock := false
var dataFile *os.File
// open dat file
if exists, canRead, canWrite, modifiedTime, fileSize := checkFile(fileName + ".dat"); exists {
if !canRead {
return fmt.Errorf("cannot read Volume Data file %s.dat", fileName)
}
var dataFile *os.File
if canWrite {
dataFile, e = os.OpenFile(fileName+".dat", os.O_RDWR|os.O_CREATE, 0644)
} else {
@@ -43,14 +43,14 @@ func (v *Volume) load(alsoLoadIndex bool, createDatIfMissing bool, needleMapKind
if fileSize >= _SuperBlockSize {
alreadyHasSuperBlock = true
}
v.DataBackend = backend.NewDiskFile(dataFile)
} else {
if createDatIfMissing {
dataFile, e = createVolumeFile(fileName+".dat", preallocate, v.MemoryMapMaxSizeMb)
v.DataBackend, e = createVolumeFile(fileName+".dat", preallocate, v.MemoryMapMaxSizeMb)
} else {
return fmt.Errorf("Volume Data file %s.dat does not exist.", fileName)
}
}
v.DataBackend = backend.NewDiskFile(dataFile)
if e != nil {
if !os.IsPermission(e) {