seaweedfs/go/weed/fix.go

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package main
import (
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"code.google.com/p/weed-fs/go/storage"
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"log"
"os"
"path"
"strconv"
)
func init() {
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cmdFix.Run = runFix // break init cycle
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cmdFix.IsDebug = cmdFix.Flag.Bool("debug", false, "enable debug mode")
}
var cmdFix = &Command{
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UsageLine: "fix -dir=/tmp -volumeId=234",
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Short: "run weed tool fix on index file if corrupted",
Long: `Fix runs the WeedFS fix command to re-create the index .idx file.
`,
}
var (
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fixVolumePath = cmdFix.Flag.String("dir", "/tmp", "data directory to store files")
fixVolumeId = cmdFix.Flag.Int("volumeId", -1, "a volume id. The volume should already exist in the dir. The volume index file should not exist.")
)
func runFix(cmd *Command, args []string) bool {
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if *fixVolumeId == -1 {
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return false
}
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fileName := strconv.Itoa(*fixVolumeId)
indexFile, err := os.OpenFile(path.Join(*fixVolumePath, fileName+".idx"), os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
log.Fatalf("Create Volume Index [ERROR] %s\n", err)
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}
defer indexFile.Close()
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nm := storage.NewNeedleMap(indexFile)
defer nm.Close()
vid := storage.VolumeId(*fixVolumeId)
err = storage.ScanVolumeFile(*fixVolumePath, vid, func(superBlock storage.SuperBlock) error {
return nil
}, func(n *storage.Needle, offset uint32) error {
debug("key", n.Id, "offset", offset, "size", n.Size, "disk_size", n.DiskSize(), "gzip", n.IsGzipped())
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if n.Size > 0 {
count, pe := nm.Put(n.Id, offset/storage.NeedlePaddingSize, n.Size)
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debug("saved", count, "with error", pe)
} else {
debug("skipping deleted file ...")
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return nm.Delete(n.Id)
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}
return nil
})
if err != nil {
log.Fatalf("Export Volume File [ERROR] %s\n", err)
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}
return true
}