mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-11-28 05:15:00 +08:00
99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
package shell
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import (
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"context"
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"flag"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/util"
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"io"
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"strings"
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)
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func init() {
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Commands = append(Commands, &commandRemoteUncache{})
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}
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type commandRemoteUncache struct {
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}
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func (c *commandRemoteUncache) Name() string {
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return "remote.uncache"
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}
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func (c *commandRemoteUncache) Help() string {
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return `keep the metadata but remote cache the file content for mounted directories or files
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remote.uncache -dir=xxx
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remote.uncache -dir=xxx/some/sub/dir
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`
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}
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func (c *commandRemoteUncache) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
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remoteMountCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
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dir := remoteMountCommand.String("dir", "", "a directory in filer")
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if err = remoteMountCommand.Parse(args); err != nil {
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return nil
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}
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mappings, listErr := filer.ReadMountMappings(commandEnv.option.GrpcDialOption, commandEnv.option.FilerAddress)
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if listErr != nil {
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return listErr
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}
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if *dir == "" {
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jsonPrintln(writer, mappings)
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fmt.Fprintln(writer, "need to specify '-dir' option")
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return nil
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}
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var localMountedDir string
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for k, _ := range mappings.Mappings {
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if strings.HasPrefix(*dir, k) {
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localMountedDir = k
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}
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}
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if localMountedDir == "" {
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jsonPrintln(writer, mappings)
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fmt.Fprintf(writer, "%s is not mounted\n", *dir)
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return nil
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}
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// pull content from remote
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if err = c.uncacheContentData(commandEnv, writer, util.FullPath(*dir)); err != nil {
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return fmt.Errorf("cache content data: %v", err)
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}
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return nil
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}
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func (c *commandRemoteUncache) uncacheContentData(commandEnv *CommandEnv, writer io.Writer, dirToCache util.FullPath) error {
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return recursivelyTraverseDirectory(commandEnv, dirToCache, func(dir util.FullPath, entry *filer_pb.Entry) bool {
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if !mayHaveCachedToLocal(entry) {
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return true // true means recursive traversal should continue
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}
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entry.RemoteEntry.LocalMtime = 0
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println(dir, entry.Name)
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err := commandEnv.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
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_, updateErr := client.UpdateEntry(context.Background(), &filer_pb.UpdateEntryRequest{
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Directory: string(dir),
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Entry: entry,
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})
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return updateErr
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})
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if err != nil {
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fmt.Fprintf(writer, "uncache %+v: %v\n", dir.Child(entry.Name), err)
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return false
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}
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return true
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})
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}
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