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008399a6e0
Create checkpoints from a sequence of WAL segments while filtering out obsolete data. The checkpoint format is again a sequence of WAL segments, which allows us to reuse the serialization format and implementation. Signed-off-by: Fabian Reinartz <freinartz@google.com>
49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
// Package fileutil provides utility methods used when dealing with the filesystem in tsdb.
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// It is largely copied from github.com/coreos/etcd/pkg/fileutil to avoid the
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// dependency chain it brings with it.
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// Please check github.com/coreos/etcd for licensing information.
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package fileutil
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import (
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"os"
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"path/filepath"
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"sort"
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)
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// ReadDir returns the filenames in the given directory in sorted order.
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func ReadDir(dirpath string) ([]string, error) {
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dir, err := os.Open(dirpath)
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if err != nil {
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return nil, err
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}
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defer dir.Close()
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names, err := dir.Readdirnames(-1)
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if err != nil {
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return nil, err
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}
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sort.Strings(names)
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return names, nil
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}
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// Rename safely renames a file.
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func Rename(from, to string) error {
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if err := os.RemoveAll(to); err != nil {
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return err
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}
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if err := os.Rename(from, to); err != nil {
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return err
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}
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// Directory was renamed; sync parent dir to persist rename.
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pdir, err := OpenDir(filepath.Dir(to))
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if err != nil {
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return err
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}
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if err = Fsync(pdir); err != nil {
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pdir.Close()
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return err
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}
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return pdir.Close()
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}
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