bitcask-mirror/cmd/bitcask/merge.go
James Mills 51bac21c0a
Improves Merge() operation by also pruning old key/value pairs (#29)
* Added new API Stats() and Prune()

* Improved Merge() logic to also prune old key/values and actually reclaim disk space

* Added backward compat for the old Merge() function

* Refactor indexing of keys to items (hints)

* Remove redundant TestOpenMerge

* Add unit test for Stats()

* Improve TestMerge()
2019-07-27 07:52:25 +10:00

46 lines
898 B
Go

package main
import (
"os"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/prologic/bitcask"
)
var mergeCmd = &cobra.Command{
Use: "merge",
Aliases: []string{"clean", "compact", "defrag"},
Short: "Merges the Datafiles in the Database",
Long: `This merges all non-active Datafiles in the Database and
compacts the data stored on disk. Old values are removed as well as deleted
keys.`,
Args: cobra.ExactArgs(0),
Run: func(cmd *cobra.Command, args []string) {
path := viper.GetString("path")
os.Exit(merge(path))
},
}
func init() {
RootCmd.AddCommand(mergeCmd)
}
func merge(path string) int {
db, err := bitcask.Open(path)
if err != nil {
log.WithError(err).Error("error opening database")
return 1
}
if err = db.Merge(); err != nil {
log.WithError(err).Error("error merging database")
return 1
}
return 0
}