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aman bansalandGitHub
dbca3723b3
* changing badger module path to v3 * running go mod tidy * updating metric keys + proto package
90 lines
2.6 KiB
Go
90 lines
2.6 KiB
Go
/*
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* Copyright 2018 Dgraph Labs, Inc. and Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"fmt"
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"math"
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"github.com/dgraph-io/badger/v3"
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"github.com/dgraph-io/badger/v3/options"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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var flattenCmd = &cobra.Command{
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Use: "flatten",
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Short: "Flatten the LSM tree.",
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Long: `
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This command would compact all the LSM tables into one level.
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`,
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RunE: flatten,
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}
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var fo = struct {
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keyPath string
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numWorkers int
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numVersions int
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compressionType uint32
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}{}
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func init() {
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RootCmd.AddCommand(flattenCmd)
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flattenCmd.Flags().IntVarP(&fo.numWorkers, "num-workers", "w", 1,
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"Number of concurrent compactors to run. More compactors would use more"+
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" server resources to potentially achieve faster compactions.")
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flattenCmd.Flags().IntVarP(&fo.numVersions, "num_versions", "", 0,
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"Option to configure the maximum number of versions per key. "+
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"Values <= 0 will be considered to have the max number of versions.")
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flattenCmd.Flags().StringVar(&fo.keyPath, "encryption-key-file", "",
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"Path of the encryption key file.")
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flattenCmd.Flags().Uint32VarP(&fo.compressionType, "compression", "", 1,
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"Option to configure the compression type in output DB. "+
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"0 to disable, 1 for Snappy, and 2 for ZSTD.")
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}
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func flatten(cmd *cobra.Command, args []string) error {
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if fo.numVersions <= 0 {
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// Keep all versions.
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fo.numVersions = math.MaxInt32
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}
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encKey, err := getKey(fo.keyPath)
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if err != nil {
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return err
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}
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if fo.compressionType < 0 || fo.compressionType > 2 {
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return errors.Errorf(
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"compression value must be one of 0 (disabled), 1 (Snappy), or 2 (ZSTD)")
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}
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opt := badger.DefaultOptions(sstDir).
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WithValueDir(vlogDir).
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WithNumVersionsToKeep(fo.numVersions).
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WithNumCompactors(0).
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WithBlockCacheSize(100 << 20).
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WithIndexCacheSize(200 << 20).
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WithCompression(options.CompressionType(fo.compressionType)).
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WithEncryptionKey(encKey)
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fmt.Printf("Opening badger with options = %+v\n", opt)
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db, err := badger.Open(opt)
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if err != nil {
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return err
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}
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defer db.Close()
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return db.Flatten(fo.numWorkers)
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}
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