mirror of
https://github.com/luxfi/zapdb.git
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Ibrahim JarifandGitHub
3e2ae0848a
This PR introduces in-memory mode in badger. The in-memory mode can be enabled by setting options.InMemory=true. When badger is running in in-memory mode no files are created and everything is stored in memory. On DB close, all stored data is lost. NOTE - An existing DB cannot be opened in in-memory mode. Fixes - https://github.com/dgraph-io/badger/issues/1001
83 lines
2.0 KiB
Go
83 lines
2.0 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 badger
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import (
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"fmt"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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func TestWriteBatch(t *testing.T) {
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key := func(i int) []byte {
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return []byte(fmt.Sprintf("%10d", i))
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}
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val := func(i int) []byte {
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return []byte(fmt.Sprintf("%128d", i))
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}
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test := func(t *testing.T, db *DB) {
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wb := db.NewWriteBatch()
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defer wb.Cancel()
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N, M := 50000, 1000
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start := time.Now()
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for i := 0; i < N; i++ {
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require.NoError(t, wb.Set(key(i), val(i)))
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}
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for i := 0; i < M; i++ {
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require.NoError(t, wb.Delete(key(i)))
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}
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require.NoError(t, wb.Flush())
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t.Logf("Time taken for %d writes (w/ test options): %s\n", N+M, time.Since(start))
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err := db.View(func(txn *Txn) error {
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itr := txn.NewIterator(DefaultIteratorOptions)
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defer itr.Close()
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i := M
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for itr.Rewind(); itr.Valid(); itr.Next() {
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item := itr.Item()
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require.Equal(t, string(key(i)), string(item.Key()))
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valcopy, err := item.ValueCopy(nil)
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require.NoError(t, err)
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require.Equal(t, val(i), valcopy)
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i++
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}
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require.Equal(t, N, i)
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return nil
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})
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require.NoError(t, err)
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}
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t.Run("disk mode", func(t *testing.T) {
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runBadgerTest(t, nil, func(t *testing.T, db *DB) {
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test(t, db)
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})
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})
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t.Run("InMemory mode", func(t *testing.T) {
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opt := getTestOptions("")
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opt.InMemory = true
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db, err := Open(opt)
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require.NoError(t, err)
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test(t, db)
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require.NoError(t, db.Close())
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})
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}
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