forked from cockroachdb/cockroach
-
Notifications
You must be signed in to change notification settings - Fork 0
/
in_mem.go
45 lines (39 loc) · 1.54 KB
/
in_mem.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
// Copyright 2015 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package engine
import "github.com/cockroachdb/cockroach/pkg/roachpb"
// InMem wraps RocksDB and configures it for in-memory only storage.
type InMem struct {
*RocksDB
}
// NewInMem allocates and returns a new, opened InMem engine.
// The caller must call the engine's Close method when the engine is no longer
// needed.
//
// FIXME(tschottdorf): make the signature similar to NewRocksDB (require a cfg).
func NewInMem(attrs roachpb.Attributes, cacheSize int64) InMem {
cache := NewRocksDBCache(cacheSize)
// The cache starts out with a refcount of one, and creating the engine
// from it adds another refcount, at which point we release one of them.
defer cache.Release()
// TODO(bdarnell): The hard-coded 512 MiB is wrong; see
// https://github.com/cockroachdb/cockroach/issues/16750
rdb, err := newMemRocksDB(attrs, cache, 512<<20 /* MaxSizeBytes: 512 MiB */)
if err != nil {
panic(err)
}
db := InMem{RocksDB: rdb}
return db
}
var _ Engine = InMem{}