func NewLeveldb() *Leveldb {
env := levigo.NewDefaultEnv()
options := levigo.NewOptions()
// options.SetComparator(cmp)
options.SetCreateIfMissing(true)
options.SetErrorIfExists(false)
// options.SetCache(cache)
options.SetEnv(env)
options.SetInfoLog(nil)
options.SetWriteBufferSize(8 << 20)
options.SetParanoidChecks(true)
options.SetMaxOpenFiles(2000)
options.SetBlockSize(4 * 1024)
options.SetBlockRestartInterval(8)
options.SetCompression(levigo.SnappyCompression)
roptions := levigo.NewReadOptions()
roptions.SetVerifyChecksums(true)
roptions.SetFillCache(false)
woptions := levigo.NewWriteOptions()
woptions.SetSync(true)
return &Leveldb{env,
options,
roptions,
woptions,
nil}
}
func NewLeveldb(name string) *Leveldb {
options := levigo.NewOptions()
// options.SetComparator(cmp)
options.SetCreateIfMissing(true)
options.SetErrorIfExists(false)
// set env
env := levigo.NewDefaultEnv()
options.SetEnv(env)
// set cache
cache := levigo.NewLRUCache(16 << 20)
options.SetCache(cache)
options.SetInfoLog(nil)
options.SetParanoidChecks(false)
options.SetWriteBufferSize(128 << 20)
options.SetMaxOpenFiles(2000)
options.SetBlockSize(4 * 1024)
options.SetBlockRestartInterval(16)
options.SetCompression(levigo.SnappyCompression)
// set filter
filter := levigo.NewBloomFilter(10)
options.SetFilterPolicy(filter)
roptions := levigo.NewReadOptions()
roptions.SetVerifyChecksums(false)
roptions.SetFillCache(true)
woptions := levigo.NewWriteOptions()
// set sync false
woptions.SetSync(false)
db := &Leveldb{env,
options,
roptions,
woptions,
nil}
if err := db.Open(name); err != nil {
Panic("open db failed, err:%v", err)
} else {
Info("open db succeed, dbname:%v", name)
}
return db
}