func (db *DB) initOptions(cfg *config.LevelDBConfig) {
opts := NewOptions()
opts.SetCreateIfMissing(true)
cfg.Adjust()
db.cache = NewLRUCache(cfg.CacheSize)
opts.SetCache(db.cache)
//we must use bloomfilter
db.filter = NewBloomFilter(defaultFilterBits)
opts.SetFilterPolicy(db.filter)
if !cfg.Compression {
opts.SetCompression(NoCompression)
} else {
opts.SetCompression(SnappyCompression)
}
opts.SetBlockSize(cfg.BlockSize)
opts.SetWriteBufferSize(cfg.WriteBufferSize)
opts.SetMaxOpenFiles(cfg.MaxOpenFiles)
db.opts = opts
db.readOpts = NewReadOptions()
db.writeOpts = NewWriteOptions()
db.iteratorOpts = NewReadOptions()
db.iteratorOpts.SetFillCache(false)
}
func (db *DB) initOptions(cfg *config.LevelDBConfig) {
opts := NewOptions()
blockOpts := NewBlockBasedTableOptions()
opts.SetCreateIfMissing(true)
cfg.Adjust()
db.env = NewDefaultEnv()
db.env.SetBackgroundThreads(runtime.NumCPU() * 2)
db.env.SetHighPriorityBackgroundThreads(1)
opts.SetEnv(db.env)
db.cache = NewLRUCache(cfg.CacheSize)
blockOpts.SetCache(db.cache)
//we must use bloomfilter
db.filter = NewBloomFilter(defaultFilterBits)
blockOpts.SetFilterPolicy(db.filter)
if !cfg.Compression {
opts.SetCompression(NoCompression)
} else {
opts.SetCompression(SnappyCompression)
}
blockOpts.SetBlockSize(cfg.BlockSize)
opts.SetWriteBufferSize(cfg.WriteBufferSize)
opts.SetMaxOpenFiles(cfg.MaxOpenFiles)
opts.SetMaxBackgroundCompactions(runtime.NumCPU()*2 - 1)
opts.SetMaxBackgroundFlushes(1)
opts.SetLevel0SlowdownWritesTrigger(16)
opts.SetLevel0StopWritesTrigger(64)
opts.SetTargetFileSizeBase(32 * 1024 * 1024)
opts.SetBlockBasedTableFactory(blockOpts)
db.opts = opts
db.blockOpts = blockOpts
db.readOpts = NewReadOptions()
db.writeOpts = NewWriteOptions()
db.iteratorOpts = NewReadOptions()
db.iteratorOpts.SetFillCache(false)
}
func newOptions(cfg *config.LevelDBConfig) *opt.Options {
opts := &opt.Options{}
opts.ErrorIfMissing = false
cfg.Adjust()
opts.BlockCache = cache.NewLRUCache(cfg.CacheSize)
//we must use bloomfilter
opts.Filter = filter.NewBloomFilter(defaultFilterBits)
if !cfg.Compression {
opts.Compression = opt.NoCompression
} else {
opts.Compression = opt.SnappyCompression
}
opts.BlockSize = cfg.BlockSize
opts.WriteBuffer = cfg.WriteBufferSize
return opts
}