frostfs-node/pkg/local_object_storage/writecache/options.go
Dmitrii Stepanov 08b1f18bca [#1296] writecache: Add count limit
Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>
2024-08-09 06:30:32 +00:00

175 lines
4.6 KiB
Go

package writecache
import (
"io/fs"
"os"
"time"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
"go.uber.org/zap"
)
// Option represents write-cache configuration option.
type Option func(*options)
type options struct {
log *logger.Logger
// path is a path to a directory for write-cache.
path string
// blobstor is the main persistent storage.
blobstor MainStorage
// metabase is the metabase instance.
metabase Metabase
// maxObjectSize is the maximum size of the object stored in the write-cache.
maxObjectSize uint64
// smallObjectSize is the maximum size of the object stored in the database.
smallObjectSize uint64
// workersCount is the number of workers flushing objects in parallel.
workersCount int
// maxCacheSize is the maximum total size of all objects saved in cache (DB + FS).
// 1 GiB by default.
maxCacheSize uint64
// maxCacheCount is the maximum total count of all object saved in cache.
// 0 (no limit) by default.
maxCacheCount uint64
// objCounters contains atomic counters for the number of objects stored in cache.
objCounters counters
// maxBatchSize is the maximum batch size for the small object database.
maxBatchSize int
// maxBatchDelay is the maximum batch wait time for the small object database.
maxBatchDelay time.Duration
// noSync is true iff FSTree allows unsynchronized writes.
noSync bool
// reportError is the function called when encountering disk errors in background workers.
reportError func(string, error)
// openFile is the function called internally by bbolt to open database files. Useful for hermetic testing.
openFile func(string, int, fs.FileMode) (*os.File, error)
// metrics is metrics implementation
metrics Metrics
// disableBackgroundFlush is for testing purposes only.
disableBackgroundFlush bool
}
// WithLogger sets logger.
func WithLogger(log *logger.Logger) Option {
return func(o *options) {
o.log = &logger.Logger{Logger: log.With(zap.String("component", "WriteCache"))}
}
}
// WithPath sets path to writecache db.
func WithPath(path string) Option {
return func(o *options) {
o.path = path
}
}
// WithBlobstor sets main object storage.
func WithBlobstor(bs MainStorage) Option {
return func(o *options) {
o.blobstor = bs
}
}
// WithMetabase sets metabase.
func WithMetabase(db Metabase) Option {
return func(o *options) {
o.metabase = db
}
}
// WithMaxObjectSize sets maximum object size to be stored in write-cache.
func WithMaxObjectSize(sz uint64) Option {
return func(o *options) {
if sz > 0 {
o.maxObjectSize = sz
}
}
}
// WithSmallObjectSize sets maximum object size to be stored in write-cache.
func WithSmallObjectSize(sz uint64) Option {
return func(o *options) {
if sz > 0 {
o.smallObjectSize = sz
}
}
}
func WithFlushWorkersCount(c int) Option {
return func(o *options) {
if c > 0 {
o.workersCount = c
}
}
}
// WithMaxCacheSize sets maximum write-cache size in bytes.
func WithMaxCacheSize(sz uint64) Option {
return func(o *options) {
o.maxCacheSize = sz
}
}
// WithMaxCacheCount sets maximum write-cache objects count.
func WithMaxCacheCount(v uint64) Option {
return func(o *options) {
o.maxCacheCount = v
}
}
// WithMaxBatchSize sets max batch size for the small object database.
func WithMaxBatchSize(sz int) Option {
return func(o *options) {
if sz > 0 {
o.maxBatchSize = sz
}
}
}
// WithMaxBatchDelay sets max batch delay for the small object database.
func WithMaxBatchDelay(d time.Duration) Option {
return func(o *options) {
if d > 0 {
o.maxBatchDelay = d
}
}
}
// WithNoSync sets an option to allow returning to caller on PUT before write is persisted.
// Note, that we use this flag for FSTree only and DO NOT use it for a bolt DB because
// we cannot yet properly handle the corrupted database during the startup. This SHOULD NOT
// be relied upon and may be changed in future.
func WithNoSync(noSync bool) Option {
return func(o *options) {
o.noSync = noSync
}
}
// WithReportErrorFunc sets error reporting function.
func WithReportErrorFunc(f func(string, error)) Option {
return func(o *options) {
o.reportError = f
}
}
// WithOpenFile sets the OpenFile function to use internally by bolt. Useful for hermetic testing.
func WithOpenFile(f func(string, int, fs.FileMode) (*os.File, error)) Option {
return func(o *options) {
o.openFile = f
}
}
// WithMetrics sets metrics implementation.
func WithMetrics(metrics Metrics) Option {
return func(o *options) {
o.metrics = metrics
}
}
// WithDisableBackgroundFlush disables background flush, for testing purposes only.
func WithDisableBackgroundFlush() Option {
return func(o *options) {
o.disableBackgroundFlush = true
}
}