frostfs-node/pkg/local_object_storage/writecache/options.go

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package writecache
import (
"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
// 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
// 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)
// metrics is metrics implementation
metrics Metrics
// disableBackgroundFlush is for testing purposes only.
disableBackgroundFlush bool
// flushSizeLimit is total size of flushing objects.
flushSizeLimit uint64
}
// 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
}
}
}
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
}
}
// 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
}
}
// 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
}
}
// WithFlushSizeLimit sets flush size limit.
func WithFlushSizeLimit(v uint64) Option {
return func(o *options) {
o.flushSizeLimit = v
}
}