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

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package shard
import (
"context"
"errors"
"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
// FlushWriteCachePrm represents parameters of a `FlushWriteCache` operation.
type FlushWriteCachePrm struct {
ignoreErrors bool
}
// SetIgnoreErrors sets the flag to ignore read-errors during flush.
func (p *FlushWriteCachePrm) SetIgnoreErrors(ignore bool) {
p.ignoreErrors = ignore
}
// errWriteCacheDisabled is returned when an operation on write-cache is performed,
// but write-cache is disabled.
var errWriteCacheDisabled = errors.New("write-cache is disabled")
// FlushWriteCache flushes all data from the write-cache.
func (s *Shard) FlushWriteCache(ctx context.Context, p FlushWriteCachePrm) error {
ctx, span := tracing.StartSpanFromContext(ctx, "Shard.FlushWriteCache",
trace.WithAttributes(
attribute.String("shard_id", s.ID().String()),
attribute.Bool("ignore_errors", p.ignoreErrors),
))
defer span.End()
if !s.hasWriteCache() {
return errWriteCacheDisabled
}
s.m.RLock()
defer s.m.RUnlock()
// To write data to the blobstor we need to write to the blobstor and the metabase.
if s.info.Mode.ReadOnly() {
return ErrReadOnlyMode
}
if s.info.Mode.NoMetabase() {
return ErrDegradedMode
}
return s.writeCache.Flush(ctx, p.ignoreErrors)
}