func newARCCachedBS(ctx context.Context, bs Blockstore, lruSize int) (*arccache, error) {
arc, err := lru.NewARC(lruSize)
if err != nil {
return nil, err
}
c := &arccache{arc: arc, blockstore: bs}
c.hits = metrics.NewCtx(ctx, "arc.hits_total", "Number of ARC cache hits").Counter()
c.total = metrics.NewCtx(ctx, "arc_total", "Total number of ARC cache requests").Counter()
return c, nil
}
// bloomCached returns Blockstore that caches Has requests using Bloom filter
// Size is size of bloom filter in bytes
func bloomCached(bs Blockstore, ctx context.Context, bloomSize, hashCount, lruSize int) (*bloomcache, error) {
bl, err := bloom.New(float64(bloomSize), float64(hashCount))
if err != nil {
return nil, err
}
arc, err := lru.NewARC(lruSize)
if err != nil {
return nil, err
}
bc := &bloomcache{blockstore: bs, bloom: bl, arc: arc}
bc.Invalidate()
go bc.Rebuild(ctx)
return bc, nil
}