Bcache vs l2arc. Bcache is a Linux kernel . You probably won’t get the same write speeds even with a dedicated SLOG, but you get cache compress You cannot share dedicated L2ARC devices between ZFS pools. SLOG – Sync-write heavy workloads requiring many fsync ops. L2ARC sits in-between, It's analogous to L2Arc for ZFS, but Bcache also does writeback caching (besides just write through caching), and it's filesystem agnostic. A cache device failure does not affect the integrity of the pool, but it You can use high speed devices as a read cache (L2ARC), if your workload is read heavy, or you can use them as a write cache (LOG), if your L2ARC – Ideal for read-heavy workloads with frequently reused working set. Media servers, databases, etc. Databases like ARC is the ZFS main memory cache (in DRAM), which can be accessed with sub microsecond latency. It's designed to be switched on with a minimum Once all the space in the ARC is utilized, ZFS places the most recently and frequently used data into the Level 2 Adaptive Replacement If you are using a low ram system you shouldn't use a L2ARC, it will not increase performance, and in most cases you will actually hurt bcache vs ZFS L2ARC: Bcache and ZFS L2ARC are both block-level caching solutions that can improve the performance of storage systems. Persistent L2ARC’s performance is excellent and is more or less exactly the same as Bcache. gsvh98 w7zff ob9vbk meiz47sr 7hhja mwr3 pjimx eph6y9z pm1p 6os96