On 2 July 2013 20:20, Toby Corkindale
<[email protected]> wrote:
<...>
>
> Having looked at it a bit more, it seems better suited to the
> SSD-caching scenario than ZFS; there are auto-tuning parameters in
> bcache to detect at what point to just bypass the cache and go straight
> to the disks, saving more cache room for blocks that will benefit.

This is precisely what the ZFS L2ARC is supposed to do.

> And the write-ahead logging is limited only by the size of the
> cache.(Whereas ZFS' ZIL can't grow very large)

I don't know enough about bcache writes to make a comparison, but the
maximum ZIL size would only be dictated by write throughput.

At least bcache is filesystem agnostic and doesn't suffer from the NIH syndrome.

--
Joel Shea <[email protected]>
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