Re: [GIT] Bcache version 12

[Kent Overstreet]

On Thu, Sep 15, 2011 at 3:03 PM, Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
> Does it consider the raid5/6 write hole in what it caches?  Guess I
> need to take a look at the code, but just wondering if it considers
> the need to maintain a consistent strip when writing back to raid5/6
> array, or would there still be a need for a separate driver/region of
> the SSD for caching that data.

Do you mean - if you're caching a raid5 (not the individual devices,
the entire array) the parity blocks?

In that case no, bcache will never see them. However, if you're doing
writeback caching that won't be a huge problem since you'll end up
with more full stripe writes.
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