Re: How to stress test raid6 on 122 disk array

[Erkki Seppala <flux-btrfs@inside.org>]

Martin <rc6encrypted@gmail.com> writes:

> The smallest disk of the 122 is 500GB. Is it possible to have btrfs
> see each disk as only e.g. 10GB? That way I can corrupt and resilver
> more disks over a month.

Well, at least you can easily partition the devices for that to happen.

However, I would also suggest that would it be more useful use of the
resource to run many arrays in parallel? Ie. one 6-device raid6, one
20-device raid6, and then perhaps use the rest of the devices for a very
large btrfs filesystem? Or if you have been using partitioning the large
btrfs volume can also be composed of all the 122 devices; in fact you
could even run multiple 122-device raid6s and use different kind of
testing on each. For performance testing you might only excert one of
the file systems at a time, though.

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