Re: Luminous CephFS on EC - how?

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On Wed, Aug 30, 2017 at 11:06:02AM +0200, Peter Maloney wrote:
> What kind of terrible mail client is this that sends a multipart message where
> one part is blank and that's the one Thunderbird chooses to show? (see
> blankness below)

It's a real email client (mutt) sending text to the mailing list, with a
attached PGP signature. The list servers does various violence to the
emails sent and your client renders that as it sees fit I suppose. WFM.

> Yes you're on the right track. As long as the main fs is on a replicated pool
> (the one with omap), the ones below it (using file layouts) can be EC without
> needing a cache pool.

Thanks!

> a quote from your first url: http://docs.ceph.com/docs/master/rados/operations/
> erasure-code/#erasure-coding-with-overwrites
> 
> 
>     For Cephfs, using an erasure coded pool means setting that pool in a file
>     layout.

Yeah that's not very descriptive at all to me without clear examples for
EC on the link target.

/M

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