Re: What's the best practice for Erasure Coding

[Jake Grimmett <jog@xxxxxxxxxxxxxxxxx>]

Hi David,

How many nodes in your cluster? k+m has to be smaller than your node count, preferably by at least two.

How important is your data? i.e. do you have a remote mirror or backup, if not you may want m=3

We use 8+2 on one cluster, and 6+2 on another.

Best,

Jake

On 7 July 2019 19:01:18 BST, David <xiaomajia.st@xxxxxxxxx> wrote:

Hi Ceph-Users,

 

I'm working with a  Ceph cluster (about 50TB, 28 OSDs, all Bluestore on lvm).

Recently, I'm trying to use the Erasure Code pool.

My question is "what's the best practice for using EC pools ?".

More specifically, which plugin (jerasure, isa, lrc, shec or  clay) should I adopt, and how to choose the combinations of (k,m) (e.g. (k=3,m=2), (k=6,m=3) ).

 

Does anyone share some experience?

 

Thanks for any help.

 

Regards,

David

 

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.

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