On Tue, Oct 18, 2016 at 3:46 AM, Lars Marowsky-Bree <l...@suse.com> wrote:
> On 2016-10-18T00:06:57, Erick Perez - Quadrian Enterprises < > epe...@quadrianweb.com> wrote: > > > Is EC in the roadmap for CEPH? Cant seem to find it. My question is > because > > "all others" (Nutanix, Hypergrid) do EC storage for VMs as the default > way > > of storage. It seems EC in ceph (as of Sept 2016) is considered by many > > "experimental" unless is used for cold data. > > Right now (Jewel) you have to "cheat" and put a cache tier in front of > an EC pool if you want to use it for block or direct data access (like > CephFS). That actually works quite well, and you can then also use > much faster storage media in front of your dense EC pool. > > The downside is you have to understand how to set some of the cache > tiering tunables and be able to size it appropriately, and understand > the impact of cache tiering on your cluster performance (e.g., the > overhead of the additional traffic between the tiers). Yet, it works > well. > > Partial overwrites for EC pools directly is on the roadmap for > Kraken/Luminous, probably leveraging some of BlueStore's new features. > If I understood Sage correctly, he considers that a release criteria for > Luminous. > > That'd allow us to directly access EC pools w/o the need for cache > tiering. > > > > Regards, > Lars > > -- > SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB > 21284 (AG Nürnberg) > "Experience is the name everyone gives to their mistakes." -- Oscar Wilde > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > Thanks Lars, I was reading about bluestore last night. I will wait for a Kraken release to test as much EC functionality as possible at least from a non-programmer point of use. Point and click tunables for EC is something that will for sure be needed at least for some of us that do not run a gazillion VMs and Petas of object storage. Hopefully if i develop more know-how in EC I can help with testing predefined tunables that can be available for smaller installations to use, like the ones i use (always in Hewlett packard hardware) at least in my country we do not run white-box hardware outside a lab. I guess my first goal will be to learn how to obtain proper meaningful metrics when testing VM loads and object loads. Thanks to all for the comments, -- --------------------- Erick Perez
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