Jamie, I run a single cluster using CLAY, and have quietly and successfully for 6+ years. Initially, I was concerned about network bandwidth during recovery. I have slowly upgraded network speeds and now that is not a primary consideration.
I've read the relevant blog post and conclusions, and am willing to switch to a recommend Fast EC-supported plugin and technique. That's one datum, I guess. /Jeremy On Tue, Dec 16, 2025 at 11:42 AM Jamie Pryde via ceph-users < [email protected]> wrote: > Hi all, > > I want to make you aware of the Fast EC team's proposal to end support for > some erasure code plugins and techniques. > > We want to do this for a few reasons: > 1. Continuing to support a large list of plugins and techniques requires > development and test effort. We don't think this effort is valuable because > 2. Telemetry data shows that most Ceph clusters that are using EC are > using Jerasure reed_sol_van or ISA-L reed_sol_van, and > 3. Benchmarking shows that reed_sol_van has very good performance on > modern CPUs. > > We are proposing that the following list of plugins and techniques should > be deprecated in the Umbrella release, and support be removed in the V > release: > > * > Jerasure (reed_sol_r6_op, cauchy_orig, cauchy_good, liberation, > blaum_roth, liber8tion) > * > SHEC > * > CLAY > > The following list of plugins and techniques would continue to be > supported in the V release: > > * > Jerasure (reed_sol_van) > * > ISA-L (reed_sol_van, cauchy) > * > LRC (Although Fast EC doesn’t currently support LRC and we wouldn't > recommend using LRC yet, we think we will be able to use it in future to > improve support for erasure coded pools in stretched clusters.) > > I have written a post for the ceph.io blog which contains more details > and shows some of the data behind the proposal. It also talks about the > pool migration feature we are planning to add in Umbrella. This can be used > to migrate data from a pool to a new EC pool that uses a supported > plugin/technique. You can find the blog PR here: > https://github.com/ceph/ceph.io/pull/988 > > We are interested to hear if anyone has any objections to this plan. > Please reply to this mail or leave a comment on the blog PR if you do have > any objections or concerns. We plan to publish the blog post sometime > mid-January. > > > Thanks, > > > > -- > > > > Jamie Pryde > > Software Engineer > > IBM UK > > Unless otherwise stated above: > > IBM United Kingdom Limited > Registered in England and Wales with number 741598 > Registered office: Building C, IBM Hursley Office, Hursley Park Road, > Winchester, Hampshire SO21 2JN > _______________________________________________ > ceph-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > -- Jeremy Austin [email protected] _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
