Hi Konstantin, I hope you or anybody still follows this old thread. Can this EC data pool be configured per pool, not per client? If we follow https://docs.ceph.com/docs/master/rbd/rbd-openstack/ we may see that cinder client will access vms and volumes pools, both with read and write permission. How can we handle this? If we config with different clients for nova (vms) and cinder (volumes), I think there will be a problem if there is cross pool access, especially on write. Let's say that client nova will create volume on instance creation for booting from that volume. Any thoughts? Best regards, > Date: Wed, 11 Jul 2018 11:16:27 +0700 > From: Konstantin Shalygin <k0ste@xxxxxxxx> > To: ceph-users@xxxxxxxxxxxxxx > Subject: Re: Erasure coding RBD pool for OpenStack > Glance, Nova and Cinder > Message-ID: <069ac368-22b0-3d18-937b-70ce39287cb1@xxxxxxxx> > Content-Type: text/plain; charset=utf-8; format=flowed > > > So if you want, two more questions to you : > > > > - How do you handle your ceph.conf configuration (default data pool by > > user) / distribution ? Manually, config management, openstack-ansible... > > ? > > - Did you made comparisons, benchmarks between replicated pools and EC > > pools, on the same hardware / drives ? I read that small writes are not > > very performant with EC. > > > ceph.conf with default data pool is only need for Cinder at image > creation time, after this luminous+ rbd client will be found feature > "data-pool" and will perform data-io to this pool. > > > > # rbd info > > erasure_rbd_meta/volume-09ed44bf-7d16-453a-b712-a636a0d3d812 <----- > > meta pool ! > > rbd image 'volume-09ed44bf-7d16-453a-b712-a636a0d3d812': > > ??????? size 1500 GB in 384000 objects > > ??????? order 22 (4096 kB objects) > > ??????? data_pool: erasure_rbd_data??????? <----- our data pool > > ??????? block_name_prefix: rbd_data.6.a2720a1ec432bf > > ??????? format: 2 > > ??????? features: layering, exclusive-lock, object-map, fast-diff, > > deep-flatten, data-pool????????? <----- "data-pool" feature > > ??????? flags: > > ??????? create_timestamp: Sat Jan 27 20:24:04 2018 > > > > k > > > > ------------------------------ > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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