Hi James, at GARR we recently tested the cinder multi backend with the following idea in mind: support 3 different backends:
- a default one, for general-purpose disks like virtual machine boot disks: replicated pool with replica factor equal to 3 - a reduced redundancy one: replicated pool with replica factor 2, which should slightly improve latency - a large capacity one: erasure-coded (possibly with a small frontend replicated pool) Premise: we have a juju deployed O~S (spanning 3 geographical data centers). We configured Cinder such that it allows selection between multiple “Volume Types”, where each Volume Type points to a distinct Ceph pool within the same Ceph cluster. This is the simplest configuration, as it involves Cinder configuration alone. Volumes which are created can be later attached to running instances, but all instances will have their boot disk on the default pool cinder-ceph. We faced some issues as reported in details here: https://docs.google.com/document/d/1VSS28cvZBIOEzTOmVMWZ0o9FiVFkVLvu__ZOLxneMqQ/edit# Would be interesting to find a way to be able to select the pool also for the boot disk of a VM Any comment, idea, "whatever" (also on the doc) is very much appreciated best Alex Dr. Alex Barchiesi ____________________________________ Senior cloud architect Art -Science relationships responsible GARR CSD department Rome GARR: +39 06 4962 2302 Lausanne EPFL: +41 (0) 774215266 linkedin: alex barchiesi <http://www.linkedin.com/profile/view?id=111538190&goback=%2Enmp_*1_*1_*1_*1_*1_*1_*1_*1_*1_*1&trk=spm_pic> _____________________________________ I started with nothing and I still have most of it. On Sat, Apr 14, 2018 at 3:25 AM, James Beedy <jamesbe...@gmail.com> wrote: > Looking for examples that describe how to consume multiple ceph backends > using the cinder-ceph charm. > > Thanks > > -- > Juju mailing list > Juju@lists.ubuntu.com > Modify settings or unsubscribe at: https://lists.ubuntu.com/ > mailman/listinfo/juju > >
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