On Fri, Oct 15, 2021 at 8:22 AM Matthew Vernon <mvernon@xxxxxxxxxxxxx> wrote: > > Hi, > > Stretch clusters[0] are new in Pacific; does anyone have experience of > using one in production? > > I ask because I'm thinking about new RGW cluster (split across two main > DCs), which I would naturally be doing using RGW multi-site between two > clusters. > > But it strikes me that a stretch cluster might be simpler (multi-site > RGW isn't entirely straightforward e.g. round resharding), and 2 copies > per site is quite a bit less storage than 3 per site. But I'm not sure > if this new feature is considered production-deployment-ready > > Also, if I'm using RGWs, will they do the right thing location-wise? > i.e. DC A RGWs will talk to DC A OSDs wherever possible? Stretch clusters are entirely a feature of the RADOS layer at this point; setting up RGW/RBD/CephFS to use them efficiently is left as an exercise to the user. Sorry. :/ That said, I don't think it's too complicated — you want your CRUSH rule to specify a single site as the primary and to run your active RGWs on that side, or else to configure read-from-replica and local reads if your workloads support them. But so far the expectation is definitely that anybody deploying this will have their own orchestration systems around it (you can't really do HA from just the storage layer), whether it's home-brewed or Rook in Kubernetes, so we haven't discussed pushing it out more within Ceph itself. -Greg > > Thanks, > > Matthew > > [0] https://docs.ceph.com/en/latest/rados/operations/stretch-mode/ > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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