Would reads and writes to the SSD on another server be faster than reads and writes to HDD on the local server? If the answer is no, then even if this was possible it would be worse than just putting your WAL and DB on the same HDD locally. I don't think this is a use case the devs planned for.
You can definitely put multiple WAL land DB partitions on a single SSD. On Wed, Aug 16, 2017, 6:04 AM Hervé Ballans <herve.ball...@ias.u-psud.fr> wrote: > Hi, > > We are currently running two Proxmox/ceph clusters that work perfectly > (since 2014) and thank to this succesful experience, we plan to install > a new Ceph cluster for storage of our computing cluster. > > Until now, we only used RBD (virtualization context) but now we want to > use CephFS for this new cluster (separated from the other two, hardware > is different and dedicated for this new clusters). > > I'm interested in testing a CephFS cluster with BlueStore as a backend > storage. > > I have several OSDs servers (with a dozen SATA HDDs on each) but some do > not have an additional SSD disk (only 3 of the servers have an > additional SSD). > > My question is about BlueStore WAL/DB devices. When I read the > documentation, it seems that adding both WAL and DB devices improve > BlueStore performances. > > But, can we configure these devices on a distant SSD (I mean on a SSD > which is not on the local OSDs server but on an another machine which is > on the same Ceph cluster) ? > > If yes, can I configure mulitple WAL or DB devices on the same SSD ? > > And finally, is it relevant to do that (I mean in term of performance) ? > > Hoping to have been clear on my context, thanks in advance for your > reply or your reflection. > > Regards, > > Hervé > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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