Hi, I didn't see where you said there is no journal on bluestore.
Maybe I'm confusing the terminology. I have created a DB and WAL device for my Bluestore, but I presume that's not a journal (anymore?). This is how I set it up this time: ceph-disk prepare --bluestore /dev/sdc --block.wal /dev/sde --block.db /dev/sde Apart from "ceph grafana", which I can't install at this stage since the cluster isn't ready yet, how else can I test the SSD cache drives? On Tue, Nov 21, 2017 at 10:37 AM, Christian Balzer <[email protected]> wrote: > On Tue, 21 Nov 2017 10:23:20 +0200 Rudi Ahlers wrote: > > > Hi, > > > > Is it possible to test the CEPH journal to see if it performs optimally? > > > You're using bluestore, as I said before, there is no journal. > > The SSDs you're using are top of the line, perfectly suited for what > you're using them for. > > > And, how can I see how much data is being cached? > > > Nothing gets cached per se with bluestore. > As for utilization, there were values for the journal, AFAIK there isn't > anything for the DB stuff at this point. > > In general, google "ceph grafana", you will REALLY want to monitor a ceph > cluster this way. > > -- > Christian Balzer Network/Systems Engineer > [email protected] Rakuten Communications > -- Kind Regards Rudi Ahlers Website: http://www.rudiahlers.co.za
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