Hi, > On Sep 18, 2017, at 10:06 AM, Christian Theune <ct@xxxxxxxxxxxxxxx> wrote: > > We’re doing the typical SSD/non-SSD pool separation. Currently we effectively only use 2 pools: rbd.hdd and rbd.ssd. The ~4TB OSDs in the rbd.hdd pool are “capacity endurance” SSDs (Micron S610DC). We have 10 machines at the moment with 10 OSDs on average (2 SSD, 1-2 capacity SSD and 6-7 HDDs). Maybe this might be too confusing to how our pools are structured, so I’ll try to clear this up again: We have a pool “rbd.ssd” which uses the OSDs in “datacenter rzob-ssd”. This is an all-flash pool using inline journals and runs on Intel DC S3610. The other pool is “rbd.hdd” which generally uses different disks: * 2TB 7.k SATA HDDs which have a primary affinity of 0 * a couple of 8x600 GB SAS II HGST 3,5” 15k, which have a small primary affinity * 1-2 Micron S610DC 3.8TB with a primary affinity of 1 The HDD pool has grown over time and we’re slowly moving it towards “endurance capacity” SSD models (using external journals on Intel NVME). That’s why it’s not a single OSD configuration. Hope this helps, Christian Liebe Grüße, Christian Theune -- Christian Theune · ct@xxxxxxxxxxxxxxx · +49 345 219401 0 Flying Circus Internet Operations GmbH · http://flyingcircus.io Forsterstraße 29 · 06112 Halle (Saale) · Deutschland HR Stendal HRB 21169 · Geschäftsführer: Christian Theune, Christian Zagrodnick
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