On 18.01.19 11:48, Eugen Leitl wrote: > OSD on every node (Bluestore), journal on SSD (do I need a directory, or a > dedicated partition? How large, assuming 2 TB and 4 TB Bluestore HDDs?)
You need a partition on the SSD for the block.db (it's not a journal anymore with blustore). You should look into osd_memory_target to configure the osd process with 1 or 2 GB of RAM in your setup. > Can I run ceph-mon instances on the two D510, or would that already overload > them? No sense to try running 2x monitors on D510 and one on the 330, right? Yes, Mons need some resources. If you have set osd_memory_target they may fit on your Atoms. > I've just realized that I'll also need ceph-mgr daemons on the hosts running > ceph-mon. I don't see the added system resource requirements for these. The mgr process is quite light in resource usage. > Assuming BlueStore is too fat for my crappy nodes, do I need to go to > FileStore? If yes, then with xfs as the file system? Journal on the SSD as a > directory, then? Journal for FileStore is also a block device. Regards -- Robert Sander Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin https://www.heinlein-support.de Tel: 030 / 405051-43 Fax: 030 / 405051-19 Amtsgericht Berlin-Charlottenburg - HRB 93818 B Geschäftsführer: Peer Heinlein - Sitz: Berlin
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