we are using mixed too, intel PCIE 400G SSD * 8 for metadata pool and tier caching pool for our cephfs.
*plus:* *'osd crush update on start = false*' as Vladimir replied. 2017-03-03 20:33 GMT+08:00 Дробышевский, Владимир <[email protected]>: > Hi, Matteo! > > Yes, I'm using mixed cluster in production but it's pretty small at the > moment. I've made a smal step by step manual for myself when I did this for > the first time and now put it as a gist: https://gist.github.com/vheathen/ > cf2203aeb53e33e3f80c8c64a02263bc#file-manual-txt. Probably it could be a > little bit outdated since it was some time ago. > > Crush map modifications are going to be persistent in case of reboots > and maintenance if you put *'osd crush update on start = false*' to the > [osd] section of ceph conf. > > But I would also recommend to start from this article: https://www. > sebastien-han.fr/blog/2014/08/25/ceph-mix-sata-and-ssd- > within-the-same-box/ > > P.S. While I was writing this letter I've seen a letter from Maxime > Guyot. Seems that his method is much easier if it leads to the same results. > > Best regards, > Vladimir > > С уважением, > Дробышевский Владимир > Компания "АйТи Город" > +7 343 2222192 <+7%20343%20222-21-92> > > Аппаратное и программное обеспечение > IBM, Microsoft, Eset > Поставка проектов "под ключ" > Аутсорсинг ИТ-услуг > > 2017-03-03 16:30 GMT+05:00 Matteo Dacrema <[email protected]>: > >> Hi all, >> >> Does anyone run a production cluster with a modified crush map for create >> two pools belonging one to HDDs and one to SSDs. >> What’s the best method? Modify the crush map via ceph CLI or via text >> editor? >> Will the modification to the crush map be persistent across reboots and >> maintenance operations? >> There’s something to consider when doing upgrades or other operations or >> different by having “original” crush map? >> >> Thank you >> Matteo >> -------------------------------------------- >> This email and any files transmitted with it are confidential and >> intended solely for the use of the individual or entity to whom they are >> addressed. If you have received this email in error please notify the >> system manager. This message contains confidential information and is >> intended only for the individual named. If you are not the named addressee >> you should not disseminate, distribute or copy this e-mail. Please notify >> the sender immediately by e-mail if you have received this e-mail by >> mistake and delete this e-mail from your system. If you are not the >> intended recipient you are notified that disclosing, copying, distributing >> or taking any action in reliance on the contents of this information is >> strictly prohibited. >> >> >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> > > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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