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 Probably it could be a little bit outdated since it was some time ago.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 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 > >
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