Hello Samuel, you can use the docs from https://docs.ceph.com/en/latest/cephfs/file-layouts/ to find out how to put a file on a different pool. Example: "setfattr -n ceph.dir.layout.pool -v poolname foldername" Ceph itself does unfortunately not provide tiering out of the box. You therefore have to write a script das scans your storage and migrates files. This will cause a lot of IOs and CPU/RAM on the MDS, so make sure it won't affect your regular operations. Pseudo code like: for each file in cephfs do if file.date < xxxx then // or whatever you want copy file to new temporary file in pool remove old file rename temp file to old file location -- Martin Verges Managing director Mobile: +49 174 9335695 E-Mail: martin.verges@xxxxxxxx Chat: https://t.me/MartinVerges croit GmbH, Freseniusstr. 31h, 81247 Munich CEO: Martin Verges - VAT-ID: DE310638492 Com. register: Amtsgericht Munich HRB 231263 Web: https://croit.io YouTube: https://goo.gl/PGE1Bx On Mon, 19 Jul 2021 at 23:28, huxiaoyu@xxxxxxxxxxxx <huxiaoyu@xxxxxxxxxxxx> wrote: > Dear Cepher, > > I have a requirement to use CephFS as a tiered file system, i.e. the data > will be first stored onto an all-flash pool (using SSD OSDs), and then > automatically moved to an EC coded pool (using HDD OSDs) according to > threshold on file creation time (or access time). The reason for such a > file system is due to the fact that, files are created and most likely > accessed within the first 6 months or 1 year, and after that period, those > files have much less chance to be accessed and thus could be moved to a > slower and cheap pool. > > Does CephFS already support such a tiered feature? and if yes, how to > implement such feature with a pool of all SSD pool and a pool of EC-coded > HDD pool? > > Any suggestion, ideas, comments are highly appreciated, > > best regards, > > samuel > > > > huxiaoyu@xxxxxxxxxxxx > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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