Hi,
I'm not sure if that's what you need but ceph file layouts [1] could
meet your requirements. Your CephFS can consist of multiple pools
(replicated or EC), and with xattr you can define different pools to
be used for specific directories. Does that help?
Regards,
Eugen
[1] https://docs.ceph.com/en/latest/cephfs/file-layouts/
Zitat von huxiaoyu@xxxxxxxxxxxx:
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
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