Le 04/07/2017 à 19:00, Jack a écrit :
> You may just upgrade to Luminous, then replace filestore by bluestore

You don't just "replace" filestore by bluestore on a production cluster
: you transition over several weeks/months from the first to the second.
The two must be rock stable and have predictable performance
characteristics to do that.
We took more than 6 months with Firefly to migrate from XFS to Btrfs and
studied/tuned the cluster along the way. Simply replacing a store by
another without any experience of the real world behavior of the new one
is just playing with fire (and a huge heap of customer data).

Best regards,

Lionel
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