Hi Ashley,
general rule is that compression switch do not affect existing data but
controls future write request processing.
You can enable/disable compression at any time.
Once disabled - no more compression is happening. And data that has been
compressed remains in this state until removal or overwrite or (under
some circumstances when keeping it compressed isn't beneficial any
more) garbage collection. The latter is mostly triggered by some
partial overwrite.
Thanks,
Igor
On 5/2/2019 12:20 PM, Ashley Merrick wrote:
Hello,
I am aware that when enabling compression in bluestore it will only
compress new data.
However, if I had compression enabled for a period of time, is it then
possible to disable compression and any data that was compressed
continue to be uncompressed on read as normal but any new data not be
compressed.
Or once it's enabled for a pool there is no going back apart from
creating a new fresh pool?
, Ashley
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