Hi Maged,
min_alloc_size determines allocation granularity hence if object size
isn't aligned with its value allocation overhead still takes place.
E.g. with min_alloc_size = 16K and object size = 24K total allocation
(i.e. bluestore_allocated) would be 32K.
And yes, this overhead is permanent.
Thanks,
Igor
On 6/17/2019 1:06 AM, Maged Mokhtar wrote:
Hi all,
I want to understand more the difference between bluestore_allocated
and bluestore_stored in the case of no compression. If i am writing
fixed objects with sizes greater than min alloc size, would
bluestore_allocated still be higher than bluestore_stored ? If so, is
this a permanent overhead/penalty or is something the allocator can
re-use/optimize later as more objects are stored ?
Appreciate any help.
Cheers /Maged
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