Re: BlueStore bitmap allocator under Luminous and Mimic

[Konstantin Shalygin <k0ste@xxxxxxxx>]

---

Hi,

With the release of 12.2.12 the bitmap allocator for BlueStore is now
available under Mimic and Luminous.

[osd]
bluestore_allocator = bitmap
bluefs_allocator = bitmap

Before setting this in production: What might the implications be and
what should be thought of?

>From what I've read the bitmap allocator seems to be better in read
performance and uses less memory.

In Nautilus bitmap is the default, but L and M still default to stupid.

Since the bitmap allocator was backported there must be a use-case to
use the bitmap allocator instead of stupid.

Thanks!

Wido

Wido, do you setted allocator to bitmap on L installations past this months? Any improvements?

k

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