On Tue, 1 Jun 2021 12:24:12 -0700
Neha Ojha <nojha@xxxxxxxxxx> wrote:
> Given that BlueStore has been the default and more widely used
> objectstore since quite some time, we would like to understand whether
> we can consider deprecating FileStore in our next release, Quincy and
> remove it in the R release. There is also a proposal [0] to add a
> health warning to report FileStore OSDs.
I'd consder this:
- Bluestore requires OSD hosts with 8GB+ of RAM
- In my experience, it performs poorly on HDD-based clusters with a
small number of disks
- There are very few single-board computers that have 8GB+ of RAM:
- Raspberry Pi 4 has 8GB, at about AU$100 a pop -- such a machine
could service *one* OSD. Also, only one Ethernet port.
- PC Engines APU[234] stop at 4GB RAM at present, a shame since
they'd otherwise make great small-form-factor OSD nodes.
- Lots of other ARM-based SBCs stop at 2GB RAM. There are a few out
there that have SATA and multiple Ethernet ports, but RAM rules them
out for BlueStore.
- Intel NUCs and similar machines can do Ceph work, but only one
Ethernet port is a limitation. (Plus the need to use a console
to manage them instead of using a BMC with a server board or
a multiplexed serial console is a nuisance.)
Not all of us using Ceph are big corporates with deep pockets.
--
Stuart Longland (aka Redhatter, VK4MSL)
I haven't lost my mind...
...it's backed up on a tape somewhere.
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