I haven't tried it, but the man page for setstripe --pool explains it.
Cheers,
Hans Henrik
On 06.07.2022 22.50, Thomas Roth via lustre-discuss wrote:
Yes, I got it.
But Marion states that they switched
> to a PFL arrangement, where the first 64k lives on flash OST's
(mounted on our metadata s
On Jul 6, 2022, at 14:50, Thomas Roth mailto:t.r...@gsi.de>>
wrote:
Yes, I got it.
But Marion states that they switched
> to a PFL arrangement, where the first 64k lives on flash OST's (mounted on
> our metadata servers), and the remainder of larger files lives on HDD OST's.
So, how do you spec
Hello all,
We recently rebuilt our filesystem on 2.15.0 due to issues we were seeing on our
legacy volume. The mds and oss-es are rhel 8.6 The mdt is zfs as are all the
osts. We built from b2_15 to get the rhel 8.6 compat commits.
It's been working pretty well for the past week or so until we had
Hi Thomas,
I'll just clarify that on our system, the flash OSTs happen to
be connected to the same servers which are our MDS's. But they
are just OST's so in this case the MDS machines are also acting
as OSS machines for our flash OST's.
We do indeed have an nvme pool of OST's, and an hdd pool o
Yes, I got it.
But Marion states that they switched
> to a PFL arrangement, where the first 64k lives on flash OST's (mounted on
our metadata servers), and the remainder of larger files lives on HDD OST's.
So, how do you specify a particular OSTs (or group of OSTs) in a PFL?
The OST-equivalent o
Thomas,
where the file data is stored depends entirely on the PFL layout used for the
filesystem or parent directory.
For DoM files, you need to specify a DoM component, like:
lfs setstripe -E 64K -L mdt -E 1G -c 1 -E 16G -c 4 -E eof -c 32
so the first 64KB will be put onto the MDT where t
Hi Marion,
I do not fully understand how to "mount flash OSTs on a metadata server"
- You have a couple of SSDs, you assemble these into on block device and format it with "mkfs.lustre
--ost ..." ? And then mount it just as any other OST?
- PFL then puts the first 64k on these OSTs and the rest
