> On Jan 1, 2026, at 8:15 AM, Martin Gerhard Loschwitz 
> <[email protected]> wrote:
> 
> Anthony,
> 
>>> Am 01.01.2026 um 03:01 schrieb Anthony D'Atri via ceph-users 
>>> <[email protected]>:
>>> 
>>> Forgive me if already asked, but:
>>> 
>>> * Is the CephFS metadata pool on enterprise-class NVMe SSDs? Which model, 
>>> and how many? Firmware up to date?
>> 
>> all pools are within the same NVMes within the same RADOS cluster. There are 
>> also no separate devices for BlueStore WAL or any other metadata.
>> 
>>> * Are those shared with other uses? Boot, OSD, etc?
>> 
>> No. Ceph-OSDs are in exclusive use by RADOS:
>> 
>> * How many PGs in the metadata pool, across how many OSDs?
> 
> Cluster has roughly 8200 PGs out of which the large majority is for the data 
> and metadata pools. I will go find the exact numbers. Cluster is 12x16 
> 15.56TB NVMes.

Mainstream TOC enterprise SSDs? 

How many PG replicas per OSD?  The PGS column of `ceph osd df` ?

> 
>> * Is the first CephFS data pool on SSDs, with setfattr layouts used to 
>> attach subdirectories to additional data pools?
>> 
> 
> Everything is on NVMes, but ttbomk, no setfattr was used in any of these.
> 
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> 
> Best regards
> Martin
> 
> --
> Martin Gerhard Loschwitz
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