Ah, I didn’t notice the release it was for.  Sorry ☹  I now know to pay closer 
attention to that when I am on the Ceph docs ☹

From: Anthony D'Atri <anthony.da...@gmail.com>
Sent: February 4, 2025 16:19
To: Anthony D'Atri <anthony.da...@gmail.com>
Cc: Alan Murrell <a...@t-net.ca>; ceph-users@ceph.io
Subject: Re: [ceph-users] Spec file: Possible typo in example:

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Now that I’m not on my phone …

Note the URL that you supplied:  it specifies the documentation branch for the 
Octopus release, which is now EOL.  This can happen especially when following 
search engine results for a query.  This highlights the value in ensuring that 
one gets the appropriate docs for the release in question.   For recent 
releases you can usually edit the URL in-situ.  In this case the file topology 
changed.  The Pacific release restructured this section and this content is now 
found under cephadm/services/osd:


[cid:image001.png@01DB7724.93A7D760]
ceph/doc/cephadm/services/osd.rst at 6c97777c921609acd26242f99a1c9dbbcd667f3e · 
ceph/ceph<https://github.com/ceph/ceph/blob/6c97777c921609acd26242f99a1c9dbbcd667f3e/doc/cephadm/services/osd.rst?plain=1#L762>
github.com<https://github.com/ceph/ceph/blob/6c97777c921609acd26242f99a1c9dbbcd667f3e/doc/cephadm/services/osd.rst?plain=1#L762>

Following the git branches through Quincy then Reef I see

[cid:image001.png@01DB7724.93A7D760]
Blaming ceph/doc/cephadm/services/osd.rst at reef · 
ceph/ceph<https://github.com/ceph/ceph/blame/reef/doc/cephadm/services/osd.rst#L818>
github.com<https://github.com/ceph/ceph/blame/reef/doc/cephadm/services/osd.rst#L818>


that this was caught and fixed ~ 3 years ago.



On Feb 4, 2025, at 5:27 PM, Anthony D'Atri 
<anthony.da...@gmail.com<mailto:anthony.da...@gmail.com>> wrote:

Nice catch.  I’ll get a fix in.


On Feb 4, 2025, at 2:10 PM, Alan Murrell <a...@t-net.ca<mailto:a...@t-net.ca>> 
wrote:

Hello,

I am not sure if this is the right list to put this, but I was just looking 
over the documentation for the Service Spec file:

https://docs.ceph.com/en/octopus/cephadm/drivegroups/

and under one of the "Advanced Cases" example, I believe there *might* be an 
error?  Here is the example (for 20 HDDs, 12 SSDs, 2 NVMEs):

--- START ---
service_type: osd
service_id: osd_spec_hdd
placement:
host_pattern: '*'
data_devices:
rotational: 0
db_devices:
model: MC-55-44-XZ
limit: 2 (db_slots is actually to be favoured here, but it's not implemented 
yet)
---
service_type: osd
service_id: osd_spec_ssd
placement:
host_pattern: '*'
data_devices:
model: MC-55-44-XZ
db_devices:
vendor: VendorC
--- END ---

For the 'data_devices' under the 'osd_spec_hdd' layout, should 'rotational' not 
be '1' instead of '0'?  The earlier "Simple" example (20 HDDs, 2 SSDs) has 
'rotational' as '1'.

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