Ceph OSD db and wal size

Gabor

Active Member
Feb 3, 2016
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Hello Guys!

I have a big question for the ceph cluster and I need your help or your opinion.

I installed a simple 3 nodes setup with Ceph.
In one node has 2x146 GB HW RAID 1 + 18x 600 GB 10k SAS without RAID.
(Summary we have 54 OSD device and we have to buy 3 SSD for journal)

And my big question for the DB and WAL partition size. I don't know how about this, or can we separate two another partition ...

How can calculate this partition size ? What is the official value for this ?

I think I'll add 10GB db partition and 1 GB wal partition each OSD disk. What do you think ?

Many thanks!

Best,
G.
 
I think I'll add 10GB db partition and 1 GB wal partition each OSD disk. What do you think ?
In addition to @wolfgang 's answer. The WAL lives with the DB together, if not specified otherwise.
 
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