Re: WAL/DB size

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Wildo / Hemant;

Current recommendations (since at least luminous) say that a block.db device should be at least 4% of the block device.  For a 6 TB drive, this would be 240 GB, not 60 GB.

Thank you,

Dominic L. Hilsbos, MBA 
Director – Information Technology 
Perform Air International Inc.
DHilsbos@xxxxxxxxxxxxxx 
www.PerformAir.com



-----Original Message-----
From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Wido den Hollander
Sent: Tuesday, August 13, 2019 12:51 PM
To: ceph-users@xxxxxxxxxxxxxx
Subject: Re:  WAL/DB size



On 8/13/19 5:54 PM, Hemant Sonawane wrote:
> Hi All,
> I have 4 6TB of HDD and 2 450GB SSD and I am going to partition each
> disk to 220GB for rock.db. So my question is does it make sense to use
> wal for my configuration? if yes then what could be the size of it? help
> will be really appreciated.

Yes, the WAL needs to be about 1GB in size. That should work in allmost
all configurations.

220GB is more then you need for the DB as well. It's doesn't hurt, but
it's not needed. For each 6TB drive you need about ~60GB of space for
the DB.

Wido

> -- 
> Thanks and Regards,
> 
> Hemant Sonawane
> 
> 
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> ceph-users mailing list
> ceph-users@xxxxxxxxxxxxxx
> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> 
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