On 08/14/2018 02:44 PM, Tapio Lehtonen wrote:
I'm building a BackupPC host, with two SSD disks and two 4 TB rotating
disks connected to LSI Logic / Symbios Logic MegaRAID SAS 2108
[Liberator] (rev 05). Operating system is Debian GNU/Linux 9.5. The plan
is to put OS on SSD disks with RAID1, and BackupPC data pool to rotating
disk with RAID1. SSD disks are 240 GB each, I'm open to suggestions how
to use part of them for cache or journal device or something.
That disk controller has reasonably performant RAID with battery backup,
so I prefer using those features. Thus ZFS is not good, my understanding
is ZFS should be used with plain host bus adapters.
I'm thinking XFS, so inode allocation is not a problem (previously I
asked in this mailing list how to recover from out of inodes). What I
read indicate XFS is equal or better than Ext4 for most features.
I could not find recent recommendations for file system used with
BackupPC. Those old ones I found say ReiserFS is good, it probably is
but not much maintained recently.
So, any recommendation for file system?
Terve Tapio,
I would also choose XFS in your case since ZFS is not a good option for you.
Furthermore, if you want to put the SSD:s to good use, you can put the
'pc' folder on them if the following conditions are being met:
- You are running BackupPC 4
- You have no BackupPC 3 backups left (no hardlinks between pc and cpool
or pool)
- $Conf{PoolV3Enabled} is off
That will give you a huge performance boost for indexing etc.
Best regards,
Johan Ehnberg
--
Johan Ehnberg
Founder, CEO
jo...@molnix.com
+358503209688
Molnix Oy
molnix.com
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