On 10/8/21 9:26 AM, Shaligram Bhagat, Yateen (Nokia - IN/Bangalore) wrote:
Thanks John,
Is it advisable that I run bacula-sd on the remote ZFS based filer
with RAID configured disks.
It depends. The client-SD connection is by its nature a network hog. If
everything is on the same network, then SD writing to a NFS share or
iSCSI device is doubling the network load. If there is a SAN, then that
is not the case, although the sequential write speed of the RAID may be
much greater than the network throughput. In general, I would say yes.
But if not, I would still recommend iSCSI instead of NFS.
At the moment bacula-dir & bacula-sd run on a single host. The disk
space from the filer is used through NFS mounts on the bacula host.
Yateen
*From:*Josh Fisher <[email protected]>
*Sent:* Monday, October 4, 2021 8:27 PM
*To:* [email protected]
*Subject:* Re: [Bacula-users] Storage Daemon stopped with NFS mounted
storage
On 10/2/21 2:52 AM, Shaligram Bhagat, Yateen (Nokia - IN/Bangalore) wrote:
Hi All,
We are using Bacula 9.4.4 with PostGreSQL for disk based backeup.
Disk space is available to Bacula storage daemon as an NFS mount
from a remote ZFS based filer that has RAID configured disks.
Recently one of the disk in the RAID array failed, degrading the
remote ZFS pool.
With NFS, file system caching is on the server hosting the ZFS
filesystem. Additionally, there is data and metadata caching on the
client. Data updates are asynchronous, but metadata updates are
synchronous. Due to the synchronous metadata updates, both data and
metadata updates persist across NFS client failure. However they do
not persist across NFS server failure, and that is what happened here,
I think, although it is not clear why a single disk failure in a RAID
array would cause an NFS failure.
In short, iSCSI will be less troublesome for use with Bacula SD, since
the Bacula SD machine will be the only client using the share anyway.
Later we observed the Bacula storage daemon in stopped state.
Question is : can the disturbance on the NFS mounted disk ( from
the remote ZFS based filer) make bacula-sd to stop?
If you mean bacula-sd crashed, then no, it should not crash if one of
its storage devices fails.
Thanks
Yateen
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