Slow backups

[Pete Forde]

We have a Bareos installation with a Scalar I3 library connected and two IBM LTO7 drives attached by 8G fibre. but we are only seeing the backups run at 97MB/sec. very slow

Pete

[Brock Palen]

97MB/s sounds suspiciously that there is a 1gig network path somewhere between your client and the storage server.

If you run iperf between the host and the server and get > 100MB/s and thus using larger networking, next I would check compression settings, I would also check storage system throughput.

Lastly I would go back and re-run the btape testing from the manual to check the performance of your tape path subsystem.


Brock Palen
bro...@mlds-networks.com
www.mlds-networks.com
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> On Jun 16, 2022, at 2:29 PM, Pete Forde <pete....@stellarcreativelab.com> wrote:
>
> We have a Bareos installation with a Scalar I3 library connected and two IBM LTO7 drives attached by 8G fibre. but we are only seeing the backups run at 97MB/sec. very slow
>
>
> Pete
>

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[Alan Brown]

It pays to check that compression is disabled on network paths faster than 100Mb/s. That can easily kill throughput on a fast LAN thanks to CPU bottlenecking