Dr. Thorsten Brandau schrieb am 18.05.23 um 15:44:
Udo Kaune schrieb am 18.05.23 um 12:38:
Am 11.05.23 um 08:06 schrieb Dr. Thorsten Brandau:
It looks fitting to other services like Rsync. I am running on an
external RAID6, so I assume the discs and caching is just low, as I
have several file storages >80TB on that device. No SSD or so.
Initially I tested the drive with about 400MB/s, so that fits
around the maximum read speed of the discs coming from the raid.
Are there any tweaking parameters I could try?
Cheers
TB
Please try the bacula-sd parameters. This is from our Quantum
Superloader 3 LTO-7 definitions. See if it makes any difference for
you. Despooling sustained ~ 290MB/sec from an SSD Raid 1.
bacula-sd.conf:
Device {
...
# 300 Mb/sec = eof filemark every two minutes, this is not max size
of YOUR files... #8-)
MaximumFileSize = 36G
MaximumBlockSize = 1048576
...
}
Another point would be spooling of file attributes to reduce
intermittent access to you sql server.
Regards
Hi
okay, I will try that. I had set no BlockSize but my Filesize to 3TB
to avoid permanen spooling and despooling.
Let's see if that changes anything.
I reduced the filesize to 36GB but that did not change anything for
the speed. so I will stick with 3TB spool file size. The blocksize did
not change anythign either, the speed is still around 100 MB/s with
tops 200.
MaximumSpoolSize = 256GB
MaximumFileSize = 36GB
MaximumBlockSize = 1048576
are three distinctive parameters... Which one exactly did you change for
testing? Is this a DELL server under warranty? I once had some issues
with a IBM LTO-6 not coming up to speed. It was simply semi-defective...
https://www.dell.com/support/article/us/en/19/sln313984/how-to-create-a-log-with-itdt-ibm-tape-diagnostic-tool-?lang=en
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