On 30/10/2023 22.41, Patrick O'Callaghan wrote:
On Mon, 2023-10-30 at 22:35 +1100, fedora@xxxxxxxxxxxxxx wrote:
On 30/10/2023 21.40, Patrick O'Callaghan wrote:
On Mon, 2023-10-30 at 18:22 +1100, fedora@xxxxxxxxxxxxxx wrote:
Should I blame rsync (or the way I use it)?
Next, I will do a plain 'cp -a' between the original source (sdh
on
/sata) and target(md127 on /data1) to see how it goes.
If you say how you use it, someone might be able to answer that.
Give
the exact command line with all options (e.g. if you have strict
change
detection you might be checksumming every file on the source before
deciding to copy it).
First, I already did this test and it still chokes after a few GB.
The problem is still there
and it is not only an rsync problem. But why does rsync use 100% CPU?
I thought that I gave the command but I did not initially, yet when I
show the output of 'ps' it says:
sudo rsync -aHSK --stats --progress --checksum-choice=none --
no-compress -W /sata/backups/tapes /data1/no-backup/old-backups/
so there it is.
Nothing obvious at first glance. The '-W' option should mean that rsync
is simply copying files without it's usual delta detection, which could
have been the culprit.
I lost you here. 'the culprit' of what? It was very slow initially.
I then added '-W' hoping to speed it up but it did not help.
I also added '--checksum-choice=none --no-compress' for the same reason (probably
not needed) but none had an effect.
I suspect this may be related to another thread I started earlier 'kworker consumes 100% CPU on degraded RAID6'
poc
--
Eyal at Home (fedora@xxxxxxxxxxxxxx)
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