Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi All,
After reading the last posts from the last few days about the
synchronisation i've added some figures to my drbd.conf:
resync-rate 10M; #(this was already there @20M)
c-plan-ahead 20;
c-max-rate 30M;
c-fill-target 20M;
It now synchronises nicely at around 30Mb/s, no big ups and downs any more.
I guess a blog post and maybe some extra detail in the manual would help
on this matter.
8.4.2rc1 still works fine, no problems the last few days.
Cheers,
Dirk
Op 15-8-2012 12:24, Dirk Bonenkamp - ProActive schreef:
> Hi all,
>
> I've installed 8.4.2rc1 on my test systems (ubuntu 10.04 x86_64,
> dedicated bonded gigabit nics for DRBD, single seagate 2.5" sata disk,
> 7200rpm, 16Mb cache (ST9160412AS)).
>
> Installing and upgrading all went flawless (dkms users: don't forget to
> uncomment the modprobe option for the drbd module, this new version
> doesn't need it any more).
>
> Some dd tests (averages of 3 runs on a system without load):
>
> dd if=/dev/zero of=1G.bin bs=1024M count=1 oflag=direct
> 8.3.13: 29.5 MB/s
> 8.4.2rc1: 28.3 MB/s
>
> dd if=/dev/zero of=1G.bin bs=1024 count=1000 oflag=direct
> 8.3.13: 109 kB/s
> 8.4.2rc1: 112.7 kB/s
>
> No big differences here.
>
> Resync runs, verify runs all went OK. Fencing works as it should.
>
> The only weird thing I noticed is the behaviour of the syncer. I've this
> option in my drbd.conf:
>
> resync-rate 20M;
>
> But when doing a verify run the rates are al over the place, I've
> noticed values between 3 and 120 MB/s... Even if the 'resync-rate'
> option is ignored and this is the 'auto sync rate', the fluctuations do
> look a bit weird to me. But, as mention above, the result of a resync of
> verify run seems OK.
>
> I've put some normal workload on the machines and everything works as it
> worked before.
>
> I'm happy to do some extra tests or provide additional details, just let
> me know.
>
> Kind regards,
>
> Dirk
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