Re: btrfs-transaction blocked for more than 120 seconds

[Sulla <Sulla@gmx.at>]

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Thanks Chris!

Thanks for your support.

>> echo 120 >/sys/block/sdX/device/timeout
timeout is 30 for my HDDs. I'm well aware that the WD green HDDs are not
the perfect ones for servers, but they were cheaper - and quieter - than
the black ones for servers. I'll get the red ones next, though. ;-)

>> You also need to schedule regular scrubs at the md level as well.

Ubuntu does that once a month.

>> cat /sys/block/mdX/mismatch_cnt
this resides in cat /sys/devices/virtual/block/md1/md/mismatch_cnt on my
machine.
the count is zero.

>> The workload is presumably small file sizes, like a mail server?
Yes. It serves as a mailserver (maildir-format), but also as a samba file
server with quite big files...

btrfs ran fine for more than a year, so I'm not sure how reproducible the
problem is...

I don't really wish to install or compile cumstom kernels, to be honest.
Not sure how problematic they might be during the next do-release-upgrade...

Sulla


- -- 
Russian Roulette is not the same without a gun
and baby when it's love, if it's not rough, it isn't fun, fun.
   Lady GaGa, "Pokerface"












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