Andrei, we run NFS tests on CephFS in our nightlies and it does pretty well so in the general case we expect it to work. Obviously not at the moment with whatever bug Ilya is looking at, though. ;)
-Greg
On Sat, Nov 29, 2014 at 4:51 AM Ilya Dryomov <ilya.dryomov@xxxxxxxxxxx> wrote:
On Sat, Nov 29, 2014 at 3:49 PM, Ilya Dryomov <ilya.dryomov@xxxxxxxxxxx> wrote:
> On Sat, Nov 29, 2014 at 3:22 PM, Andrei Mikhailovsky <andrei@xxxxxxxxxx> wrote:
>> Ilya,
>>
>> I think i spoke too soon in my last message. I've not given it more load
>> (running 8 concurrent dds with bs=4M) and about a minute or so after
>> starting i've seen problems in dmesg output. I am attaching kern.log file
>> for you reference.
>>
>> Please check starting with the following line: Nov 29 12:07:38
>> arh-ibstorage1-ib kernel: [ 3831.906510]. This is when I've started the
>> concurrent 8 dds.
>>
>> The command that caused this is:
>>
>> time dd if=/dev/zero of=4G00 bs=4M count=5K oflag=direct & time dd
>> if=/dev/zero of=4G11 bs=4M count=5K oflag=direct &time dd if=/dev/zero
>> of=4G22 bs=4M count=5K oflag=direct &time dd if=/dev/zero of=4G33 bs=4M
>> count=5K oflag=direct & time dd if=/dev/zero of=4G44 bs=4M count=5K
>> oflag=direct & time dd if=/dev/zero of=4G55 bs=4M count=5K oflag=direct
>> &time dd if=/dev/zero of=4G66 bs=4M count=5K oflag=direct &time dd
>> if=/dev/zero of=4G77 bs=4M count=5K oflag=direct &
>>
>> I've ran the same test about 10 times but with only 4 concurrent dds and
>> that didn't cause the issue.
>>
>> Should I try the 3.18 kernel again to see if 8dds produce similar output?
>
> Missing attachment.
Definitely try the 3.18 testing kernel.
Thanks,
Ilya
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