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Re: NFS and fsfs: slow commit performance

From: Blair Zajac <blair_at_orcaware.com>
Date: Tue, 18 Jan 2011 08:58:08 -0800

On Jan 18, 2011, at 6:49 AM, Florian Weimer wrote:

> * Blair Zajac:
>
>> Attempting to perform high commit rates into an fsfs repository on NFS
>> with two or more Linux boxes, one of the processes can get stuck in
>> fcntl() for over 30 seconds:
>>
>> open("repo/db/write-lock", O_RDWR) = 4
>> fcntl(4, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}
>
> What's the return value of fcntl?
>
> (I wonder if this is a firewall issue, and the lock is never actually
> acquired.)

It did succeed. This was one of many fcntl() calls, I just did a control-C in strace.

Blair
Received on 2011-01-18 17:58:55 CET

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