varnish backing file gone missing

[Matt Schurenko]

Thanks for the help. It looks like the previous sys admin had  a cron job that deleted everything in /tmp. 

Sent from my iPhone

On 2011-09-26, at 3:52 PM, "Mark Moseley" <moseleymark at gmail.com> wrote:

> On Mon, Sep 26, 2011 at 3:37 PM, Matt Schurenko <MSchurenko at airg.com> wrote:
>> Yeah it says "deleted" when I use lsof. Is this going to cause a problem eventually? Since the file is gone is the kernel just using RAM alone now? Swap usage hasn't increased. I'm wondering how it is continuing to function.
> 
>> -----Original Message-----
>> From: varnish-misc-bounces at varnish-cache.org [mailto:varnish-misc-bounces at varnish-cache.org] On Behalf Of Mark Moseley
>> Sent: September-26-11 1:00 PM
>> Cc: varnish-misc at varnish-cache.org
>> Subject: Re: varnish backing file gone missing
>> 
>> On Mon, Sep 26, 2011 at 12:54 PM, Matt Schurenko <MSchurenko at airg.com> wrote:
>>> Update:
>>> 
>>> 
>>> 
>>> I noticed that I mistakenly created a 40GB  zero-filled file rather than a
>>> 48GB one:
>>> 
>>> 
>>> 
>>> dd if=/dev/zero of=/tmp/varnish-cache bs=1G count=40
>>> 
>>> 
>>> 
>>> Not sure if that would make any difference.
>>> 
>>> 
>>> 
>>> Matt Schurenko
>>> Systems Administrator
>>> 
>>> 
>>> airG® Share Your World
>>> Suite 710, 1133 Melville Street
>>> 
>>> Vancouver, BC  V6E 4E5
>>> 
>>> P: +1.604.408.2228
>>> 
>>> F: +1.866.874.8136
>>> 
>>> E: MSchurenko at airg.com
>>> 
>>> W: www.airg.com
>>> 
>>> From: varnish-misc-bounces at varnish-cache.org
>>> [mailto:varnish-misc-bounces at varnish-cache.org] On Behalf Of Matt Schurenko
>>> Sent: September-26-11 12:43 PM
>>> To: varnish-misc at varnish-cache.org
>>> Subject: varnish backing file gone missing
>>> 
>>> 
>>> 
>>> I just noticed that the backing file I configured varnish to use is now
>>> gone:
>>> 
>>> 
>>> 
>>> [root at mvp13 ~]# ps -ef | grep varnishd
>>> 
>>> root      4419     1  0 Sep07 ?        00:00:00 /usr/local/sbin/varnishd -s
>>> file,/tmp/varnish-cache,48G -T 127.0.0.1:2000 -a 0.0.0.0:80 -t 604800 -f
>>> /usr/local/etc/varnish/default.vcl -p http_headers 384 -p connect_timeout
>>> 4.0
>>> 
>>> 
>>> 
>>> [root at mvp13 ~]# ls /tmp/varnish-cache
>>> 
>>> ls: /tmp/varnish-cache: No such file or directory
>>> 
>>> 
>>> 
>>> If I do an lsof I see this:
>>> 
>>> 
>>> 
>>> varnishd   4420 nobody    4u      REG                8,1 51539607552
>>> 62160904 /tmp/varnish-cache (deleted)
>>> 
>>> 
>>> 
>>> I'm pretty sure I never deleted it. Is this normal behaviour? What are the
>>> implications of this file being removed while varnish is running? Varnishd
>>> still appears to be working fine. I have another varnish server running but
>>> the backing file is still there. BTW I'm running varnish version 2.1.5.
>>> 
>>> 
>>> 
>> 
>> Perhaps a log rotation script deleted it? If so and varnishd is still
>> running, it should show up in lsof with "(deleted)" next to the
>> pathname.
> 
> It'll work as long as varnishd has it open. It'll only get released
> when varnished closes it. I'd suggest moving to something like
> /var/{lib,cache,run}/varnish
> 
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