Date: Mon, 03 Nov 2008 20:43:53 -0500 From: Mike Tancsa <mike@sentex.net> To: "Poul-Henning Kamp" <phk@phk.freebsd.dk> Cc: freebsd-stable@freebsd.org Subject: Re: fifo log problem Message-ID: <200811040143.mA41hjaa029665@lava.sentex.ca> In-Reply-To: <7.1.0.9.0.20081103113557.167702f0@sentex.net> References: <Your message of "Mon, 03 Nov 2008 10:47:39 EST." <200811031547.mA3FlVVs024666@lava.sentex.ca> <43507.1225730046@critter.freebsd.dk> <7.1.0.9.0.20081103113557.167702f0@sentex.net>
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At 11:48 AM 11/3/2008, Mike Tancsa wrote:
>At 11:34 AM 11/3/2008, Poul-Henning Kamp wrote:
>>In message <200811031547.mA3FlVVs024666@lava.sentex.ca>, Mike Tancsa writes:
>>
>> >Seems to work fine with cat
>>
>>Ok, and the loss is not from one end, it is random records in
>>the middle ?
>
>
>Yes, they seem to initially get written and then tail off for some
>reason. I am not sure why. Actually, if I SIGHUP syslogd, it seems
>to make a difference, in that I can generally see when newsyslog sig
>HUPs syslog to do log rotation. Perhaps this is confusing things ?
I tried changing the config so that there is only the fifo log being
written to and disabled newsyslog so that syslogd is not getting a
HUP signal. The strange thing is that reading from it gives
different results?!?
Sometimes doing
[ps0278]# fifolog_reader all.fifo | wc
>From 0 Wed Dec 31 19:00:00 1969
To 1225760679 Mon Nov 3 20:04:39 2008
Read from 1d800
59 413 3068
0[ps0278]#
and a exactly for 1min it will show the correct results
0[ps0278]# fifolog_reader all.fifo | wc
>From 0 Wed Dec 31 19:00:00 1969
To 1225760538 Mon Nov 3 20:02:18 2008
Read from 0
10765 75995 556816
0[ps0278]#
and then go back to showing just a subset for 4 min. I am guessing
this coincides with when the flush runs
This is a nanobsd image, so /var on /dev/md1 and RELENG_7 from a few days ago
I have been running
#!/bin/sh
i=0
while true
do
i=`expr $i + 1`
logger $i
echo $i
sleep 1
done
and they seem to be there when it shows all the results, but for the
most part it just shows a subset
---Mike
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