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From Paras Fadte <plf...@gmail.com>
Subject Re: Using gzip and CustomLog
Date Fri, 23 Jan 2009 06:55:17 GMT
Hi,

I get following error when I try to use "compress" function of zlib in
 "rotatelogs.c" . I have included "zlib.h" in rotatelogs.c .

/home/paras/httpd-2.0.55/support/rotatelogs.c:294: undefined reference
to `compress'
collect2: ld returned 1 exit status

Is it linking error ? where should I make the changes to eliminate this error?

Thank you.

-Paras


On Thu, Jan 22, 2009 at 3:08 PM, Rainer Jung <rainer.jung@kippdata.de> wrote:
> On 22.01.2009 08:38, Paras Fadte wrote:
>>
>> Can anyone respond to this query of mine?
>
> I don't have a very nice solution.
>
> I expect you need to create something on your own, using the fact, that the
> pipe syntax in httpd let's you pass the log information to any external
> logger you like.
>
> I expect you would need to create a rotate and compress solution yourself.
>
> The problem is: if you first pipe through rotatelogs, then the name of the
> file changes each time it rotates, so an easy compress solution is a bit
> difficult. If you first pipe through compress/gzip, then the data looses
> it's text line structure. In both cases, one would have to solve the
> buffering issue.
>
> Most people compress via cron jobs, and not on the fly. Please try the users
> list to find more ideas. If you don't find a solution, you might file an
> enhancement request in bugzilla.
>
> Regards,
>
> Rainer
>
>> On Wed, Jan 21, 2009 at 8:15 PM, Paras Fadte<plfgoa@gmail.com>  wrote:
>>>
>>> Thanks for the response.
>>>
>>> Noticed that graceful apache restart tends to flush the buffer to log
>>> when gzip is used . Can you please shed some light on combining/using
>>> gzip and rotatelogs utility together ?
>>>
>>> -Paras
>>>
>>> On Wed, Jan 21, 2009 at 7:46 PM, Rainer Jung<rainer.jung@kippdata.de>
>>>  wrote:
>>>>
>>>> On 21.01.2009 13:01, Paras Fadte wrote:
>>>>>
>>>>> I tried this and It creates "mydomain.com-access_log.gz" but doesn't
>>>>> seem to update it.
>>>>
>>>> That's the buffering of gzip I mentioned.
>>>>
>>>> Run /path/to/httpd/bin/ab -n 50000 -c 10 -k http://myserver:myport/
>>>>
>>>> and you'll see data arriving.
>>>>
>>>> Regards,
>>>>
>>>> Rainer
>>>>
>>>>> On Wed, Jan 21, 2009 at 4:27 PM, Rainer Jung<rainer.jung@kippdata.de>
>>>>>  wrote:
>>>>>>
>>>>>> On 21.01.2009 07:09, Paras Fadte wrote:
>>>>>>>
>>>>>>> Hi ,
>>>>>>>
>>>>>>> Does something like following work in Apache/2.0.55 ?
>>>>>>>
>>>>>>> CustomLog "|/bin/gzip  -c
>>>>>>>>>
>>>>>>>>> /home/mydir/apache/logs/mydomain.com-access_log.gz" combined
>>>>>>>
>>>>>>> In errorlog it says :
>>>>>>>
>>>>>>> piped log program '/bin/gzip  -c
>>>>>>>>>
>>>>>>>>> /home/mydir/apache/logs/mydomain.com-access_log.gz' failed
>>>>>>>
>>>>>>> unexpectedly
>>>>>>> gzip:>>/home/mydir/apache/logs/mydomain.com-access_log.gz:
No such
>>>>>>> file or directory
>>>>>>>
>>>>>>>
>>>>>>> What could be the issue here ?
>>>>>>
>>>>>> It does work for me with Apache 2.2.x. Be sure to add whitespace
>>>>>> before
>>>>>> and
>>>>>> after ">>" (although that wasn't necessary for 2.2.x).
>>>>>>
>>>>>> If it doesn't work for 2.0, you can use the following workaround,
that
>>>>>> should do it: create gzip.sh (executable shell script) with the
>>>>>> content:
>>>>>>
>>>>>> #!/bin/sh
>>>>>> gzip -c>>   $1
>>>>>>
>>>>>> and use "|/path/to/gzip.sh mylogfile" in the CustomLog.
>>>>>>
>>>>>> Caution: it's possible to loose log lines when restarting or stopping
>>>>>> the
>>>>>> web server, because gzip buffers data and it might be implementation
>>>>>> dependent, whether gzip flushes them when signaled to stop. My tests
>>>>>> show,
>>>>>> that there will be some information lost.
>>>>>>
>>>>>> I think this discussion belongs to the users list. When proceeding
the
>>>>>> discussion there, also mention which OS you are using.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Rainer
>
>

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