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From: Gerardo Herzig <gherzig@fmed.uba.ar>
To: pgsql-sql@postgresql.org
Subject: Re: reading WAL files in python
Date: Mon, 07 Jan 2008 11:26:09 -0300
Message-ID: <47823681.3060102@fmed.uba.ar> (raw)
In-Reply-To: <1199714728.11354.309.camel@chaos>
References: <478226FB.6030306@fmed.uba.ar>
	<1199714728.11354.309.camel@chaos>

C. Bergström wrote:

>On Mon, 2008-01-07 at 10:19 -0300, Gerardo Herzig wrote:
>  
>
>>Hi all. Im having some fun trying to write my own replication system 
>>using python. I will use the postgres own WAL archiving to write the 
>>files,  then my app will read them and do some stuff. As im not a C 
>>programmer, im stuck in the mission of reading the binary files.
>>
>>I guess im needing to know the internals of how wals archives are, how 
>>big the buffer has to be, in order to have a complete sql command.
>>
>>Can someone point some advice?
>>I was trying to understad src/backend/access/transam/xlog.c, but seems 
>>too difficult to me :(
>>
>>    
>>
>
>imho you can save yourself a lot of time by taking a look at skytools[1]
>as it may be more along the lines of what you're trying to accomplish
>anyway.
>
>Cheers,
>
>./C
>
>[1] https://developer.skype.com/SkypeGarage/DbProjects/SkyTools
>
>
>  
>
Oh yes, you already told me about skytools. But im also trying to learn 
more about postgres and python, and this seems to a great oportunity to 
do that. I dont mind if im reinventing the wheel, i usually have fun 
doing it.

Thanks!
Gerardo



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