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Re: WIP patch for parallel pg_dump

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: WIP patch for parallel pg_dump
Date: 2010-12-02 18:10:45
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers

On 12/02/2010 12:56 PM, Josh Berkus wrote:
> On 12/02/2010 05:50 AM, Dimitri Fontaine wrote:
>> So the use case of parralel dump in a bunch or user given locations
>> would be to use different mount points (disk subsystems) at the same
>> time.  Not sure how releveant it is.
> I think it will complicate this feature unnecessarily for 9.1. 
> Personally, I need this patch so much I'm thinking of backporting it. 
> However, having all the data go to one directory/mount wouldn't 
> trouble me at all.
> Now, if only I could think of some way to write a parallel dump to a 
> set of pipes, I'd be in heaven.

The only way I can see that working sanely would be to have a program 
gathering stuff at the other end of the pipes, and ensuring it was all 
coherent. That would be a huge growth in scope for this, and I seriously 
doubt it's worth it.



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