Re: WIP/PoC for parallel backup

From: Stephen Frost <sfrost(at)snowman(dot)net>
To: Ahsan Hadi <ahsan(dot)hadi(at)gmail(dot)com>
Cc: Asif Rehman <asifr(dot)rehman(at)gmail(dot)com>, Asim R P <apraveen(at)pivotal(dot)io>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: WIP/PoC for parallel backup
Date: 2019-08-23 19:42:54
Message-ID: 20190823194254.GL16436@tamriel.snowman.net
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Greetings,

* Ahsan Hadi (ahsan(dot)hadi(at)gmail(dot)com) wrote:
> On Fri, 23 Aug 2019 at 10:26 PM, Stephen Frost <sfrost(at)snowman(dot)net> wrote:
> > I would expect you to quickly want to support compression on the server
> > side, before the data is sent across the network, and possibly
> > encryption, and so it'd likely make sense to just have independent
> > processes and connections through which to do that.
>
> It would be interesting to see the benefits of compression (before the data
> is transferred over the network) on top of parallelism. Since there is also
> some overhead associated with performing the compression. I agree with your
> suggestion of trying to add parallelism first and then try compression
> before the data is sent across the network.

You're welcome to take a look at pgbackrest for insight and to play with
regarding compression-before-transfer, how best to split up the files
and order them, encryption, et al. We've put quite a bit of effort into
figuring all of that out.

Thanks!

Stephen

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