Skip site navigation (1) Skip section navigation (2)

Re: GZIP of pre-zipped output

From: Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>
To: Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>
Cc: Dave Crooke <dcrooke(at)gmail(dot)com>, David Newall <postgresql(at)davidnewall(dot)com>, pgsql-performance(at)postgresql(dot)org, robertmhaas(at)gmail(dot)com, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: GZIP of pre-zipped output
Date: 2010-03-22 03:00:31
Message-ID: dcc563d11003212000t313a20d2v47b3e9c9531940b5@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-performance
On Sun, Mar 21, 2010 at 8:46 PM, Craig Ringer
<craig(at)postnewspapers(dot)com(dot)au> wrote:
> On 22/03/2010 1:04 AM, Dave Crooke wrote:
>>
>> If you are really so desparate to save a couple of GB that you are
>> resorting to -Z9 then I'd suggest using bzip2 instead.
>>
>> bzip is designed for things like installer images where there will be
>> massive amounts of downloads, so it uses a ton of cpu during
>> compression, but usually less than -Z9 and makes a better result.
>
> bzip2 doesn't work very well on gzip'd (deflated) data, though. For good
> results, you'd want to feed it uncompressed data, which is a bit of a pain
> when the compression is part of the PDF document structure and when you
> otherwise want the PDFs to remain compressed.
>
> Anyway, if you're going for extreme compression, these days 7zip is often a
> better option than bzip2.

There's often a choice of two packages, 7z, and 7za, get 7za, it's the
later model version.

In response to

pgsql-performance by date

Next:From: Greg SmithDate: 2010-03-22 05:00:44
Subject: Re: pgbench installation
Previous:From: Craig RingerDate: 2010-03-22 02:46:32
Subject: Re: GZIP of pre-zipped output

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group