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About compress in pg_dump

From
Edmundo Robles
Date:
To backup  a database  I do:
 nice -n +19  pg_dump -Fc  database | nice -n +19 gzip --rsyncable   -nc >  database.dump

If -Fc  option  is compressed  by default  I dont need gzip the backup,  but I need pass --rsyncable  and -n options.

How can  I pass  gzip options  to compress in pg_dump?

if not   I will use : 
nice -n +19  pg_dump -Fc -Z 0 database | nice -n +19 gzip --rsyncable   -nc >  database.dump
but I dont want to do that. :)

Thanks   for your help...

--

Re: About compress in pg_dump

From
"David G. Johnston"
Date:
On Fri, Jul 17, 2020 at 7:49 AM Edmundo Robles <edmundo@sw-argos.com> wrote:
To backup  a database  I do:
 nice -n +19  pg_dump -Fc  database | nice -n +19 gzip --rsyncable   -nc >  database.dump

If -Fc  option  is compressed  by default  I dont need gzip the backup,  but I need pass --rsyncable  and -n options.

How can  I pass  gzip options  to compress in pg_dump?

pg_dump isn't using the gzip program, it's just performing compression per the gzip compression specification, and doesn't provide those two features to control it's processing (or any features beyond what's documented on the pg_dump reference page).

David J.

Re: About compress in pg_dump

From
Diego
Date:

Yep, I transfer backups files all the time with -Fc and never the problem was rsync

On 2020-07-17 12:07, David G. Johnston wrote:
On Fri, Jul 17, 2020 at 7:49 AM Edmundo Robles <edmundo@sw-argos.com> wrote:
To backup  a database  I do:
 nice -n +19  pg_dump -Fc  database | nice -n +19 gzip --rsyncable   -nc >  database.dump

If -Fc  option  is compressed  by default  I dont need gzip the backup,  but I need pass --rsyncable  and -n options.

How can  I pass  gzip options  to compress in pg_dump?

pg_dump isn't using the gzip program, it's just performing compression per the gzip compression specification, and doesn't provide those two features to control it's processing (or any features beyond what's documented on the pg_dump reference page).

David J.

Re: About compress in pg_dump

From
Adrian Klaver
Date:
On 7/17/20 7:48 AM, Edmundo Robles wrote:
> To backup  a database  I do:
>   nice -n +19  pg_dump -Fc  database | nice -n +19 gzip --rsyncable   
> -nc >  database.dump
> 
> If -Fc  option  is compressed  by default  I dont need gzip the backup,  
> but I need pass --rsyncable  and -n options.
> 
> How can  I pass  gzip options  to compress in pg_dump?
> 
> if not   I will use :
> nice -n +19  pg_dump -Fc -Z 0 database | nice -n +19 gzip --rsyncable   
> -nc >  database.dump
> but I dont want to do that. :)

Do you need the custom format on the other end?

Or can you just use the plain format dump and pipe that to gzip with 
appropriate options?

You will then need to use psql to do the restore though.

> 
> Thanks   for your help...
> 
> -- 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com

Re: About compress in pg_dump

From
Adrian Klaver
Date:
On 7/17/20 8:12 AM, Diego wrote:
> Yep, I transfer backups files all the time with -Fc and never the 
> problem was rsync

Using --rsyncable with gzip really helps if you rsync the compressed 
file to somewhere else it exists. It greatly reduces the amount of data 
sent for files that a do not have a massive amount of changes between syncs.

> 
> On 2020-07-17 12:07, David G. Johnston wrote:
>> On Fri, Jul 17, 2020 at 7:49 AM Edmundo Robles <edmundo@sw-argos.com 
>> <mailto:edmundo@sw-argos.com>> wrote:
>>
>>     To backup  a database  I do:
>>      nice -n +19  pg_dump -Fc  database | nice -n +19 gzip --rsyncable
>>       -nc >  database.dump
>>
>>     If -Fc  option  is compressed  by default  I dont need gzip the
>>     backup,  but I need pass --rsyncable and -n options.
>>
>>     How can  I pass  gzip options  to compress in pg_dump?
>>
>>
>> pg_dump isn't using the gzip program, it's just performing compression 
>> per the gzip compression specification, and doesn't provide those two 
>> features to control it's processing (or any features beyond what's 
>> documented on the pg_dump reference page).
>>
>> David J.
>>


-- 
Adrian Klaver
adrian.klaver@aklaver.com