Re: About compress in pg_dump

[Adrian Klaver]

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 > 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.kla...@aklaver.com

Re: About compress in pg_dump

[Adrian Klaver]

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.kla...@aklaver.com

Re: About compress in pg_dump

[Diego]

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 > 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

[David G. Johnston]

On Fri, Jul 17, 2020 at 7:49 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?
>

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.