Re: [PERFORM] Backup taking long time !!!

От: Stephen Frost
Тема: Re: [PERFORM] Backup taking long time !!!
Дата: ,
Msg-id: 20170123172054.GF18360@tamriel.snowman.net
(см: обсуждение, исходный текст)
Ответ на: Re: [PERFORM] Backup taking long time !!!  (Torsten Zuehlsdorff)
Список: pgsql-performance

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[PERFORM] Backup taking long time !!!  (Dinesh Chandra 12108, )
 Re: [PERFORM] Backup taking long time !!!  ("Madusudanan.B.N", )
  Re: [PERFORM] Backup taking long time !!!  (Dinesh Chandra 12108, )
   Re: [PERFORM] Backup taking long time !!!  (Pavel Stehule, )
    Re: [PERFORM] Backup taking long time !!!  ("Madusudanan.B.N", )
    Re: [PERFORM] Backup taking long time !!!  (Dinesh Chandra 12108, )
     Re: [PERFORM] Backup taking long time !!!  (Pavel Stehule, )
      Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
  Re: [PERFORM] Backup taking long time !!!  (Vladimir Borodin, )
   Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
 Re: [PERFORM] Backup taking long time !!!  (Vladimir Borodin, )
  Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
 Re: [PERFORM] Backup taking long time !!!  (Vladimir Borodin, )
  Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
   Re: [PERFORM] Backup taking long time !!!  (Jim Nasby, )
    Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
     Re: [PERFORM] Backup taking long time !!!  (Jim Nasby, )
   Re: [PERFORM] Backup taking long time !!!  (David Steele, )
  Re: [PERFORM] Backup taking long time !!!  (Torsten Zuehlsdorff, )
   Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
 Re: [PERFORM] Backup taking long time !!!  (Vladimir Borodin, )
  Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
 Re: [PERFORM] Backup taking long time !!!  (julyanto SUTANDANG, )
  Re: [PERFORM] Backup taking long time !!!  (julyanto SUTANDANG, )
   Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
    Re: [PERFORM] Backup taking long time !!!  (Jeff Janes, )
     Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
     Re: [PERFORM] Backup taking long time !!!  (Simon Riggs, )
      Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
      Re: [PERFORM] Backup taking long time !!!  (Jeff Janes, )
       Re: [PERFORM] Backup taking long time !!!  (Rick Otten, )
        Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
     Re: [PERFORM] Backup taking long time !!!  (julyanto SUTANDANG, )
  Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
 Re: [PERFORM] Backup taking long time !!!  (julyanto SUTANDANG, )
  Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
 Re: [PERFORM] Backup taking long time !!!  (julyanto SUTANDANG, )
  Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
   Re: [PERFORM] Backup taking long time !!!  (Jim Nasby, )
    Re: [PERFORM] Backup taking long time !!!  (Jeff Janes, )
     Re: [PERFORM] Backup taking long time !!!  (Stephen Frost, )
 Re: [PERFORM] Backup taking long time !!!  (julyanto SUTANDANG, )

Greetings,

* Torsten Zuehlsdorff () wrote:
> I just have around 11 TB but switched to ZFS based backups only. I'm
> using snapshots therefore which gives some flexibility. I can
> rolback them, i can just clone it and work with a full copy as a
> different cluster (and just the differences are stored) and i can
> send them incrementally to other servers. This is very fine for my
> use cases but it doesn't fit everything of course.

While that's another approach, it does require that those snapshots are
performed correctly (both by you and by ZFS) and are entirely atomic to
the entire PG instance.

For example, I don't believe ZFS snapshots will be atomic if multiple
ZFS filesystems on independent ZFS pools are being used underneath a
single PG instance.

And, as others have also said, always test, test, test.

Thanks!

Stephen

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