Thread

Online base backup from the hot-standby

Jun Ishiduka <ishizuka.jun@po.ntts.co.jp> — 2011-08-05T06:45:47Z

> I will provide a patch which can exeute pg_start/stop_backup
> including to solve above comment and conditions in next stage.
> Then please review.

done.


* Procedure

1. Call pg_start_backup('x') on the standby.
2. Take a backup of the data dir.
3. Call pg_stop_backup() on the standby.
4. Copy the control file on the standby to the backup.
5. Check whether the control file is status during hot standby with pg_controldata.
   -> If the standby promote between 3. and 4., the backup can not recovery.
      -> pg_control is that "Minimum recovery ending location" is equals 0/0.
      -> backup-end record is not written.

* Not correspond yet

  * full_page_write = off
    -> If the primary is "full_page_write = off", archive recovery may not act 
       normally. Therefore the standby may need to check whether "full_page_write
       = off" to WAL.

--------------------------------------------
Jun Ishizuka
NTT Software Corporation
TEL：045-317-7018
E-Mail: ishizuka.jun@po.ntts.co.jp
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