* Magnus Hagander (mag...@hagander.net) wrote: > On Mon, Sep 25, 2017 at 7:43 PM, Stephen Frost <sfr...@snowman.net> wrote: > > * Satyanarayana Narlapuram (satyanarayana.narlapu...@microsoft.com) wrote: > > > During crash recovery, last checkpoint record information is obtained > > from the backup label if present, instead of getting it from the control > > file. This behavior is causing PostgreSQL database cluster not to come up > > until the backup label file is deleted (as the error message says). > > > > > > if (checkPoint.redo < checkPointLoc) > > > { > > > if (!ReadRecord(xlogreader, > > checkPoint.redo, LOG, false)) > > > ereport(FATAL, > > > (errmsg("could not > > find redo location referenced by checkpoint record"), > > > errhint("If you are > > not restoring from a backup, try removing the file \"%s/backup_label\".", > > DataDir))); > > > } > > > > > > If we are recovering from a dump file, reading from the backup label > > files makes sense as the control file could be archived after a few > > checkpoints. But this is not the case for crash recovery, and is always > > safe to read the checkpoint record information from the control file. > > > Is this behavior kept this way as there is no clear way to distinguish > > between the recovery from the dump and the regular crash recovery? > > > > This is why the exclusive backup method has been deprecated in PG10 in > > favor of the non-exclusive backup method, which avoids this by not > > creating a backup label file (it's up to the backup software to store > > the necessary information and create the file for use during recovery). > > Actally, it was deprecated already in 9.6, not just 10.
Whoops, right. Thanks for the clarification. :) Stephen
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