Re: crash-recovery replay of CREATE TABLESPACE is broken in HEAD

Bruce Momjian <bruce@momjian.us>

From: Bruce Momjian <bruce@momjian.us>
To: Bruce Momjian <bruce@momjian.us>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, pgsql-hackers@postgresql.org
Date: 2010-07-20T18:21:47Z
Lists: pgsql-hackers

Attachments

Bruce Momjian wrote:
> Bruce Momjian wrote:
> > > The attached patch does as suggested.  I added the recovery code to the
> > > create tablespace function so I didn't have to duplicate all the code
> > > that computes the path names.
> > > 
> > > Attached.
> > 
> > Uh, another question.  Looking at the createdb recovery, I see:
> > 
> >         /*
> >          * Our theory for replaying a CREATE is to forcibly drop the target
> >          * subdirectory if present, then re-copy the source data. This may be
> >          * more work than needed, but it is simple to implement.
> >          */
> >         if (stat(dst_path, &st) == 0 && S_ISDIR(st.st_mode))
> >         {
> >             if (!rmtree(dst_path, true))
> >                 ereport(WARNING,
> >                         (errmsg("some useless files may be left behind in old database directory \"%s\"",
> >                                 dst_path)));
> >         }
> > 
> > Should I be using rmtree() on the mkdir target?
> > 
> > Also, the original tablespace recovery code did not drop the symlink
> > first.  I assume that was not a bug only because we don't support moving
> > tablespaces:
> 
> For consistency with CREATE DATABASE recovery and for reliablity, I
> coded the rmtree() call instead.  Patch attached.

Attached patch applied to HEAD and 9.0.   9.0 open item moved to
completed.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + None of us is going to be here forever. +