Re: [HACKERS] Recovery on incomplete write

Bruce Momjian <maillist@candle.pha.pa.us>

From: Bruce Momjian <maillist@candle.pha.pa.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Hiroshi Inoue <Inoue@tpf.co.jp>, pgsql-hackers <pgsql-hackers@postgreSQL.org>
Date: 1999-09-28T14:54:26Z
Lists: pgsql-hackers
> "Hiroshi Inoue" <Inoue@tpf.co.jp> writes:
> > I have wondered that md.c handles incomplete block(page)s
> > correctly.
> > Am I mistaken ?
> 
> I think you are right, and there may be some other trouble spots in that
> file too.  I remember thinking that the code depended heavily on never
> having a partial block at the end of the file.
> 
> But is it worth fixing?  The only way I can see for the file length
> to become funny is if we run out of disk space part way through writing
> a page, which seems unlikely...
> 

That is how he got started, the TODO item about running out of disk
space causing corrupted databases.  I think it needs a fix, if we can.

-- 
  Bruce Momjian                        |  http://www.op.net/~candle
  maillist@candle.pha.pa.us            |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026