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Re: [HACKERS] Performance while loading data and indexing

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Rod Taylor <rbt(at)rbt(dot)ca>
Cc: Neil Conway <neilc(at)samurai(dot)com>,Greg Copeland <greg(at)CopelandConsulting(dot)Net>,shridhar_daithankar(at)persistent(dot)co(dot)in,PostgresSQL Hackers Mailing List <pgsql-hackers(at)postgresql(dot)org>,PostgresSQL General Mailing List <pgsql-general(at)postgresql(dot)org>
Subject: Re: [HACKERS] Performance while loading data and indexing
Date: 2002-09-26 21:47:43
Message-ID: 200209262147.g8QLlhU10159@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-hackerspgsql-performance
Rod Taylor wrote:
> > Yes, before UFS had soft updates, the synchronous nature of UFS made it
> > slower than ext2, but now with soft updates, that performance difference
> > is gone so you have two files systems, ext2 and ufs, similar peformance,
> > but one is crash-safe and the other is not.
> 
> Note entirely true.  ufs is both crash-safe and quick-rebootable.  You
> do need to fsck at some point, but not prior to mounting it.  Any
> corrupt blocks are empty, and are easy to avoid.

I am assuming you need to mount the drive as part of the reboot.  Of
course you can boot fast with any file system if you don't have to mount
it.  :-)

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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