Re: [GENERAL] server hardware recommendations (the archives aredead) - Mailing list pgsql-general

From Bruce Momjian
Subject Re: [GENERAL] server hardware recommendations (the archives aredead)
Date
Msg-id 199912152351.SAA09027@candle.pha.pa.us
Whole thread Raw
In response to Re: [GENERAL] server hardware recommendations (the archives aredead)  ("J. Roeleveld" <j.roeleveld@softhome.net>)
Responses Re: [GENERAL] server hardware recommendations (the archives aredead)  (The Hermit Hacker <scrappy@hub.org>)
List pgsql-general
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> > What filesystem?  I know (thank god) very little about Linux, but
> > there have been comments here by some Linux folks (Thomas, wasn't it
> > you?) that indicated that ext2fs sucks for this?  Are you running with
> > fsync() on or off?
>
> What is the problem with ext2fs? Is it just performance? or is there a
> serious chance for me losing data?

The only comment made was something I said about raw devices on Linux.
Someone said there is a raw device option for Linux and whether we
wanted to try using it.  I said most modern filesystems can move data at
the speed of the disk, so raw devices really don't buy much.  I
mentioned that ext2 is not a modern file system.  The *BSD filesystems
are an example of a modern file system.  This may be what Marc is
remembering.

Unfortunately, this does not relate to the user's question.

(Raw devices do have advantages because of read-ahead control and disk
flush control.  However, we seem to be doing fine without these marginal
improvements, and raw devices have a host of complex problems when
implemented.)

--
  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

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