RE: Cooked vs Raw in 11.5 on Linux
Just to add something here doing some testing on Solaris10/IDS11.5 we saw between 35 and 80% performance DROP when we enable DIRECT_IO. Raw was quicker by 20% Cheers Paul -----Original Message----- From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of Art Kagel Sent: Friday, May 14, 2010 1:45 PM To: ids@iiug.org Subject: Re: Cooked vs Raw in 11.5 on Linux [20168] IB RAW is still better. We've had inconsistent results from using COOKED devices and files with Linux and DIRECT_IO. I prefer the consistency of RAW. Art Art S. Kagel Advanced DataTools (www.advancedatatools.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Advanced DataTools, the IIUG, nor any other organization with which I am associated either explicitly, implicitly, or by inference. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves. On Fri, May 14, 2010 at 2:24 PM, Wyza, Jonathon <wyzaj@bethelcollege.edu>wrote: > SLES 11x64, IDS 11.5 x64 (unknown sub number since I don't have the disc in > my > hands yet). > > We will be going to IDS 11.5 soon and it has been recommended that on our > Linux platform we use cooked files instead of raw ones. > > 2 questions: is the performance roughly equivalent now? I've read posts > from > 3-4 years ago that said raw will always be better but I wasn't sure. > > Also how does one go about setting the dbspaces up using cooked files? I've > had experience setting up raw files for the chunks but if cooked is the way > to > go then I'm gonna need a pointer in the right direction. > > Jonathon Wyza > CX & CBORD System Administrator > CX Programmer/Analyst > Administrative Computing > Bethel College > (574)-257-3381 > AIM: Iamwyza > jonathon.wyza@bethelcollege.edu<mailto:jonathon.wyza@bethelcollege.edu> > ============================== > SLES 10x32 SP2 & IDS 10.00.UC9 > > "Mostly, when you see programmers, they aren't doing anything. One of the > attractive things about programmers is that you cannot tell whether or not > they are working simply by looking at them. Very often they're sitting > there > seemingly drinking coffee and gossiping, or just staring into space. What > the > programmer is trying to do is get a handle on all the individual and > unrelated > ideas that are scampering around in his head." > - Charles M. Strauss > > > > **************************************************************************** *** > Forum Note: Use "Reply" to post a response in the discussion forum. > > --00504502b5121c90b8048692467b **************************************************************************** *** Forum Note: Use "Reply" to post a response in the discussion forum. _____ avast! Antivirus <http://www.avast.com>; : Outbound message clean. Virus Database (VPS): 100514-0, 05/14/2010 Tested on: 5/14/2010 1:47:54 PM avast! - copyright (c) 1988-2010 ALWIL Software.