Re: proper way to create rawdevices in Red Hat Enterprise 5.5

Posted in 2010

Topics: Backup & Restore, Platform-Specific Issues

Doug Lawry — Tue, 14 Dec 2010 01:08:30 -0800 (PST) — source: Usenet: comp.databases.informix

Hi David. Sorry - I only just saw your last posting on this. We found bulk operations such as a level 0 "ontape" either unchanged or slower with raw compared to block devices on recent Linux versions. This surely is expected: with IO_DIRECT, block devices should be fine and there is no need to go via another pseudo device type which is in any case now deprecated. Cheers, Doug

↪ replying to Doug Lawry

Neil Truby — Tue, 14 Dec 2010 22:47:41 -0000 — source: Usenet: comp.databases.informix

"Doug Lawry" <lawry@nildram.co.uk> wrote in message news:dad22f3c-1feb-49c5-81fe-d64b52f8ea91@v23g2000vbi.googlegroups.com... > Hi David. > > Sorry - I only just saw your last posting on this. We found bulk > operations such as a level 0 "ontape" either unchanged or slower with > raw compared to block devices on recent Linux versions. This surely is > expected: with IO_DIRECT, block devices should be fine and there is no > need to go via another pseudo device type which is in any case now > deprecated. Do you have any comparative figures for cooked files also, Doug? cheers

↪ replying to Neil Truby

Doug Lawry — Wed, 15 Dec 2010 03:12:42 -0800 (PST) — source: Usenet: comp.databases.informix

No, Neil, as I don't use cooked files on principle!

Glossary

ontape