Re: K AIO

LSM is not used It is a Compaq HSG80 cabinet with 18, 36 or 72GB disk in RAID 0+1 in combination with a Compaq ES40. Told was that there would be only a minor difference between Advfs and RAW solution for our datbase, so we choose Advfs Since we came from a DS20E dual processor with RAW devices on the same cabinet (checkpoints 0-1 seconds), now we see checkpoints up to 10 seconds with the ES40 quad processor with Advfs. The onconfig was the same. "Colin Bull" <c.bull@videonetworks.com> schreef in bericht news:bob402$20c$1@terabinaries.xmission.com... > > You must use raw disk to use KAIO. > > You should see 25% approx speed improvement. > What disks are you using? Are you using LSM ? > > Colin Bull > c.bull@videonetworks.com > > > -----Original Message----- > > From: owner-informix-list@iiug.org > > [mailto:owner-informix-list@iiug.org]On Behalf Of DeeWee > > Sent: 05 November 2003 10:45 > > To: informix-list@iiug.org > > Subject: K AIO > > > > > > Hi, > > > > Is K AIO of any use when the db is on advfs files? > > > > (Runinng 7.31 on Tru64 5.1b) > > > > How can it be activated? (onstat -g iov doesn't show any kio) > > > > > > > sending to informix-list

On Thu, 06 Nov 2003 05:44:47 -0500, DeeWee wrote: Yeah, the FS vendors think their advanced and low overhead FSes are as good as RAW, but their not. Yes, they are only 20-30% slower than RAW rather than the 25-40% slower than RAW for a normal UNIX filesystem, but they are still slower. Art S. Kagel > LSM is not used > > It is a Compaq HSG80 cabinet with 18, 36 or 72GB disk in RAID 0+1 in > combination with a Compaq ES40. > > Told was that there would be only a minor difference between Advfs and RAW > solution for our datbase, so we choose Advfs > > Since we came from a DS20E dual processor with RAW devices on the same cabinet > (checkpoints 0-1 seconds), now we see checkpoints up to 10 seconds with the > ES40 quad processor with Advfs. The onconfig was the same. > > > "Colin Bull" <c.bull@videonetworks.com> schreef in bericht > news:bob402$20c$1@terabinaries.xmission.com... >> >> You must use raw disk to use KAIO. >> >> You should see 25% approx speed improvement. What disks are you using? Are >> you using LSM ? >> >> Colin Bull >> c.bull@videonetworks.com >> >> > -----Original Message----- >> > From: owner-informix-list@iiug.org >> > [mailto:owner-informix-list@iiug.org]On Behalf Of DeeWee Sent: 05 November >> > 2003 10:45 >> > To: informix-list@iiug.org >> > Subject: K AIO >> > >> > >> > Hi, >> > >> > Is K AIO of any use when the db is on advfs files? >> > >> > (Runinng 7.31 on Tru64 5.1b) >> > >> > How can it be activated? (onstat -g iov doesn't show any kio) >> > >> > >> > >> sending to informix-list