Re: Vinum write performance (was: RAID performance (was: cvs commit: src/sys/kern subr_diskmbr.c))

2001-12-12 Thread Bernd Walter
On Wed, Dec 12, 2001 at 04:22:05PM +1030, Greg Lehey wrote: On Tuesday, 11 December 2001 at 3:11:21 +0100, Bernd Walter wrote: striped: If you have 512byte stripes and have 2 disks. You access 64k which is put into 2 32k transactions onto the disk. Only if your software optimizes the

Re: Vinum write performance (was: RAID performance (was: cvs commit: src/sys/kern subr_diskmbr.c))

2001-12-12 Thread Greg Lehey
On Wednesday, 12 December 2001 at 12:53:37 +0100, Bernd Walter wrote: On Wed, Dec 12, 2001 at 04:22:05PM +1030, Greg Lehey wrote: On Tuesday, 11 December 2001 at 3:11:21 +0100, Bernd Walter wrote: striped: If you have 512byte stripes and have 2 disks. You access 64k which is put into 2 32k

Re: Vinum write performance (was: RAID performance (was: cvs commit: src/sys/kern subr_diskmbr.c))

2001-12-12 Thread Bernd Walter
On Thu, Dec 13, 2001 at 12:47:53PM +1030, Greg Lehey wrote: On Thursday, 13 December 2001 at 3:06:14 +0100, Bernd Walter wrote: Currently if we have two writes in two stripes each, all initated before the first finished, the drive has to seek between the two stripes, as the second write