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Filesystems, Disks and Memory
optimizing disk performance
Post 22895 by J.P on Wednesday 12th of June 2002 07:15:23 PM
06-12-2002
optimizing disk performance
I have some questions regarding disk perfomance, and what I can do to make it just a little (or much 
) more faster.
From what I've heard the first partitions will be faster than the later ones because tracks at the outer edges of a hard drive platter simply moves faster. But I've also read in a book that most-used partitions should be placed in the middle of a range of partitions. This doesn't make much sense to me.
Does this "put-heavily-accessed-in-the-middle" thing apply to logical partitions?
Should the heavily accessed partition really go in the middle? Even if the first partitions are large in size and later are small, thus leaving the heavily accessed partition "nearer" the center (where the platter moves slower)... ?
Any other suggestions like partition layout, filesystem recommendation etc are highly appreciated
I'm working with a linux system using a server software that does a lot of reading and writing so every bit of speed I can gain is valueable.
Thanks in advance
) more faster.From what I've heard the first partitions will be faster than the later ones because tracks at the outer edges of a hard drive platter simply moves faster. But I've also read in a book that most-used partitions should be placed in the middle of a range of partitions. This doesn't make much sense to me.
Does this "put-heavily-accessed-in-the-middle" thing apply to logical partitions?
Should the heavily accessed partition really go in the middle? Even if the first partitions are large in size and later are small, thus leaving the heavily accessed partition "nearer" the center (where the platter moves slower)... ?
Any other suggestions like partition layout, filesystem recommendation etc are highly appreciated
I'm working with a linux system using a server software that does a lot of reading and writing so every bit of speed I can gain is valueable.
Thanks in advance
Last edited by J.P; 06-12-2002 at 08:21 PM..
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LEARN ABOUT DEBIAN
kpartx
KPARTX(8) Linux Administrator's Manual KPARTX(8) NAME
kpartx - Create device maps from partition tables SYNOPSIS
kpartx [-a | -d | -l] [-v] wholedisk DESCRIPTION
This tool, derived from util-linux' partx, reads partition tables on specified device and create device maps over partitions segments detected. It is called from hotplug upon device maps creation and deletion. OPTIONS
-a Add partition mappings -r Readonly partition mappings -r Read-only partition mappings -d Delete partition mappings -u Update partition mappings -l List partition mappings that would be added -a -p set device name-partition number delimiter -f force creation of mappings; overrides 'no_partitions' feature -g force GUID partition table (GPT) -v Operate verbosely -s Sync mode. Don't return until the partitions are created EXAMPLE
To mount all the partitions in a raw disk image: kpartx -av disk.img This will output lines such as: loop3p1 : 0 20964762 /dev/loop3 63 The loop3p1 is the name of a device file under /dev/mapper which you can use to access the partition, for example to fsck it: fsck /dev/mapper/loop3p1 When you're done, you need to remove the devices: kpartx -d disk.img SEE ALSO
multipath(8) multipathd(8) hotplug(8) AUTHORS
This man page was assembled By Patrick Caulfield for the Debian project. From documentation provided by the multipath author Christophe Varoqui, <christophe.varoqui@opensvc.com> and others. July 2006 KPARTX(8)