default I/O scheduler should be change from CFQ to deadline
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Ubuntu |
Opinion
|
Wishlist
|
Unassigned |
Bug Description
i think that the default I/O scheduler
should be change from CFQ to deadline
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i have test CFQ and deadline I/O scheduler
on a DELL Latitude 120L with 1GB of RAM and 40GB hard drive
with EXT4 filesystem and GPT with both I/O schedulers
and Found that deadline I/O scheduler is the fastest
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also tested
EXT3 with MBR and deadline I/O scheduler
EXT3 with GPT and deadline I/O scheduler
EXT4 with MBR and deadline I/O scheduler
EXT4 with GPT and deadline I/O scheduler
EXT4 with MBR and Noop I/O scheduler
EXT4 with GPT and Noop I/O scheduler
-- all are faster with
deadline I/O scheduler -OR- Noop I/O scheduler
ubuntu versions tested - Ubuntu 9.04, Ubuntu 10.04 (LTS), Xubuntu 10.04
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also test both I/O schedulers on two other computers (total of 3 computers)
the deadline I/O scheduler preformed faster then CFQ scheduler
Noop I/O scheduler preformed best ( faster then deadline )
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also went deadline I/O scheduler is put in Grub ( etc/default/grub OR grub.cfg )
the boot speed is increased and desktop speed
OR went deadline I/O scheduler is put in rc.local ( etc/rc.local )
the desktop speed is increased only
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Changed in ubuntu: | |
status: | Opinion → Invalid |
status: | Invalid → Won't Fix |
Changed in ubuntu: | |
importance: | Undecided → Wishlist |
status: | Won't Fix → Opinion |
deadline I/O scheduler is good with both
SSD (solid- state-drives) and HDD (Hard disk drive)
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Source:
http:// tombuntu. com/index. php/2008/ 09/04/four- tweaks- for-using- linux-with- solid-state- drives/
http:// itezer. com/blog/ ubuntu- linux/125- Four_Tweaks_ for_Using_ Ubuntu_ with_SSD. html