Hi I use suse super and i experimented a bit and found out that using a flashdisk for a swap partition significantly improves performance. +set /cat/proc/sys/vm/swappiness a high value like 80
a must try .
Steven
On 6/8/06, Steven Joseph stevenjose@gmail.com wrote:
Hi I use suse super and i experimented a bit and found out that using a flashdisk for a swap partition significantly improves performance.
I'd imagine this is but natrual. You are replacing to a superfast memory access (much like our good old RAM) for a slow mechanical harddisk. I'm not really surprised with this.
Harshal Vaidya http://www.lakhpatipage.com
On 08/06/06 20:31 -0500, Harshal Vaidya wrote:
On 6/8/06, Steven Joseph stevenjose@gmail.com wrote:
Hi I use suse super and i experimented a bit and found out that using a flashdisk for a swap partition significantly improves performance.
I'd imagine this is but natrual. You are replacing to a superfast memory access (much like our good old RAM) for a slow mechanical harddisk. I'm not really surprised with this.
Really. How do flash write speeds compare with spinning media? IDE, SATA and SCSI please.
Devdas Bhagat
On Friday 09 June 2006 07:01 am, Harshal Vaidya wrote:
On 6/8/06, Steven Joseph stevenjose@gmail.com wrote:
Hi I use suse super and i experimented a bit and found out that using a flashdisk for a swap partition significantly improves performance.
I'd imagine this is but natrual. You are replacing to asuperfast memory access (much like our good old RAM) for a slow mechanical harddisk. I'm not really surprised with this.
Very "poor" (2~8MB/sec) write speeds. But read is 4MB/sec (12 MB in newer ones) sustained. seek time is "zero".
On Fri, 2006-06-09 at 03:13 +0530, Steven Joseph wrote:
Hi I use suse super and i experimented a bit and found out that using a flashdisk for a swap partition significantly improves performance. +set /cat/proc/sys/vm/swappiness a high value like 80
Presuming your system load requires use of swap space, are the present day flash drives designed to handle high volume of writes?
-- Arun Khan (knura at yahoo dot com) If you think the problem is bad now, just wait until we've solved it. -- Arthur Kasspe
On Saturday 10 June 2006 01:13 am, Arun K. Khan wrote:
On Fri, 2006-06-09 at 03:13 +0530, Steven Joseph wrote:
Hi I use suse super and i experimented a bit and found out that using a flashdisk for a swap partition significantly improves performance. +set /cat/proc/sys/vm/swappiness a high value like 80
Presuming your system load requires use of swap space, are the present day flash drives designed to handle high volume of writes?
1 million. Using as swap with high loads is a very bad idea.
1 million. Using as swap with high loads is a very bad idea.
The flash memory may last a few days only. 1 million write / erase cycles is very optimistic, and depends on quality. Cheap USB drive will last 100,000 cycles only. Writing once a sec will eat up 86400 cycles. So the best drive will last 12 days.
Best Regards,
Mukund Deshmukh. Beta Computronics Pvt Ltd 10/1, IT Park, Parsodi, Nagpur-440022 Cell - 9422113746
On 6/10/06, Mukund Deshmukh betacomp_ngp@sancharnet.in wrote:
Cheap USB drive will last 100,000 cycles only.
Just to know. how does a normal flash memory and 'flash' hard drives differ in their make.
Regards
Cheap USB drive will last 100,000 cycles only.
Just to know. how does a normal flash memory and 'flash' hard drives
differ
in their make.
Theoretically, there is no difference. But cheap USB drive use cheaper flash memory and they may not stand more than 100,000 cycles.
Try one for your self.
Best Regards,
Mukund Deshmukh. Beta Computronics Pvt Ltd 10/1, IT Park, Parsodi, Nagpur-440022 Cell - 9422113746
On 6/12/06, Mukund Deshmukh betacomp_ngp@sancharnet.in wrote:
Try one for your self.
yeah. i bought one recently :-) thats why asked !!
On Sunday 11 June 2006 08:24 am, Dileep M. Kumar wrote:
On 6/10/06, Mukund Deshmukh betacomp_ngp@sancharnet.in wrote:
Cheap USB drive will last 100,000 cycles only.
Just to know. how does a normal flash memory and 'flash' hard drives differ in their make.
A flash drive has an ide interface and software to translate the c/h/s to address:offset. Internally it is plain old flash with some ram as cache. Some wear levelling algorithm is also built in - which can play havoc if u loose power at the wrong time.
On Monday 12 June 2006 10:44, jtd wrote:
On Sunday 11 June 2006 08:24 am, Dileep M. Kumar wrote:
On 6/10/06, Mukund Deshmukh betacomp_ngp@sancharnet.in wrote:
Cheap USB drive will last 100,000 cycles only.
Just to know. how does a normal flash memory and 'flash' hard drives differ in their make.
A flash drive has an ide interface and software to translate the c/h/s to address:offset. Internally it is plain old flash with some ram as cache. Some wear levelling algorithm is also built in - which can play havoc if u loose power at the wrong time.
Did some research ... turns out
flash disks dont last ... (limited writes) .... the leveling algo distributes the writes among a large group of mem cells.
I found out using hdparm -i that the timed reads were significantly faster on the hdd compared with the hdd ... Maybe the spin delay might be eliminated in case of flash.
Solution slax toram http://www.slax.org/
How about using tmpfs or ramfs ... to create a fast access folder. improvement possible during compiles ... copy the files to a ramfs/shmfs dir and do the build there.
i've made a little incomplete script ... see attach
[S,s]teven
-
Arun K. Khan -
Devdas Bhagat -
Dileep M. Kumar -
Harshal Vaidya -
jtd -
Mukund Deshmukh -
Steven Joseph