On Tuesday November 22, [EMAIL PROTECTED] wrote:
I have already try the all available options, including readahead in all
layer (result in earlyer mails), and chunksize.
But with this settings, i cannot workaround this.
And the result is incomprehensible for me!
The raid0 performance is not
On Sunday December 18, [EMAIL PROTECTED] wrote:
The raid (md) device why dont have scheduler in sysfs?
And if it have scheduler, where can i tune it?
raid0 doesn't do any scheduling.
All it does is take requests from the filesystem, decide which device
they should go do (possibly splitting
- Original Message -
From: Neil Brown [EMAIL PROTECTED]
To: JaniD++ [EMAIL PROTECTED]
Cc: Al Boldi [EMAIL PROTECTED]; linux-raid@vger.kernel.org
Sent: Wednesday, December 21, 2005 2:40 AM
Subject: Re: RAID0 performance question
On Sunday December 18, [EMAIL PROTECTED] wrote
JaniD++ wrote:
For me, the performance bottleneck is cleanly about RAID0 layer used
exactly as concentrator to join the 4x2TB to 1x8TB.
Did you try running RAID0 over nbd directly and found it to be faster?
IIRC, stacking raid modules does need a considerable amount of tuning, and
even then
- Original Message -
From: Al Boldi [EMAIL PROTECTED]
To: JaniD++ [EMAIL PROTECTED]
Cc: linux-raid@vger.kernel.org
Sent: Friday, December 02, 2005 8:53 PM
Subject: Re: RAID0 performance question
JaniD++ wrote:
But the cat /dev/md31 /dev/null (RAID0, the sum of 4 nodes
Hello,
But the cat /dev/md31 /dev/null (RAID0, the sum of 4 nodes) only
makes ~450-490 Mbit/s, and i dont know why
Somebody have an idea? :-)
Try increasing the read-ahead setting on /dev/md31 using 'blockdev'.
network block devices are likely to have latency
look at the cpu consumption.
On 11/26/05, JaniD++ [EMAIL PROTECTED] wrote:
Hello list,
I have searching the bottleneck of my system, and found something what i
cant cleanly understand.
I have use NBD with 4 disk nodes. (raidtab is the bottom of mail)
The cat /dev/nb# /dev/nullmakes ~
performance question
look at the cpu consumption.
On 11/26/05, JaniD++ [EMAIL PROTECTED] wrote:
Hello list,
I have searching the bottleneck of my system, and found something what i
cant cleanly understand.
I have use NBD with 4 disk nodes. (raidtab is the bottom of mail)
The cat /dev
On Sat, 26 Nov 2005, JaniD++ wrote:
Hello, Raz,
Think this is not cpu usage problem. :-)
The system is divided to 4 cpuset, and each cpuset uses only one disknode.
(CPU0-nb0, CPU1-nb1, ...)
Seams to be CPU problem. Which kind of NIC do you have?
CPU2 states: 2.0% user 74.0% system
Hi,
If you don't speak hungarian, forget this sentence:
Beszelsz magyarul? akkor folytathatjuk ugy is.
On Sat, 26 Nov 2005, JaniD++ wrote:
Intel xeon motherboard, intel e1000 x2. (64bit)
But i already write that, if i cut out the raid, and starts the 4 cat at one
time the traffic is rise
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