Bug1: Maybe im missing something here, why arent reads just as fast as writes?
The cynic in me suggests that the RAID driver has to wait for the
information to be read off the disks, but it doesn't have to wait for the
writes to complete before returning, but I haven't read the code.
-HJC
On Tue, Jun 13, 2000 at 04:51:46AM +1000, bug1 wrote:
> Maybe im missing something here, why arent reads just as fast as writes?
I note the same on a 2 way IDE RAID-1 device, with both disks on a separate
bus.
Regards,
bert hubert
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> -Original Message-
> From: bug1 [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, June 13, 2000 10:39 AM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: Re: Benchmarks, raid0 performance, 1,2,3,4 drives
>
> Ingo Molnar wrote:
> >
> > could
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Hello,
Just to let you know, I also see very similar IDE-RAID0 performance
problems:
I have RAID0 with two 30G DiamondMax (Maxtor) ATA-66 drives connected to
a Promise Ultra66 controller.
I am using kernel 2.4.0-test1-
Ingo Molnar wrote:
>
> could you send me your /etc/raidtab? I've tested the performance of 4-disk
> RAID0 on SCSI, and it scales perfectly here, as far as hdparm -t goes.
> (could you also send the 'hdparm -t /dev/md0' results, do you see a
> degradation in those numbers as well?)
>
> it could e
Adrian Head wrote:
>
> I have seen people complain about simular issues on the kernel mailing
> list so maybe there is an actual kernel problem.
>
> What I have always wanted to know but haven't tested yet is to test raid
> performance with and without the noatime attribute in /etc/fstab I
> th
I have seen people complain about simular issues on the kernel mailing
list so maybe there is an actual kernel problem.
What I have always wanted to know but haven't tested yet is to test raid
performance with and without the noatime attribute in /etc/fstab I
think that when Linux reads a file
Ingo Molnar wrote:
>
> could you send me your /etc/raidtab? I've tested the performance of 4-disk
> RAID0 on SCSI, and it scales perfectly here, as far as hdparm -t goes.
> (could you also send the 'hdparm -t /dev/md0' results, do you see a
> degradation in those numbers as well?)
>
> it could e
could you send me your /etc/raidtab? I've tested the performance of 4-disk
RAID0 on SCSI, and it scales perfectly here, as far as hdparm -t goes.
(could you also send the 'hdparm -t /dev/md0' results, do you see a
degradation in those numbers as well?)
it could either be some special thing in yo
