Hi all,
I'd like to ask whether there is a way to monitor disk seeks. I have an
application where many concurrent readers (>50) sequentially read a
large dataset (>10T) at a fairly low speed (8-10 Mbit/s). I can monitor
read/write ops using iostat, but that doesn't tell me how contiguous the
data
I am not sure you can monitor actual mechanical seeks short
of debugging and interrogating the HDD firmware - because
it is the last responsible logic in the chain of caching, queuing
and issuing actual commands to the disk heads.
For example, a long logical IO spanning several cylinders
would pr
2011-05-19 17:00, Jim Klimov пишет:
I am not sure you can monitor actual mechanical seeks short
of debugging and interrogating the HDD firmware - because
it is the last responsible logic in the chain of caching,
queuing and issuing actual commands to the disk heads.
For example, a long logical I
On 19 May, 2011 - Sa??o Kiselkov sent me these 0,6K bytes:
> Hi all,
>
> I'd like to ask whether there is a way to monitor disk seeks. I have an
> application where many concurrent readers (>50) sequentially read a
> large dataset (>10T) at a fairly low speed (8-10 Mbit/s). I can monitor
> read/w
On 05/19/2011 03:35 PM, Tomas Ögren wrote:
> On 19 May, 2011 - Sa??o Kiselkov sent me these 0,6K bytes:
>
>> Hi all,
>>
>> I'd like to ask whether there is a way to monitor disk seeks. I have an
>> application where many concurrent readers (>50) sequentially read a
>> large dataset (>10T) at a fai
On Thu, May 19, 2011 at 5:35 AM, Sašo Kiselkov wrote:
> I'd like to ask whether there is a way to monitor disk seeks. I have an
> application where many concurrent readers (>50) sequentially read a
> large dataset (>10T) at a fairly low speed (8-10 Mbit/s). I can monitor
> read/write ops using ios
On May 19, 2011, at 5:35 AM, Sašo Kiselkov wrote:
> Hi all,
>
> I'd like to ask whether there is a way to monitor disk seeks. I have an
> application where many concurrent readers (>50) sequentially read a
> large dataset (>10T) at a fairly low speed (8-10 Mbit/s). I can monitor
> read/write ops
On 05/19/2011 07:47 PM, Richard Elling wrote:
> On May 19, 2011, at 5:35 AM, Sašo Kiselkov wrote:
>
>> Hi all,
>>
>> I'd like to ask whether there is a way to monitor disk seeks. I have an
>> application where many concurrent readers (>50) sequentially read a
>> large dataset (>10T) at a fairly lo
Hi,
see the seeksize script on this URL:
http://prefetch.net/articles/solaris.dtracetopten.html
Not used it but looks neat!
cheers Andy.
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On 05/24/2011 03:08 PM, a.sm...@ukgrid.net wrote:
> Hi,
>
> see the seeksize script on this URL:
>
> http://prefetch.net/articles/solaris.dtracetopten.html
>
> Not used it but looks neat!
>
> cheers Andy.
I already did and it does the job just fine. Thank you for your kind
suggestion.
BR,
-
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