From: Nicolas Ross
> With iostat, I find that it's almost a write i/o problem. How can I find to
> which files the OS writes ? On OSX boxes, there is a utility called fs_usage
> that can reports any disk activity for a particular process or all
> processes. Is there any utility like this on
Greetings,
On Thu, May 5, 2011 at 2:21 PM, wrote:
> On Wed, May 04, 2011 at 12:17:15PM -0400, Nicolas Ross wrote:
>> Hi !
>>
>> With iostat, I find that it's almost a write i/o problem. How can I find to
>> which files the OS writes ? On OSX boxes, there is a utility called fs_usage
>> that can
On Wed, May 04, 2011 at 12:17:15PM -0400, Nicolas Ross wrote:
> Hi !
>
> I have a server (Centos 5) that is using a pair of SAS drives to store the
> data. (Mail server) They are on an adaptec raid controler with a battery
> backup and write back cache active.
>
> >From time to time, I have sev
On Thursday 05 May 2011 05:24:10 Marcelo Beckmann wrote:
> 2011/5/4 Nicolas Ross :
> > Hi !
> >
> > I have a server (Centos 5) that is using a pair of SAS drives to store
> > the data. (Mail server) They are on an adaptec raid controler with a
> > battery backup and write back cache active.
> >
>
(...)
> This is excellent, and sooo clever... Except that I don't have the
> /proc/*/fdinfo directories. It seems that theses directories appeared in
> 2.6.22, and, since I am in centos5, I only have 2.6.18...
>
> I tested it on SL6 machine, and it works perfectly... Upgrade is not an
> option for
2011/5/4 Nicolas Ross :
> Hi !
>
> I have a server (Centos 5) that is using a pair of SAS drives to store the
> data. (Mail server) They are on an adaptec raid controler with a battery
> backup and write back cache active.
>
> >From time to time, I have sever peak io to those data disks (> 400 to 5
> Just out of curiosity I decided to write a simple script which checks all the
> files from all pids on the system.
>
> Here is what I got:
>http://hydra.azilian.net/scripts/read_fds.pl
>
> The idea is to read all the /proc/PID/fdinfo/ files and check the difference
> in
> the pos lines (the
On Wednesday 04 May 2011 21:01:03 Jorge Fábregas wrote:
> On 05/04/2011 12:17 PM, Nicolas Ross wrote:
> > iotop can points me to wich process, but that doesn't points me to what
> > files are the culprits...
>
> A rough way would be to change to the top-level directory where you
> suspect the file
On 05/04/2011 12:17 PM, Nicolas Ross wrote:
> iotop can points me to wich process, but that doesn't points me to what
> files are the culprits...
A rough way would be to change to the top-level directory where you
suspect the files are being written and perform:
find . -type f -mmin -1 (tha
Hi !
I have a server (Centos 5) that is using a pair of SAS drives to store the
data. (Mail server) They are on an adaptec raid controler with a battery
backup and write back cache active.
>From time to time, I have sever peak io to those data disks (> 400 to 500
iops, > 70 to 100 megs/sec).
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