[OpenAFS] forcing and benchmarking the cache scan

Jason Edgecombe jason@rampaginggeek.com
Fri, 18 Mar 2011 21:40:02 -0400


Thanks. I got things squared away. I ran "mke2fs -j" once on my cache 
partition to make the scan faster on boot.


On 03/18/2011 10:44 AM, Derrick Brashear wrote:
> /etc/init.d/openafs-client stop; rm /usr/vice/etc/CacheItems;
> /etc/init.d/openafs-client start
> ?
>
>
> On Fri, Mar 18, 2011 at 10:05 AM, Edgecombe, Jason<jwedgeco@uncc.edu>wrote:
>
>> Hi everyone,
>>
>>
>>
>> I had a server doing a cache scan for over an hour yesterday after
>> upgrading the RAID (mpt2sas) driver on RHEL5.5 64bit. I thought the box
>> hung, so I ran a hard reset and ended up rebuilding it. Iím trying to
>> reproduce and measure the cache scan time with the two different versions of
>> the RAID driver to see if the driver causes an issue, or not. How can I
>> force the client to run a cache scan when I run /etc/init.d/openafs-client
>> restart instead of at boot time?
>>
>>
>>
>> Iím trying the following procedure to benchmark things:
>>
>>
>>
>> fs setcachesize 1
>>
>> fs setcachesize 62048980
>>
>> fs getcachep
>>
>> cd /afs/(some folder)
>>
>> find . -type f | xargs cat>  /dev/null
>>
>> cd /
>>
>> time /etc/init.d/openafs-client restart
>>
>>
>>
>> Details on production box:
>>
>> OS: RedHat Enterprise Linux Server 5.5 (64bit)
>>
>> Hardware: Dell PowerEdge R210 With H200 RAID controller
>>
>> Driver: mp2tsas driver from Dell
>>
>>
>>
>> Details on testing box (my only H200 cards are in production servers):
>>
>> OS: RedHat Enterprise Linux Server 5.5 (64bit)
>>
>> Hardware: Dell PowerEdge R510 With H700 RAID controller
>>
>> Driver: mp2tsas driver from Dell
>>
>>
>>
>> Thanks,
>>
>> Jason
>>
>>
>>
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>>
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>>
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>>
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>>
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>
>