Hi Alessandra,
On 3 March 2011 10:37, Alessandra Forti <[log in to unmask]> wrote:
> Hi Sam,
>
> I think we should do a copy every hour. If we think it is too much doing all
> the T2 <-> T1 every hour we can do one T1 every hour to/from each T2. In
> this way we will have at least a measure for every T1 every 3 hours.
>
I'd tend to agree, in general, with this.
> I'd also take care of deleting additional copies systematically since we are
> not using any catalogue.
>
That's definitely a good idea.
> Is that ok with you?
>
Are you going to do this centrally, or do you want us to handle the
GLA transfers, Chris to handle QMUL etc, or?
(I did some more transfers for RAL and SARA to get better statistics -
our values are about 50MB/s from RAL, and around 5MB/s from SARA,
averaged over 3 transfers each.)
Sam
> cheers
> alessandra
>
>
> On 03/03/2011 10:08, Sam Skipsey wrote:
>>
>> Hi Alessandra,
>>
>> On 2 March 2011 17:56, Alessandra Forti<[log in to unmask]> wrote:
>>>
>>> Hi Sam and Wahid,
>>>
>>> as agreed during the meeting I put 2GB files in
>>>
>>>
>>> srm://dcsrm.usatlas.bnl.gov:8443/srm/managerv2?SFN=/pnfs/usatlas.bnl.gov/atlasscratchdisk/user/uk/sonar-2G
>>
>> Works for me - copies at (around the sonar test value of) 1.1MB/s to
>> GLA. Interestingly, the instantaneous rates that gridftp reports for
>> these transfers are multiples of 512KB/s, which I've not seen before
>> (the 1.1MB/s is an integral over 512,1024, 1536 and 2048 KB/s
>> samples). This implies something about the rate limits on the
>> individual channels bonded to provide our link (probably at the BNL
>> end) - there are at least 4 links, each rate-limited to 512KB/s.
>>
>>>
>>> srm://srm.grid.sara.nl/pnfs/grid.sara.nl/data/atlas//atlasscratchdisk/users/uk/sonar-2G
>>
>> Works for me - copies at (around 8 times Sonar) 4.4MB/s to GLA (only
>> one sample here, so...)
>>
>>>
>>> srm://srm-atlas.gridpp.rl.ac.uk/castor/ads.rl.ac.uk/prod/atlas/scratch/atlasscratchdisk/users/uk/sonar-2G
>>
>> Works for me - copies at (20x ! Sonar) 58MB/s to GLA (only one sample
>> here, so..)
>>
>>>
>>> srm://bohr3226.tier2.hep.manchester.ac.uk/dpm/tier2.hep.manchester.ac.uk/home/atlas/atlasscratchdisk/users/uk/sonar-2G
>>> srm://se03.esc.qmul.ac.uk/atlas/atlasscratchdisk/users/uk/sonar-2G
>>>
>>> srm://svr018.gla.scotgrid.ac.uk:8446/srm/managerv2?SFN=/dpm/gla.scotgrid.ac.uk/home/atlas/atlasscratchdisk/users/uk/sonar-2G
>>>
>> not tried the copies the other way yet...
>>
>> Sam
>>
>>> Let me know if they are ok for you.
>>>
>>> cheers
>>> alessandra
>>>
>
>
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