Hi Sam,
weren't you and Wahid going to do it?
cheers
alessandra
On 03/03/2011 10:43, Sam Skipsey wrote:
> 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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