I am also doing a splurge now (different people to start with should show up any submission issues, the will allow SAM/Wahid to do the ongoing tests you might want to test the number of streams in the transfers ( in option ) try values of 1,4,10?
Brian
-----Original Message-----
From: GRIDPP2: Deployment and support of SRM and local storage management [mailto:[log in to unmask]] On Behalf Of Sam Skipsey
Sent: 03 March 2011 11:01
To: [log in to unmask]
Subject: Re: 2G atlas files placed
Hi Alessandra,
On 3 March 2011 10:51, Alessandra Forti <[log in to unmask]> wrote:
> Hi Sam,
>
> weren't you and Wahid going to do it?
>
Fair enough.
I'll get it working sometime this evening - I'm not around this afternoon.
Sam
> 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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