LISTSERV 16.5 - XROOTD-L Archives

Hi Tommaso,

Whether you use xrdcp or TFile::Open does not matter. All of that goes 
through the same logic. So, what you see in xrdcp is what you should 
expect from TFile::Open(). Either test will be valid.

Andy

On Thu, 17 Apr 2014, Tommaso Boccali wrote:

> Ciao Andrew, thanks a lot.
> What worries me is the test I did with
>
> TFile::Open
>
> which seems to be broken as well. Since in CMSSW we use that, in the real
> use case which counts I am afraid we have a problem.
>
> Could you try that? Unfortunately now I add to restart the redirector,
> since I got during the night MANY failures, since a couple of sites are
> already using the redundant setup
>
> tom
>
>
> On Thu, Apr 17, 2014 at 7:09 AM, Andrew Hanushevsky
> <[log in to unmask]>wrote:
>
>> Hi Tommaso,
>>
>> I have check the new client and it works as expected. I couldn't copy the
>> file because I am not authroized but it did find a working redirector.
>> Oddly enough, it also found things in Germany and the like. I assume you
>> redirect upstream? If not, then I need to check with Lukasz how he managed
>> to get to your global redirector.
>>
>> I agree that the old client is broken. I don't know when that regression
>> happened as it worked the last time I checked this. The  question is
>> whether we should fix the old client since with release 4 the old client is
>> deprecated and no one would actually use it even if it got fixed. R4 is due
>> out in the middle of May.
>>
>> Andy
>>
>>
>>
>> On Thu, 17 Apr 2014, Tommaso Boccali wrote:
>>
>>  ciao Andrew!
>>> I think you do not need at this level, because by choice we have left the
>>> redirectors w/o authentication.
>>>
>>> So if you look to a command like
>>>
>>> xrdcp -d 10 root://
>>> xrootd-cms.infn.it//store/data/Run2013A/MinimumBias/
>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>> BE02-003048D2BC62.root.
>>>
>>>> &log
>>>>
>>>
>>> (after a voms-proxy-destroy in my case) I still see the usual fixed order
>>>
>>> -bash-3.2$ grep ShowUrls log
>>> 140417 01:12:15 001 Xrd: ShowUrls: The converted URLs count is 2
>>> 140417 01:12:15 001 Xrd: ShowUrls: URL n.1: root://
>>> xrootd-redic.pi.infn.it:1094//store/data/Run2013A/
>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>> C67B-E211-BE02-003048D2BC62.root
>>> .
>>> 140417 01:12:15 001 Xrd: ShowUrls: URL n.2: root://
>>> xrootd.ba.infn.it:1094//store/data/Run2013A/MinimumBias/
>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>> BE02-003048D2BC62.root
>>> .
>>> 140417 01:12:15 001 Xrd: ShowUrls: The converted URLs count is 2
>>> 140417 01:12:15 001 Xrd: ShowUrls: URL n.1: root://
>>> xrootd-redic.pi.infn.it:1094//store/data/Run2013A/
>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>> C67B-E211-BE02-003048D2BC62.root
>>> .
>>> 140417 01:12:15 001 Xrd: ShowUrls: URL n.2: root://
>>> xrootd.ba.infn.it:1094//store/data/Run2013A/MinimumBias/
>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>> BE02-003048D2BC62.root
>>> .
>>> 140417 01:12:20 001 Xrd: ShowUrls: The converted URLs count is 2
>>> 140417 01:12:20 001 Xrd: ShowUrls: URL n.1: root://
>>> xrootd-redic.pi.infn.it:1094//store/data/Run2013A/
>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>> C67B-E211-BE02-003048D2BC62.root
>>> .
>>> 140417 01:12:20 001 Xrd: ShowUrls: URL n.2: root://
>>> xrootd.ba.infn.it:1094//store/data/Run2013A/MinimumBias/
>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>> BE02-003048D2BC62.root
>>> .
>>> ...
>>>
>>> eventually is this would not fail, then you would get an error when trying
>>> to access the real file, but at least in my case I "die" before.
>>>
>>> Of course for this to make sense I need to leave off one of the
>>> redirectors
>>> (xrootd-redic.pi.infn.it).  Also, you can test the same behavior with
>>>
>>> xrdcp -d 10 root://xrootd-redic.pi.infn.it,
>>> xrootd.ba.infn.it//store/data/Run2013A/MinimumBias/RECO/
>>> PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-BE02-003048D2BC62.root
>>> .
>>>
>>>> & log1 &
>>>>
>>>
>>> again, I get
>>>
>>> -bash-3.2$ grep ShowUrls log1
>>> 140417 01:15:59 001 Xrd: ShowUrls: The converted URLs count is 2
>>> 140417 01:15:59 001 Xrd: ShowUrls: URL n.1: root://
>>> xrootd-redic.pi.infn.it:1094//store/data/Run2013A/
>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>> C67B-E211-BE02-003048D2BC62.root
>>> .
>>> 140417 01:15:59 001 Xrd: ShowUrls: URL n.2: root://
>>> xrootd.ba.infn.it:1094//store/data/Run2013A/MinimumBias/
>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>> BE02-003048D2BC62.root
>>> .
>>> 140417 01:15:59 001 Xrd: ShowUrls: The converted URLs count is 2
>>> 140417 01:15:59 001 Xrd: ShowUrls: URL n.1: root://
>>> xrootd-redic.pi.infn.it:1094//store/data/Run2013A/
>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>> C67B-E211-BE02-003048D2BC62.root
>>> .
>>> 140417 01:15:59 001 Xrd: ShowUrls: URL n.2: root://
>>> xrootd.ba.infn.it:1094//store/data/Run2013A/MinimumBias/
>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>> BE02-003048D2BC62.root
>>> .
>>> 140417 01:16:04 001 Xrd: ShowUrls: The converted URLs count is 2
>>> 140417 01:16:04 001 Xrd: ShowUrls: URL n.1: root://
>>> xrootd-redic.pi.infn.it:1094//store/data/Run2013A/
>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>> C67B-E211-BE02-003048D2BC62.root
>>> .
>>> 140417 01:16:04 001 Xrd: ShowUrls: URL n.2: root://
>>> xrootd.ba.infn.it:1094//store/data/Run2013A/MinimumBias/
>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>> BE02-003048D2BC62.root
>>> .
>>> ...
>>>
>>>
>>> I try and leave the redirector OFF for the night, if you want to try. I
>>> hope I will not get big side effects  :(
>>>
>>> tom
>>>
>>>
>>>
>>>
>>>
>>> On Thu, Apr 17, 2014 at 12:33 AM, Andrew Hanushevsky <[log in to unmask]
>>>> wrote:
>>>
>>>    Hi Tommaso,
>>>>
>>>> So I need a certificate to reproduce your test from here? I also can
>>>> supply you with access to xrdcopy if you happen to have AFS installed.
>>>>
>>>> Andy
>>>>
>>>>  *From:* Tommaso Boccali <[log in to unmask]>
>>>> *Sent:* Tuesday, April 15, 2014 10:02 PM
>>>> *To:* Andrew Hanushevsky <[log in to unmask]>
>>>> *Cc:* [log in to unmask]
>>>> *Subject:* Re: problem with aliased redirectors
>>>>
>>>>
>>>>  ciao Andrew!
>>>> I have problems checking with xrdcopy, since that is not distributed with
>>>> CMS software, I have to find a way. For the moment, another hint
>>>> something
>>>> is not ok in the randomization in xrdcp:
>>>>
>>>> I tried (with xrootd.ba.infn.it ON and xrootd-redic.pi.infn.it OFF)
>>>>
>>>>  xrdcp -d 10 root://xrootd-redic.pi.infn.it,xrootd.ba.infn.it
>>>> //store/data/Run2013A/MinimumBias/RECO/PromptReco-
>>>> v1/000/212/188/00000/6C246B92-C67B-E211-BE02-003048D2BC62.root<
>>>> http://xrootd-cms.infn.it//store/data/Run2013A/
>>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>>> C67B-E211-BE02-003048D2BC62.root>.
>>>>
>>>>
>>>> so putting explicitly the list of servers in the command line.
>>>> So, this always fails (xrootd-redic.pi.infn.it is always tried, 8 times,
>>>> and the other never reached).
>>>>
>>>> Instead
>>>>
>>>>  xrdcp -d 10 root://xrootd.ba.infn.it,xrootd-redic.pi.infn.it
>>>> //store/data/Run2013A/MinimumBias/RECO/PromptReco-
>>>> v1/000/212/188/00000/6C246B92-C67B-E211-BE02-003048D2BC62.root<
>>>> http://xrootd-cms.infn.it//store/data/Run2013A/
>>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>>> C67B-E211-BE02-003048D2BC62.root>.
>>>>
>>>>
>>>> always works at the first attempt.
>>>>
>>>> In any case, I think we basically care about the behavior of
>>>> TFile::Open()
>>>> from our SW, not direct copy commands
>>>>
>>>>
>>>> This for example should not fail:
>>>>
>>>>  root [5] TFile* ii = TFile::Open("root://xrootd-redic.pi.infn.it,
>>>> xrootd.ba.infn.it//store/data/Run2013A/MinimumBias/RECO/
>>>> PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-BE02-
>>>> 003048D2BC62.root
>>>> ")
>>>>
>>>> 140416 06:58:05 001 Xrd: Connect: can't open connection to [
>>>> xrootd-redic.pi.infn.it:1094]
>>>> 140416 06:58:05 001 Xrd: XrdNetFile: Error creating logical connection to
>>>> xrootd-redic.pi.infn.it:1094
>>>> Error in <TXNetFile::CreateXClient>: open attempt failed on root://
>>>> xrootd-redic.pi.infn.it,
>>>> xrootd.ba.infn.it//store/data/Run2013A/MinimumBias/RECO/
>>>> PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-BE02-
>>>> 003048D2BC62.root
>>>>
>>>> (does not seem to give a second try to the other server)
>>>>
>>>> and this seems even worse:
>>>>
>>>>  root [7] TFile* ii = TFile::Open("root://
>>>> xrootd-cms.infn.it//store/data/Run2013A/MinimumBias/
>>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>>> BE02-003048D2BC62.root
>>>> ")
>>>>
>>>> 140416 06:59:11 001 Xrd: Connect: can't open connection to [
>>>> xrootd-redic.pi.infn.it:1094]
>>>> 140416 06:59:11 001 Xrd: XrdNetFile: Error creating logical connection to
>>>> xrootd-redic.pi.infn.it:1094
>>>> Error in <TXNetFile::CreateXClient>: open attempt failed on root://
>>>> xrootd-cms.infn.it//store/data/Run2013A/MinimumBias/
>>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>>> BE02-003048D2BC62.root
>>>>
>>>> so not even a second attempt is tried ....
>>>>
>>>> this instead works
>>>>
>>>>  root [1] TFile* ii = TFile::Open("root://xrootd.ba.infn.it,
>>>> xrootd-redic.pi.infn.it//store/data/Run2013A/
>>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>>> C67B-E211-BE02-003048D2BC62.root
>>>> ")
>>>>
>>>> 140416 07:01:18 001 Xrd: GoToAnotherServer: Going to:
>>>> t2-cms-xrootd01.desy.de:1094
>>>> 140416 07:01:18 001 Xrd: GoToAnotherServer: Going to:
>>>> dcache-cms-xrootd.desy.de:1094
>>>> 140416 07:01:18 001 Xrd: GoToAnotherServer: Going to:
>>>> 131.169.191.230:20982
>>>>
>>>> tommaso
>>>>
>>>>
>>>>
>>>>
>>>> On Tue, Apr 15, 2014 at 11:08 PM, Andrew Hanushevsky <[log in to unmask]
>>>>> wrote:
>>>>
>>>>    Hi Tommaso,
>>>>>
>>>>> DNS round-robin, while it looks good in small scale tests, rarely works
>>>>> all that well. The reason is that DNS round-robins whenever a look-up is
>>>>> made regardless of the reason for the lookup. With a of clients that may
>>>>> very well lead to suboptimal ordering. So, the xrootd client gets all of
>>>>> the addresses and uses an algorithm that better spreads the access.
>>>>>
>>>>> As for why xrdcp didnÿÿt go after the seconds entry is mysterious but I
>>>>> would say itÿÿs a bug. Could you try the same test again but use
>>>>> xrdcopy?
>>>>> Thatÿÿs the new version of the client.
>>>>>
>>>>> Andy
>>>>>
>>>>>  *From:* Tommaso Boccali <[log in to unmask]>
>>>>> *Sent:* Tuesday, April 15, 2014 3:48 AM
>>>>> *To:* [log in to unmask]
>>>>> *Subject:* Re: problem with aliased redirectors
>>>>>
>>>>>
>>>>>  as additional info, the DNS seems to do well its RR job: from the same
>>>>> machine
>>>>>
>>>>>  -bash-3.2$ host xrootd-cms.infn.it
>>>>> xrootd-cms.infn.it has address 193.205.76.83
>>>>> xrootd-cms.infn.it has address 90.147.66.75
>>>>> -bash-3.2$ host xrootd-cms.infn.it
>>>>> xrootd-cms.infn.it has address 90.147.66.75
>>>>> xrootd-cms.infn.it has address 193.205.76.83
>>>>> -bash-3.2$ host xrootd-cms.infn.it
>>>>> xrootd-cms.infn.it has address 90.147.66.75
>>>>> xrootd-cms.infn.it has address 193.205.76.83
>>>>> -bash-3.2$ host xrootd-cms.infn.it
>>>>> xrootd-cms.infn.it has address 90.147.66.75
>>>>> xrootd-cms.infn.it has address 193.205.76.83
>>>>> -bash-3.2$ host xrootd-cms.infn.it
>>>>> xrootd-cms.infn.it has address 193.205.76.83
>>>>> xrootd-cms.infn.it has address 90.147.66.75
>>>>>
>>>>> So each time the order returned is random, in case xrootd would need to
>>>>> depend on this
>>>>>
>>>>> BUT: inside xrdcp log, the order seems always to be the same (*)
>>>>>
>>>>> is some caching done inside xrdcp killing the RR?
>>>>>
>>>>> tom
>>>>>
>>>>> *:
>>>>>
>>>>>  -bash-3.2$ grep DNS log
>>>>> 140415 12:32:21 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:21 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:21 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:21 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:21 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:21 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:26 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:26 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:26 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:31 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:31 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:31 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:36 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:36 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:36 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:41 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:41 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:41 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:46 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:46 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:46 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:51 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:51 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:51 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:32:56 001 Xrd: ConvertDNSAlias: resolving xrootd-cms.infn.it
>>>>> 140415 12:32:56 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:32:56 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>>
>>>>>  On 15 Apr 2014, at 12:33, Tommaso Boccali <[log in to unmask]>
>>>>> wrote:
>>>>>
>>>>>  Ciao,
>>>>> as from a previous discussion, we have setup an aliased DNS xrootd
>>>>> redirector,
>>>>>
>>>>> which is
>>>>>
>>>>>  -bash-3.2$ host xrootd-cms.infn.it
>>>>> xrootd-cms.infn.it has address 90.147.66.75
>>>>> xrootd-cms.infn.it has address 193.205.76.83
>>>>>
>>>>> I was playing with some crash tests, and I do not get the result.
>>>>>
>>>>> So: I switched off the redirector 193.205.76.83, while keeping it into
>>>>> the alias, and I issued a
>>>>>
>>>>> xrdcp -d 10 root://
>>>>> xrootd-cms.infn.it//store/data/Run2013A/MinimumBias/
>>>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>>>> BE02-003048D2BC62.root.
>>>>>
>>>>> I was assuming that the client would have recognized the alias, and
>>>>> eventually tried a second host if the first was not available.
>>>>>
>>>>> In the log ( https://www.dropbox.com/s/zmp9uyreqm4qwhg/xrootd.log )
>>>>> I see eventually the client recognizes the situation:
>>>>>
>>>>>
>>>>>   140415 12:25:11 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd-redic.pi.infn.it with addr 193.205.76.83
>>>>> 140415 12:25:11 001 Xrd: ConvertDNSAlias: found host
>>>>> xrootd.ba.infn.itwith addr 90.147.66.75
>>>>>
>>>>> 140415 12:25:11 001 Xrd: ShowUrls: The converted URLs count is 2
>>>>> 140415 12:25:11 001 Xrd: ShowUrls: URL n.1: root://
>>>>> xrootd-redic.pi.infn.it:1094//store/data/Run2013A/
>>>>> MinimumBias/RECO/PromptReco-v1/000/212/188/00000/6C246B92-
>>>>> C67B-E211-BE02-003048D2BC62.root
>>>>> .
>>>>> 140415 12:25:11 001 Xrd: ShowUrls: URL n.2: root://
>>>>> xrootd.ba.infn.it:1094//store/data/Run2013A/MinimumBias/
>>>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>>>> BE02-003048D2BC62.root
>>>>> .
>>>>>
>>>>> but then
>>>>>
>>>>>  140415 12:25:46 001 Xrd: Open: Trying to connect to
>>>>> xrootd-redic.pi.infn.it:1094. Connect try 8
>>>>> 140415 12:25:46 001 Xrd: XrdClientConn: Trying to connect to
>>>>> 193.205.76.83:1094
>>>>> 140415 12:25:46 001 Xrd: Connect: Creating a logical connection...
>>>>> 140415 12:25:46 001 Xrd: Connect: Physical connection not found.
>>>>> Creating
>>>>> a new one...
>>>>> 140415 12:25:46 001 Xrd: Connect: Connecting to [
>>>>> xrootd-redic.pi.infn.it:1094]
>>>>> 140415 12:25:46 001 Xrd: ClientSock::TryConnect_low: Trying to connect
>>>>> to
>>>>> xrootd-redic.pi.infn.it(193.205.76.83):1094 Windowsize=0 Timeout=120
>>>>> 140415 12:25:46 001 Xrd: ClientSock::TryConnect_low: Connection
>>>>> toxrootd-redic.pi.infn.it:1094 failed. (-1)
>>>>> 140415 12:25:46 001 Xrd: Connect: can't open connection to [
>>>>> xrootd-redic.pi.infn.it:1094]
>>>>> 140415 12:25:46 001 Xrd: PhyConnection: Disconnecting socket...
>>>>> 140415 12:25:46 001 Xrd: Connect: Connect(xrootd-redic.pi.infn.it,
>>>>> 1094)
>>>>> returned -1
>>>>> 140415 12:25:46 001 Xrd: XrdNetFile: Error creating logical connection
>>>>> to
>>>>> xrootd-redic.pi.infn.it:1094
>>>>> 140415 12:25:46 001 Xrd: Open: Disconnecting.
>>>>> 140415 12:25:46 001 Xrd: Cache: Cache Status --------------------------
>>>>> 140415 12:25:46 001 Xrd: Cache: --------------------------------------
>>>>> fTotalByteCount = 0
>>>>> Last server error 10000 ('')
>>>>> Error accessing path/file for root://
>>>>> xrootd-cms.infn.it//store/data/Run2013A/MinimumBias/
>>>>> RECO/PromptReco-v1/000/212/188/00000/6C246B92-C67B-E211-
>>>>> BE02-003048D2BC62.root
>>>>>
>>>>> so no attempt is done on the other. What is wrong here? all in all it
>>>>> tries 8 times to connect to the SAME server, and 0 times to the other
>>>>> ...
>>>>>
>>>>>
>>>>> thanks a lot
>>>>>
>>>>> tom
>>>>>
>>>>> --
>>>>> Tommaso Boccali
>>>>> INFN Pisa
>>>>>
>>>>> ------------------------------
>>>>>
>>>>>
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>>>>>
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>>>>>
>>>>>
>>>>>
>>>>> ------------------------------
>>>>>
>>>>>
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>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Tommaso Boccali
>>>> INFN Pisa
>>>>
>>>> ------------------------------
>>>>
>>>>
>>>> Use REPLY-ALL to reply to list
>>>>
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>>>>
>>>>
>>>
>>>
>>> --
>>> Tommaso Boccali
>>> INFN Pisa
>>>
>>
>
>
> -- 
> Tommaso Boccali
> INFN Pisa
>
> ########################################################################
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