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Hi Matevz and Bockjoo,

Thanks for your help with the investigation. Those cmsxrootd-site[1-3].fnal.gov are connected with our dCache and EOS XROOTD doors.

It looks like the following work fine:


1. Without both "-d" and "-m" option:

bash-4.2$ time xrdfs cmsxrootd2.fnal.gov:1094 locate   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root

[2620:6a:0:8420::f8]:1094 Manager Read

[2620:6a:0:8421::243]:1094 Manager Read

[2620:6a:0:8420::f9]:1094 Manager Read


real 0m0.440s

user 0m0.006s

sys 0m0.007s

2.Only with "-m" option:

bash-4.2$ time xrdfs cmsxrootd2.fnal.gov:1094 locate -m   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root

cmsxrootd-site1.fnal.gov:1094 Manager Read

cmsxrootd-site3.fnal.gov:1094 Manager Read

cmsxrootd-site2.fnal.gov:1094 Manager Read


real 0m0.442s

user 0m0.005s

sys 0m0.008s


3. With both "-d" and "-m" option:

bash-4.2$ time xrdfs cmsxrootd2.fnal.gov:1094 locate -d -m   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root

cmsxrootd-site3.fnal.gov:1093 Server Read

cmsxrootd-site2.fnal.gov:1093 Server Read

cmsxrootd-site1.fnal.gov:1093 Server Read


real 1m16.579s

user 0m0.199s

sys 0m0.010s

(Try again)

bash-4.2$time xrdfs cmsxrootd2.fnal.gov:1094 locate -d -m   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root

cmsxrootd-site3.fnal.gov:1093 Server Read

cmsxrootd-site1.fnal.gov:1093 Server Read

cmsxrootd-site2.fnal.gov:1093 Server Read


real 0m1.859s

user 0m0.182s

sys 0m0.013s

-------------

It does NOT work with only "-d" option:


bash-4.2$ time xrdfs cmsxrootd2.fnal.gov:1094 locate -d   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root

[ERROR] Server responded with an error: [3011] No valid location found



real 0m0.763s

user 0m0.009s

sys 0m0.007s

------------

It seems "-d" is a pretty expensive operation. It goes deep to all levels of XRootD redirectors and only stop after reaching all data servers. As you can see, the first time my query with "-d" and "-m" options took more than over 76 seconds to do the requests and the 2nd time the query returned after 1.86 seconds as the results were still in cache.

I have a test setup. It seems "-d" option could work if I reduce one layer of authentication at cmsxrootd-site level, but not sure if this will violate the CMS metadata access policy. I will put this in our test server and see how it goes.

Anyway, it will be good to have xrdfs locate with ONLY "-d" option work. On the other hand, I just looked at your monitoring table. Could you please tell if it is possible to get the info without "-d" option? Also, personally I would use "-m" option to make sure to get the hostnames instead of IP addresses.


Regards,
Yujun





  1.

________________________________
From: Bockjoo Kim <[log in to unmask]>
Sent: Tuesday, September 19, 2023 3:25 AM
To: Matevz Tadel <[log in to unmask]>; Yujun Wu <[log in to unmask]>; Andrew Hanushevsky <[log in to unmask]>
Cc: xrootd-l <[log in to unmask]>; Bockjoo Kim <[log in to unmask]>
Subject: Re: Help with a xrdfs query puzzle with "xrdfs locate -d"

1093 port is served by the dCache door.

Because file locations became imbalanced according to the top level
redirector:

https://bockjoo.web.cern.ch/aaaRedirectorMonitoring.txt-20230912

where one can see the jobs at American sites are redirected to the EU
regional redirectors

instead of the US regional redirector.

xrdfs should work with or without '-d' option, no?

Thanks,

Bockjoo

On 9/19/23 01:58, Matevz Tadel wrote:
> xrdmapc cmsxrootd2.fnal.gov:1094
> 1     Man cmsxrootd-site2.fnal.gov:1094
>             Srv cmsxrootd-site2.fnal.gov:1093
> 1     Man cmsxrootd-site3.fnal.gov:1094
>             Srv cmsxrootd-site3.fnal.gov:1093
>             Srv cmsxrootd-site3.fnal.gov:1092
> 1     Man cmsxrootd-site1.fnal.gov:1094
>             Srv cmsxrootd-site1.fnal.gov:1096
>             Srv cmsxrootd-site1.fnal.gov:1093
> ....
>
> Are those servers dCache doors?
>
> Things also seem to work better without the -d flag. Why are you using -d?
>
> Matevz
>
> On 9/18/23 09:46, Yujun Wu wrote:
>> Hi Andrew,
>>
>> Good morning.
>>
>> Thanks again for your help. All the client and server hosts have both IPv4 and
>> IPv6 addresses. When querying the cmsxrootd-site1.fnal.gov redirector directly.
>> I get:
>>
>> bash-4.2$ date; /usr/bin/xrdfs cmsxrootd-site1.fnal.gov:1094 locate -d
>>   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:09:30 CEST 2023
>> cmsxrootd-site1.fnal.gov:1093 Server Read
>> bash-4.2$ date; /usr/bin/xrdfs cmsxrootd-site1.fnal.gov:1094 locate -d -m
>>   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:09:40 CEST 2023
>> cmsxrootd-site1.fnal.gov:1093 Server Read
>> Both queries with/without "-m" option return hostname.
>>
>> ********
>> Also, for your info. Our cmsxrootd-site1.fnal.gov redirector at Port 1094 is
>> basically a manager for both cmsd and xrootd with two redirectors registered
>> with it:
>> one at Port 1093 and other at Port 1092 (their roles are: all.role server). If I
>> query them directly, I get:
>>
>> bash-4.2$ date; /usr/bin/xrdfs cmsxrootd-site1.fnal.gov:1093 locate -d
>>   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:09:57 CEST 2023
>> [::131.225.205.75]:1093 Server ReadWrite
>>
>> bash-4.2$ date; /usr/bin/xrdfs cmsxrootd-site1.fnal.gov:1093 locate -d -m
>>   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:10:07 CEST 2023
>> cmsxrootd-site1.fnal.gov:1093 Server ReadWrite
>> The first one returns IP address without "-m" optioin and 2^nd  one returns
>> hostname.
>> ---------------------------------------------------------------------------------------
>> Then, cmsxrootd-site1.fnal.gov manager registers with cmsxrootd.fnal.gov (An
>> alias for xrootd.unl.edu and cmsxrootd2.fnal.gov):
>> all.manager cmsxrootd-site1.fnal.gov:1213
>> all.manager meta all cmsxrootd.fnal.gov+:1213
>>
>> bash-4.2$ host cmsxrootd.fnal.gov
>> cmsxrootd.fnal.gov has address 131.225.184.17 (cmsxrootd2.fnal.gov)
>> cmsxrootd.fnal.gov has address 129.93.239.131(xrootd.unl.edu)
>> cmsxrootd.fnal.gov has IPv6 address
>> 2600:900:6:1101:5054:ff:fe00:70cb(xrootd.unl.edu)
>> cmsxrootd.fnal.gov has IPv6 address 2620:6a:0:187::184:17(cmsxrootd2.fnal.gov
>>
>>
>> bash-4.2$ date; /usr/bin/xrdfs cmsxrootd2.fnal.gov:1094 locate -d -m
>> /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:35:26 CEST 2023
>> cmsxrootd-site2.fnal.gov:1093 Server Read
>> cmsxrootd-site1.fnal.gov:1093 Server Read
>> cmsxrootd-site3.fnal.gov:1093 Server Read
>> bash-4.2$ date; /usr/bin/xrdfs cmsxrootd2.fnal.gov:1094 locate -d
>>   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:35:36 CEST 2023
>> [ERROR] Server responded with an error: [3011] No valid location found
>>
>> The weirdest part is: xrootd.unl.edu returns the same result with and without "-m":
>> bash-4.2$ date; /usr/bin/xrdfs xrootd.unl.edu:1094 locate -d
>>   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:40:25 CEST 2023
>> cmsxrootd-site1.fnal.gov:1093 Server Read
>> cmsxrootd-site2.fnal.gov:1093 Server Read
>> cmsxrootd-site3.fnal.gov:1093 Server Read
>> bash-4.2$ date; /usr/bin/xrdfs xrootd.unl.edu:1094 locate -d -m
>>   /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>> Mon Sep 18 18:40:35 CEST 2023
>> cmsxrootd-site2.fnal.gov:1093 Server Read
>> cmsxrootd-site1.fnal.gov:1093 Server Read
>> cmsxrootd-site3.fnal.gov:1093 Server Read
>> ------------------------------------------------------------------
>>
>> This happens even after I put xrootd.unl.edu XRootD configuration file on
>> cmsxrootd2.fnal.gov.
>>
>> Could you please advise what could be the cause on this? Or, if there is an
>> option at server side that could force "-m" behavior? Thanks again for your help.
>>
>>
>> Regards,
>> Yujun
>>
>>
>> --------------------------------------------------------------------------------
>> *From:* Andrew Hanushevsky <[log in to unmask]>
>> *Sent:* Friday, September 15, 2023 11:53 PM
>> *To:* Yujun Wu <[log in to unmask]>
>> *Subject:* Re: Help with a xrdfs query puzzle with "xrdfs locate -d"
>>
>> One more thing try doing a locate against cmsxrootd-site1.fnal.gov:1094
>> which in theory has the file.
>>
>> On Sat, 16 Sep 2023, Yujun Wu wrote:
>>
>>> Hi Andrew,
>>>
>>> Thank you for your help. Currently, CMS XRootD redirectors only allow access with voms proxy from /cms group.
>>>
>>> It seems all the files I tried have this issue. The following are two examples:
>>>
>>>
>>> [enstore@fndca2b ~]$ date; xrdfs cmsxrootd2.fnal.gov:1094 locate -d -m /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>>>
>>> Fri Sep 15 22:41:40 CDT 2023
>>>
>>> cmsxrootd-site3.fnal.gov:1093 Server Read
>>>
>>> cmsxrootd-site1.fnal.gov:1093 Server Read
>>>
>>> cmsxrootd-site2.fnal.gov:1093 Server Read
>>>
>>> [enstore@fndca2b ~]$ date; xrdfs cmsxrootd2.fnal.gov:1094 locate -d  /store/test/xrootd/T1_US_FNAL/store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_2_6_91X_mcRun1_realistic_v2-v1/00000/AE237916-5D76-E711-A48C-FA163EEEBFED.root
>>>
>>> Fri Sep 15 22:41:56 CDT 2023
>>>
>>> [ERROR] Server responded with an error: [3011] No valid location found
>>>
>>>
>>> -------------
>>>
>>> [enstore@fndca2b ~]$ date; xrdfs cmsxrootd2.fnal.gov:1094 locate -d -m /store/test/xrootd/redirector/test-file
>>>
>>> Fri Sep 15 22:42:34 CDT 2023
>>>
>>> cmsxrootd-site3.fnal.gov:1092 Server Read
>>>
>>> cmsxrootd-site1.fnal.gov:1096 Server Read
>>>
>>> [enstore@fndca2b ~]$ date; xrdfs cmsxrootd2.fnal.gov:1094 locate -d  /store/test/xrootd/redirector/test-file
>>>
>>> Fri Sep 15 22:42:45 CDT 2023
>>>
>>> [ERROR] Server responded with an error: [3011] No valid location found
>>>
>>> -------------
>>> For the 2nd file, the log files showed:
>>> ###cmsxrootd2###
>>>
>>> [root@cmsxrootd2 tmp]# tail -n 100000 cmsd.log|grep test-file
>>>
>>> [root@cmsxrootd2 tmp]# tail -n 100000 xrootd.log|grep test-file
>>>
>>> 230915 22:42:34 17939 acc_Audit: enstore.233531:159@fndca2b grant host *@fndca2b.fnal.gov stat /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:34 17913 cms_Decode: cmsxrootd2 delays enstore.233531:159@fndca2b 1 /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:35 17939 acc_Audit: enstore.233531:159@fndca2b grant host *@fndca2b.fnal.gov stat /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:35 17913 cms_Decode: cmsxrootd2 sent enstore.233531:159@fndca2b 'Mrcmsxrootd-site1.fnal.gov:1094 Mrcmsxrootd-site3.fnal.gov:1094' /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:45 17869 acc_Audit: enstore.233544:463@fndca2b grant host *@fndca2b.fnal.gov stat /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:45 17913 cms_Decode: cmsxrootd2 sent enstore.233544:463@fndca2b 'Mr[2620:6a:0:8420::f8]:1094 Mr[2620:6a:0:8421::243]:1094' /store/test/xrootd/redirector/test-file
>>>
>>>
>>> ###cmsxrootd-site1###
>>>
>>>
>>>
>>> [root@cmsxrootd-site1 site]# tail -n 1000000 cmsd.log|grep test-file
>>>
>>> 230915 22:26:02 1955 manager.0:[log in to unmask] cms_do_State: /store/test/xrootd/T2_BR_SPRACE/store/user/jmsilva/1MiB-subscription-test-file.raw
>>>
>>> 230915 22:42:34 1953 manager.0:27@cmsxrootd2 cms_do_State: /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:34 13496 server.1580:30@cmsxrootd-site1:1096 cms_do_Have: /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:36 20735 enstore.233531:3840@fndca2b cms_do_Locate:  /store/test/xrootd/redirector/test-file
>>>
>>> [root@cmsxrootd-site1 site]# tail -n 1000000 xrootd.log|grep test-file
>>>
>>> 230915 22:42:36 31818 acc_Audit: enstore.233531:3840@fndca2b grant gsi [log in to unmask] stat /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:36 1944 cms_Decode: cmsxrootd-site1 sent enstore.233531:3840@fndca2b 'Srcmsxrootd-site1.fnal.gov:1096' /store/test/xrootd/redirector/test-file
>>>
>>> ###cmsxrootd-site3###
>>>
>>> [root@cmsxrootd-site3 site]# tail -n 1000000 cmsd.log|grep test-file
>>>
>>> 230915 22:26:02 33739 manager.0:[log in to unmask] cms_do_State: /store/test/xrootd/T2_BR_SPRACE/store/user/jmsilva/1MiB-subscription-test-file.raw
>>>
>>> 230915 22:42:34 33738 manager.0:31@cmsxrootd2 cms_do_State: /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:34 34190 server.33696:33@cmsxrootd-site3:1092 cms_do_Have: /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:36 34194 enstore.233531:49@fndca2b cms_do_Locate:  /store/test/xrootd/redirector/test-file
>>>
>>> [root@cmsxrootd-site3 site]# tail -n 1000000 xrootd.log|grep test-file
>>>
>>> 230915 22:42:36 33982 acc_Audit: enstore.233531:49@fndca2b grant gsi [log in to unmask] stat /store/test/xrootd/redirector/test-file
>>>
>>> 230915 22:42:36 33731 cms_Decode: cmsxrootd-site3 sent enstore.233531:49@fndca2b 'Srcmsxrootd-site3.fnal.gov:1092' /store/test/xrootd/redirector/test-file
>>>
>>> ------------
>>>
>>> So, the one without "-m" option didn't showed up in the cmxrootd-site1/3 redirectors. Could it be possible this was due to IP addresses were sent instead of host names when not using "-m" option?
>>>
>>> Thanks again for your help on this.
>>>
>>>
>>> Regards,
>>> Yujun
>>> ________________________________
>>> From: Andrew Hanushevsky <[log in to unmask]>
>>> Sent: Friday, September 15, 2023 7:12 PM
>>> To: Yujun Wu <[log in to unmask]>
>>> Subject: Re: Help with a xrdfs query puzzle with "xrdfs locate -d"
>>>
>>> Well, that's strange because when I try it I always get
>>>
>>> Server responded with an error: [3011] No valid location found
>>>
>>> regardless of whether -m is there or not. Could you provide another file
>>> that should be present?
>>>
>>> On Fri, 15 Sep 2023, Yujun Wu wrote:
>>>
>>>> Good afternoon.
>>>>
>>>> Could XRootD developers please help with a xrdfs puzzle?
>>>>
>>>> Bockjoo first noticed. When we query our XRootD regional redirector cmsxrootd2.fnal.gov, we were able to get locate results using "-m" option, but no results without "-m" option:
>>>>
>>>> ### xrdfs locate -d with "-m" option
>>>>
>>>>
>>>> bash-4.2$ date; xrdfs cmsxrootd2.fnal.gov:1094 locate -d -m /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> Fri Sep 15 21:22:52 CEST 2023
>>>>
>>>> cmsxrootd-site3.fnal.gov:1093 Server Read
>>>>
>>>> cmsxrootd-site2.fnal.gov:1093 Server Read
>>>>
>>>> cmsxrootd-site1.fnal.gov:1093 Server Read
>>>>
>>>> cmsio5.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio7.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio9.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio4.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio3.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio8.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio6.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>>
>>>> -------------------
>>>>
>>>> ### xrdfs locate -d without "-m" option
>>>>
>>>>
>>>> bash-4.2$ date; xrdfs cmsxrootd2.fnal.gov:1094 locate -d /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> Fri Sep 15 21:27:13 CEST 2023
>>>>
>>>> [ERROR] Server responded with an error: [3011] No valid location found
>>>>
>>>>
>>>> --------------------
>>>>
>>>> On the server side, the first one showed:
>>>>
>>>> 230915 14:22:53 18227 acc_Audit: yujun.12664:[log in to unmask] grant host *@lxplus734.cern.ch stat /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> 230915 14:22:53 17913 cms_Receive: cmsxrootd2 125 bytes on 727534553
>>>>
>>>> 230915 14:22:53 17913 cms_Decode: cmsxrootd2 sent yujun.12664:[log in to unmask] 'Mwcmsio2.rc.ufl.edu:1094 Mrcmsxrootd-site1.fnal.gov:1094 Mrcmsxrootd-site3.fnal.gov:1094 Mrcmsxrootd-site2.fnal.gov:1094' /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> 230915 14:22:53 17913 cms_Receive: cmsxrootd2 32 bytes on 727535577
>>>>
>>>>
>>>>
>>>> While the 2nd one without "-m" option showed:
>>>>
>>>>
>>>> 230915 14:27:13 27864 acc_Audit: yujun.9149:[log in to unmask] grant host *@lxplus734.cern.ch stat /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> 230915 14:27:13 17913 cms_Receive: cmsxrootd2 135 bytes on 743171027
>>>>
>>>> 230915 14:27:13 17913 cms_Decode: cmsxrootd2 sent yujun.9149:[log in to unmask] 'Mw[2620:104:1f:1000:faf2:1eff:fed9:dd80]:1094 Mr[2620:6a:0:8420::f8]:1094 Mr[2620:6a:0:8421::243]:1094 Mr[2620:6a:0:8420::f9]:1094' /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> 230915 14:27:13 17913 cms_Receive: cmsxrootd2 4 bytes on 743172051
>>>>
>>>>
>>>> ===================
>>>>
>>>>
>>>> As you can see, the successful one sent multiple hostnames while the failed one sent multiple IP addresses:
>>>>
>>>> 230915 14:27:13 27864 acc_Audit: yujun.9149:[log in to unmask] grant host *@lxplus734.cern.ch stat /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> 230915 14:27:13 17913 cms_Receive: cmsxrootd2 135 bytes on 743171027
>>>>
>>>> 230915 14:27:13 17913 cms_Decode: cmsxrootd2 sent yujun.9149:[log in to unmask] 'Mw[2620:104:1f:1000:faf2:1eff:fed9:dd80]:1094 Mr[2620:6a:0:8420::f8]:1094 Mr[2620:6a:0:8421::243]:1094 Mr[2620:6a:0:8420::f9]:1094' /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> 230915 14:27:13 17913 cms_Receive: cmsxrootd2 4 bytes on 743172051
>>>>
>>>>
>>>> ------------------------------------
>>>>
>>>>
>>>> In contrast, another USCMS regional redirector xrootd.unl.edu could return results with and without "-m" option:
>>>>
>>>>
>>>> bash-4.2$ date; xrdfs xrootd.unl.edu:1094 locate -d /store/mc/RunIIFall17FSPrePremix/Neutrino_E-10_gun/GEN-SIM-DIGI-RAW/PUFor2016_94X_mcRun2_asymptotic_v3-v1/2810000/7AB76D28-6C1D-EE11-B331-FA163EEB94EB.root
>>>>
>>>> Fri Sep 15 21:38:17 CEST 2023
>>>>
>>>> cmsxrootd-site3.fnal.gov:1093 Server Read
>>>>
>>>> cmsio5.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio7.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio9.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio4.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio3.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio8.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsio6.rc.ufl.edu:1094 Server ReadWrite
>>>>
>>>> cmsxrootd-site1.fnal.gov:1093 Server Read
>>>>
>>>> cmsxrootd-site2.fnal.gov:1093 Server Read
>>>>
>>>>
>>>> I was told their log file showed hostnames were sent even without "-m" option.
>>>>
>>>>
>>>>
>>>> For cmsxrootd2.fnal.gov XRootD redirector, I added
>>>>
>>>>
>>>> xrd.network dnr
>>>>
>>>>
>>>> option in our server side xrootd.cfg but it seems IP addresses still were sent. Could you please tell how I could force hostnames instead of IP addresses to be sent
>>>>
>>>> when running "xrdfs cmsxrootd2.fnal.gov:1094 locate -d" command?
>>>>
>>>>
>>>> Thanks in advance for any advice on this.
>>>>
>>>>
>>>>
>>>> Regards,
>>>>
>>>> Yujun
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
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