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Hi Tommaso, we have very same setup for CMS T2 and currently in commissioning process. We have DNS round-robin alias between FNAL and UNL and use the following in the config: all.manager meta all cmsxrootd.fnal.gov+ 1213 (xrootd1.fnal.gov and xrootd.unl.edu behind that) => I think this should be adapted also for your setup as well I believe, though pointing to different aliased host. For the question of "all" as parameter I was already asking in developers list what's beneficial, all || any, but didn't get response so far. Here it's documented but I didn't get full understanding what's recommended from operation point of view while using DNS-RR setup: http://xrootd.org/doc/prod/cms_config.htm#_Toc339484334 However, we stick so far with: all.manager meta all cmsxrootd.fnal.gov+ 1213 Also, currently each of top redirectors in the DNS-RR alias subscribes to global redirector: all.manager meta any cms-xrd-global.cern.ch+ 1098 (see 'any' in this case) Hope that helps. -Marian On 27.3.2014 3:43, Tommaso Boccali wrote: > Ciao, reading CMSD documentation I read > > > 2.1 manager > > ... > > 8) If the manager host name ends with a plus, then all the IP addresses > associated with host are treated as managers and every non-manager > *cmsd* and *xrootd* subscribes to each one. This allows you to easily > construct fault-tolerant configurations using the IP address alias > feature in DNS. > > > > I would like to use this: we have a setup in which a regional redirector > is replicated 2+ times, and all the redirectors are resolved via a > single DNS name, which reports 2+ IPs. > I understand cmsd upon start will connect to ALL of them, right? > > That said (supposing I understood correctly), I have a second question: > the IPs returned via DNS queries are supposed to be changing with time, > because we have automatic removal of those which are not ok at a given > moment. > > What happens if a site starts cmsd when an IP is not present? If later > that goes back in to the DNS, will it be picked up or the list of > manager is built statically at startup? > > thanks a lot > > tom > > -- > Tommaso Boccali > INFN Pisa > > ------------------------------------------------------------------------ > > Use REPLY-ALL to reply to list > > To unsubscribe from the XROOTD-L list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1 > <https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1> > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1