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Hi Marian & Tommaso, DNS caching does not exist in xrootd until 4.0.0 and later. We added that because people were running into DNS issues when a lot of worker machines would all of a sudden connect at the same time. While using the nodnr option would completely avoid the DNS; some sites were annoyed that it leaves the log with nothing but IP addresses. Anyway, the default is 3 hours but you can set it to whatever you want (see xrd.network cache).... http://xrootd.org/doc/dev4/xrd_config.htm#_Toc383723505 As for automatically restarting everything, no we don't have such a feature because it isn't fully predictable in that a node might not be reachable via the cms network at the time you want to do the restart. We normally suggest using a simple ssh script to launch a restart on all the nodes -- beats having to log into a lot of servers. Andy -----Original Message----- From: Marian Zvada Sent: Tuesday, July 29, 2014 12:00 PM To: Tommaso Boccali ; [log in to unmask] Subject: Re: a way to remotely force restart? Hi, On 7/21/14, 3:05 AM, Tommaso Boccali wrote: > Ciao, > we are in the situation where we would like to add another redirector to > the DNS-RR setup (so a third one under the same DNS entry). If I > understand correctly, everyone (servers or local cmsd) using the DNS-RR > would need to be restarted, since they resolve hostname -> IPs at the > start. This is quite painful, clearly. > I was wondering if there is a way for a manager to say to all the > daemons attached to it "please restart/reload/re-resolve the IP", > instead of going and asking >40 servers to restart .... well, if sites have local redirector in front of servers it'll reduce effort significantly... it brings also much more pluses if many servers at a site. Question to xrootd-dev folks: Does it cache the DNS entries for a long time? How long actually? Thanks, Marian > 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 > ######################################################################## 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 ######################################################################## 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