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Dear Wei, Am 24.07.21 um 01:29 schrieb Yang, Wei: > I am comparing my config with others to debug an issue. We are all using xrootd 5.3 or 5.2. > > One thing I noticed is that I have the following line while other may not have: > > # Attempt to fix timeout issues for WebDAV transfers. > xrd.timeout hail 30 idle 0 kill 10 read 30 > > I vaguely remember I got this from Oliver Freyermuth but I could be wrong. Anyone still remember what is this about? indeed, this is from me — I checked our configuration of the BONN site, and we added this in July 2018, and did not question it later on. Sadly, I did not add more detailed comments in our changelog, and my memory is vague on the reason why we added this :-(. Since the XRootD defaults are: xrd.timeout hail 30 idle 0 kill 3 read 5 this slightly increases the kill and read timeouts. I _think_ that we increased these since we had seen timeouts waiting for replies / connections from some slower sites. To my understanding from the documentation, "kill" is the timeout before XRootD force-closes a connection in case the other end does not respond to an end-session command, while "read" is the timeout in which the initial protocol identification has to arrive. So increasing these makes XRootD less sensitive if the other end is slow (e.g. in case it is overwhelmed), but may accumulate more connections if there are many slow connections incoming. This may not be needed anymore at all, and you may be better off with the XRootD defaults especially for busy sites to prevent many connections from piling up. Since we added this before any smoke tests or real TPC testing was done, I've now put this on our list of settings we should try to get rid of (and observe if there are any adverse effects), Cheers, Oliver > > regards, > -- > Wei Yang | [log in to unmask] | 650-926-3338(O) > > > ######################################################################## > 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 > -- Oliver Freyermuth Universität Bonn Physikalisches Institut, Raum 1.047 Nußallee 12 53115 Bonn -- Tel.: +49 228 73 2367 Fax: +49 228 73 7869 -- ######################################################################## 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