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Is anybody successfully running xrootd on RHEL? If so, what workaround are you using for XrdOlbMonPerf? For those not familiar with the problem: Due to a fascinating design choice by Red Hat, the output to a pipe from "netstat -c -i 60" is fully buffered instead of line buffered (even unbuffered would have been okay). So there is no output for about 15-20 minutes, (sometimes longer). This breaks XrdOlbMonPerf. The next problem I see is in the olbd log: 041013 02:08:15 18062 olb_Server: Logged into foo.lns.cornell.edu 041013 02:19:00 18062 olb_Meter: Perf monitor returned invalid output: 041013 02:19:30 18062 olb_Meter: Restarting monitor: /home/gregor/xrootd.inst/etc/XrdOlbMonPerf It is far from clear why it is getting no output. I didn't spot a timeout anywhere in the stream code but it doesn't wait for the output... and of course, restarting XrdOlbMonPerf means that I never get any output because it always takes too long for the netstat started by XrdOlbMonPerf to produce anything. To add insult to injury, the netstat processes rarely die (even though their parent XrdOlbMonPerf is gone) and so the netstats quietly fill up the proc table. It is clear that not restarting the monitor won't help. If I just wait until data does appear, then I wait 20 minutes and the first thing I read is 20 minutes out of date, and then I will get a stream of data reports, 1 per second until the pipe is empty and then I wait another 20 minutes. -- Gregory J. Sharp email: [log in to unmask] Wilson Synchrotron Laboratory url: http://www.lepp.cornell.edu/~gregor Dryden Rd ph: +1 607 255 4882 Ithaca, NY 14853 fax: +1 607 255 8062