Hi, > I would suggent a double-check on first drop mechanism: resend probing > packet to no responding servers after serveral minutes. > a. If the server is running fine, only overloading, it may be able to > reply to probing packet after some time. We have double-check to > confirm this, then go back to 20 mins checking cycle. No score > modification (addition/deduction) is performed in this scenario. > Further no-responding checks will still be double-checked.
Maybe the NTP probing could be combined with some pings - just to check the amount of packet loss. This would imply that the server needs to respond to ICMP echo requests but would help the monitoring system to detect if a server is overloaded (maybe by comparing RTT times), totally offline or just a bit lossy. Besides that, I have no packet loss to China or Taiwan from Germany (tested with the pool servers for CN and TW). I assume this will be the same for most other european countries, so maybe a monitoring system located in europe might help resolving this issue AND could make monitoring more reliable since you have two fully (carrier) independet monitoring locations. And hosting in Europe is really cheap. Greetings Max _______________________________________________ pool mailing list [email protected] http://lists.ntp.org/listinfo/pool
