...
| Wiki Markup |
|---|
Failed to connect to [http://129.22.150.90] response code 500
ERROR: you're (134.79.18.134) already running a measurement on socket 14. [http://128.83.122.179]
10 packets transmitted, 0 received, 100% packet loss, time 0 ms rtt min/avg/max = 0/0/0 [http://141.149.218.208]
Can't resolve DNS: submitted:6:in `ip_dst=': unable to resolve $target: running in a chroot without dns support (RuntimeError)
submitted:9: warning: didn't see packet 5 leave: pcap overloaded or server bound to incorrect interface?
To 134.79.16.9 timed out
Error connecting: Connection refused
ERROR: you need a valid scriptroute authentication cookie to use this server, or the cookie you used does not match your client IP 134.79.18.163; go to [http://www.scriptroute.org/cookies.html] to get one.
ERROR: you're (134.79.18.134) already running a measurement on socket 10.
PlanetLab Server Error: Received: IP (tos 0xc0, ttl 253, id 51592, offset 0, flags \[none\], length: 56)
192.70.187.218 > 198.82.160.220: icmp 36: time exceeded in-transit
Error connecting: No buffer space available
submitted:9:in `send_train': scriptrouted error: unable to send to 137.138.137.177: No buffer space available (ScriptrouteError) |
Logging
In addition to the normal web server (Apache) logging, we use Log4perl for logging. The configuration file is very simple. The following types of error messages can be found in the log file.
...
Timeout | 2 secs | 10 secs |
|---|---|---|
100% loss | 7, 10, 9 | 10, 11, 8 |
Success | 22, 16, 17 | 20, 14, 21 |
Fail to connect | 10, 8, 9 | 8, 6, 5 |
Timeout | 45, 50, 49 | 46, 51, 46 |
...
Performance
Some spot measures of performance indicate that for 10 pings per target and 86 PlanetLab landmarks for region=northamerica as we vary the number of landmarks accessed simultaneously, the number of parallel requests per landmark, and the timeout for each request the duration is as follows (n.b. there is a timeout of 100 seconds on the complete process, and the default values are ins boldface in the table below:
...