Hello, When I trace events in PVFS2, using the pvfs2-set-eventmask and pvfs2-event-mon-example I get a randomly large counter for the seconds and microseconds for each trace.
I have all my servers and clients synced using NTP . I have attached a trace of 16 clients to 4 I/O servers, 1 MDS server [separate MDS] opening 2500 files using the mpi-md-test distributed with pvfs2. The entire operation too about 17 seconds. The large seconds value is used more as a counter. As I can see the number of microseconds each operation takes and this increments the seconds counter later eventually. But my question is- why do you have such a large counter- does this number mean something and how is it generated? The total amount of time spent at servers doesnt seem to be more than a second. For example server No. 3 [in the trace file] has all its operations done in 0.165442 microseconds . I obtained this value from the difference in the timing counters of the first and last trace for server no. 3. Am I interpreting this right? If yes, can it be possible for me to obtain a time breakup of time spent over the network, Client, Disk etc? Finally, I can see traces for servers 0,1,2,3. These would be the I/O servers. How can I generate MDS traces or view the times for MDS operations? Thanks Nirmal _______________________________________________ Pvfs2-users mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
