Teragrid-I 10GigE trace |
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This trace was collected with an NLANR PMA OC192MON located on SDSC's TeraGrid Cluster, during the week starting Sunday 8th of February 2004. The machine configuration is a Dell PowerEdge 2650 Dual 3.0GHz machine with 2GB of RAM, and two 2x146GB SCSI RAID0 arrays. The data collection is facilitated by a pair of Endace DAG6.1 OC192c (http://www.endace.com/dag6.1.htm) measurement cards operating in 10Gigabit-LAN mode. Some residual bit errors are visible within the trace, flagged (in part) by IP checksum errors. The trace file format is Endace's Extensible Record Format (ERF), fixed record sizes at 88 Bytes each. There is considerable VLAN activity, and a good proportion of the traffic is SDSC local, followed by Teragrid communication between SDSC and PSC. Files are presently split into 5 minute intervals, with one of two load balanced redundant links being monitored. Timestamp granularity: the actual oscillator is running at 100 MHz, the timestamp engine generates a synthetic frequency of 66 MHz, hence every clock tick represents 16 nanoseconds. - 26 bits fractions of a second timestamp resolution (2^-26). As of this writing data collection is still ongoing and will likely cover one weeks worth of data, or more. Traces are available via FTP (best for transferring large files): ftp://pma.nlanr.net/traces/long/tera/1/
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