DBS: Distributed Benchmark System

Performance Evaluation on VSAT Satellite Link Part II

3 data stream ( each transfer starts every 2.5 seconds )

• System Structure

  

• Data sheet

    CPU                  Twinhead Subnote(486 33MHz)
    OS                   BSD/OS V2.1
    Router               SPARCstation10(SunOS4.1.3)
    TCP Buffer Size      65535byte
    Message Size         1024byte
    Start Time           HOST4--HOST1: 0.00s
                         HOST4--HOST2: 2.50s
                         HOST4--HOST3: 5.00s
    Number of Send       HOST4--HOST1: 1000
                         HOST4--HOST2: 1000
                         HOST4--HOST3: 1000
    

• DBS Command File

• Sequence Number(Application Level)

  

• Throughput(Application Level)

  

4 data stream ( each transfers start every two seconds )

• System Structure

  

• Data sheet

    CPU                   Twinhead Subnote(486 33MHz)
    OS                    BSD/OS V2.1
    Router                SPARCstation10(SunOS4.1.3)
    TCP Buffer Size       65535byte
    Message Size          2048byte
    Number of Send        512
    Start Time            0s : HOST1->HOST5
                          2s : HOST2->HOST5
                          4s : HOST3->HOST5
                          6s : HOST4->HOST5
    

• DBS Command File

• Sequence Number(Application Level)

  

• Each Throughput and Total Throughput (Application Level)

  

  How unfair it is!

• Sequence Number(Kernel Level)