Re: Antwort: Re: What is the way to observe network traffic on a RS/6000 Adapter?

From: Denis Garrido Mendes (Denis.Mendes_at_TECBAN.COM.BR)
Date: 06/23/05

  • Next message: Green, Simon: "Re: SSA configuration question" 
    Date:         Thu, 23 Jun 2005 13:58:05 -0300
To: aix-l@Princeton.EDU

    With de NMON.

    http://www-128.ibm.com/developerworks/eserver/articles/nmon.html

    Introduction
    The nmon tool is designed for AIX and IBM eServer pSeries performance
    specialists to use for analyzing AIX performance data, including the
    following:
    CPU utilisation
    Memory use
    Kernel statistics and run queue information
    Disks I/O rates, transfers, and read/write ratios
    Free space on file systems
    Disk adapters
    Network I/O rates, transfers, and read/write ratios
    Paging space and paging rates
    CPU and AIX specification
    Top processors
    IBM HTTP web cache
    User defined disk groups
    Machine details and resources
    Async I/O
    Workload Manager
    ESS disks
    NFS
    Dynamic LPAR changes

    Use this tool together with nmon analyser which loads the nmon output file
    and automatically create dozens of graphs.

    Denis Garrido Mendes
    Suporte Técnico / CETEM
    3244-8377

    fmu@OERAG.DE
    Enviado Por: IBM AIX Discussion List <aix-l@Princeton.EDU>
    23/06/2005 13:42
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    Assunto
    Antwort: Re: What is the way to observe network traffic on a RS/6000
    Adapter?

    Hm,

    with tcpdump -i <interface>
    I don't see the average network traffic and also no peak.

    # tcpdump -i en0
    tcpdump: listening on en0
    18:34:29.711055834 charon_e.32851 > styx_e.hats.hermes_e: udp 76
    18:34:29.712416916 styx_e.hats.hermes_e > medusa_e.hats.hermes_e: udp 76
    18:34:29.763647374 phoenix_e.32862 > pegasus_e.hats.hermes_e: udp 76
    18:34:29.928263936 ikarus_e.hats.hermes_e > charon_e.hats.hermes_e: udp 76
    18:34:30.008060807 phoenix_e.hats.hermes_e > pegasus_e.hats.hermes_e: udp
    76

     
                 Mark Ray
                 <raym@US.IBM.COM>
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                                            Re: What is the way to observe
                                            network traffic on a RS/6000
                 23.06.2005 18:05 Adapter?
     
     
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    Frank:

    One of the better network traffic monitors is "tcpdump". The basic syntax
    is 'tcpdump -i ,<interface>'
    Note that, "netpmon" is more granular, but running it will incur a
    significant performance hit on
    your systems.

    Mark Ray
    IBM

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                 06/23/2005 11:53 What is the way to observe network
                 AM traffic on a RS/6000 Adapter?

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    Hi,

    on one of our SP node (AIX 5.2) runs a DB2 database (V8). All 120 clients
    (Windows) works with this database and they are connect over 100MBit
    Ethernet cards in our network.

    Now we want the same application build again. But now the server is in
    another location/city than the clients and we must work over a WAN and not
    a LAN.

    But I do not know the capacity which we need for the WAN or how big must
    the line from city to city.

    I reset the adapter statistik and check the output after 7h with entstat.
    Here the result for en1 and en2:

    -------------------------------------------------------------
    ETHERNET STATISTICS (en1) :
    Device Type: Gigabit Ethernet-SX PCI Adapter (14100401)
    Hardware Address: 00:02:55:9a:54:e9
    Elapsed Time: 0 days 7 hours 18 minutes 18 seconds

    Transmit Statistics: Receive Statistics:
    -------------------- -------------------
    Packets: 1755437 Packets: 398349
    Bytes: 2633851309 Bytes: 24161670
    Interrupts: 5307 Interrupts: 358738
    Transmit Errors: 0 Receive Errors: 0
    Packets Dropped: 0 Packets Dropped: 0
                                                  Bad Packets: 0
    Max Packets on S/W Transmit Queue: 77
    S/W Transmit Queue Overflow: 0
    Current S/W+H/W Transmit Queue Length: 0

    -------------------------------------------------------------
    ETHERNET STATISTICS (en3) :
    Device Type: Gigabit Ethernet-SX PCI Adapter (14100401)
    Hardware Address: 00:02:55:9a:54:e5
    Elapsed Time: 0 days 2 hours 53 minutes 8 seconds

    Transmit Statistics: Receive Statistics:
    -------------------- -------------------
    Packets: 1535981 Packets: 1067630
    Bytes: 1853344547 Bytes: 199525044
    Interrupts: 29289 Interrupts: 1042437
    Transmit Errors: 0 Receive Errors: 0
    Packets Dropped: 0 Packets Dropped: 0
                                                  Bad Packets: 0
    Max Packets on S/W Transmit Queue: 105
    S/W Transmit Queue Overflow: 0
    Current S/W+H/W Transmit Queue Length: 3

    When I calculte the bytes (for example Transmit) I get for en1 99 MByte/s
    and for en3 56 MByte/s
    I think that is very high and I want now control this values with a other
    tool?
    And this is the average and not a peak.

    Is this possible?

    Best regards,
     Frank Mueller

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