Communication between RAC instances in google.

Hi,
I see different answers for this Communication between RAC instances in google.
1. UDP
2.Distributed Lock Manager (DLM)
which one of is correct?

Pl do not post duplicate threads - Communication between RAC instances
Srini

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  • Communication between RAC instances

    Hi,
    I see different answers for this Communication between RAC instances in google.
    1. UDP
    2.Distributed Lock Manager (DLM)
    which one of is correct?

    both of them are correct on different layers. The IP protocol used over the interconnect is udp and one of the protocols/mechanism implemented above that is DLM.

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    "Michael Girdley" <[email protected]> wrote in message
    news:[email protected]...
    >
    >
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    "Randy Jay Yarger" <[email protected]> wrote in message
    news:[email protected]...
    Hi,
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    tcp        0      0 firefly.snowdrop.:22111 firefly.snowdrop.c:8080 ESTABLISHED
    tcp        0      0 firefly.snowdrop.:22107 firefly.snowdrop.c:8080 ESTABLISHED
    tcp        0      0 firefly.snowdrop.:22109 firefly.snowdrop.c:8080 ESTABLISHED
    tcp        0      0 firefly.snowdrop.:22112 firefly.snowdrop.c:8080 ESTABLISHED
    tcp        0      0 firefly.snowdrop.:22108 firefly.snowdrop.c:8080 ESTABLISHED
    tcp6       0      0 [::]:8080               [::]:*                  LISTEN    
    tcp6       0      0 firefly.snowdrop.c:8080 firefly.snowdrop.:22108 ESTABLISHED
    tcp6       0      0 firefly.snowdrop.c:8080 firefly.snowdrop.:22107 ESTABLISHED
    tcp6       0      0 firefly.snowdrop.c:8080 firefly.snowdrop.:22112 ESTABLISHED
    tcp6       0      0 firefly.snowdrop.c:8080 firefly.snowdrop.:22109 ESTABLISHED
    tcp6       0      0 firefly.snowdrop.c:8080 firefly.snowdrop.:22110 ESTABLISHED
    tcp6       0      0 firefly.snowdrop.c:8080 firefly.snowdrop.:22111 ESTABLISHEDWhat are 22108, 22107, etc? I cannot reproduce this either.
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    Edited by: Valerie Debonair on Aug 1, 2011 9:43 PM

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    B  000 000 R/3              000000000 ACTIVE       NO  YES NO  000 255 255 20110831 154542 CRMSYS         
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    I  MtxInit: 0 0 0
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    M  SHM_ROLL_ADM               (addr: 0CB50040, size: 615040)
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    B  dbexpbuf: Buffer ESM   (addr: 134E00D0, size: 4194304, end: 138E00D0)
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    M  SecAudit(RsauShmInit): addr of RSAUSLOTS...... = 05BD07EC
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