Re: Implementing DNS on SP2

From: Green, Simon (Simon.Green_at_EU.ALTRIA.COM)
Date: 07/30/03

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    Date:         Wed, 30 Jul 2003 16:55:34 +0200
To: aix-l@Princeton.EDU

    Thanks, Raj, that's interesting.
    Perhaps I'll do some sort of discrepancy report to highlight any
    differences.

    Simon Green
    Altria ITSC Europe Ltd

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    -----Original Message-----
    From: Raj Atwal [mailto:atwalrs@YAHOO.COM]
    Sent: 30 July 2003 15:34
    To: aix-l@Princeton.EDU
    Subject: Re: Implementing DNS on SP2

    Fair enough point about forgetting to make changes to both environments. We
    have just made it an admin responsibility and procedure that the hosts file
    must have all AIX servers defined in it.

    We have found in our testing that if DNS is down it takes a while before it
    fails over and resolves to the secondary server, and because all our mission
    critical apps are on the SP or on AIX servers we need to use local
    resolution first. That way we have no real dependency for our applications
    if DNS is down.

    I guess you have to make a choice for netsvc.conf that is applicable to the
    environment that you are working in. As I said for us and our applications
    we find it more efficient to use local before bind.

    "Green, Simon" <Simon.Green@EU.ALTRIA.COM> wrote:

    Regarding netsvc.conf, I'm in two minds.

    If one is going to use DNS, then surely it makes sense to _use_ it and use
    "bind,local". Otherwise, if you omit to make a change in /etc/hosts as well
    as DNS you could go badly awry.

    If I really can cut /etc/hosts down to the bone that's not very likely to be
    a problem, but we'll still have six distinct SP2s at the moment and over 100
    nodes, in a fairly fluid environment. (We're doing a lot of consolidation at
    the moment, so we keep moving things around and setting up temporary staging
    systems etc.)

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