RE: [load balancing] Question about lbs

From: Cheney, Sean (sean_cheneyIZZATgroton.pfizer.com)
Date: Thu Jan 15 2004 - 11:27:39 EST

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    Pete,

    My understanding of that blurb is, if traffic is flowing through to that
    service, it will not be interrupted. Once a FIN or RST is set for that
    conversation however, then next SYN will go to another service for the
    content in question.

    I could be wrong though, I often am :)

    -Sean

    -----Original Message-----
    From: P [mailto:pt_lbIZZAThotmail.com]
    Sent: Thursday, January 15, 2004 10:31 AM
    To: lb-lIZZATvegan.net
    Subject: RE: [load balancing] Question about lbs

    >> cisco told us it's coming in new realease.

    Strange. From the CSS manual, it sounds like it already does what you want:

    (config-service) suspend
    To remove the service from the pool for future load-balancing content
    requests, use the suspend command. Suspending a service does not affect
    existing content flows, but it does prevent additional connections from
    accessing the service for its content.

    Maybe the issue is that it kills all connections when you put it active
    again? In Cisco LocalDirector you need to use "oos maintenance" if you want
    to keep existing connections when you put it back into service.

    >> Is there any lb
    capable of putting a service into a suspend without lossing the connected
    users?

    I can't imagine there is a SLB that is _not_ capable of that, e.g. in Alteon
    "/oper/slb/dis" doesn't kill existing connections and optionally allows new
    TCP/HTTP connections that have a cookie affinity for that server (if you
    tell it to with the "p" for "persistent" option).

    Pete.

    -----Original Message-----
    From: owner-lb-lIZZATvegan.net [mailto:owner-lb-lIZZATvegan.net] On Behalf Of Daniel
    Howe
    Sent: Thursday, January 15, 2004 5:14 AM
    To: lb-lIZZATvegan.net
    Subject: [load balancing] Question about lbs

    Hi,
     as of today Cisco CSS only allow to have a service active/suspend. Problem
    is how to put that service in "no more connection but keep current users".
    cisco told us it's coming in new realease. My question is: Is there any lb
    capable of putting a service into a suspend without lossing the connected
    users?

    Thankx.

    Daniel.

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