Re: Load Balancing the Proxy via Round Robin DNS
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Wed, 25 Sep 2002 06:38:08 -0700
RR DNS is a poor failover / load balancing technique.
It depends on:
1. the DNS server to provide a list of valid IPs; the DNS server is rarely
even aware of the resources that the IPs represent.
2. the DNS client to determine when a resource is unavailable and to choose
the next address; the client is also rarely aware of the resource state.
RR DNS does provide a minimum measure of load-sharing for the servers, but
only if they're all online.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/pages/author_index.asp?aut=3
http://isatools.org
Read the books!
----- Original Message -----
From: "Greg Wright" <greg@xxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Wednesday, September 25, 2002 12:25 AM
Subject: [isalist] Load Balancing the Proxy via Round Robin DNS
http://www.ISAserver.org
Hi everyone,
Anyone played around with Round Robin DNS configurations for load
balancing?
Specifically, what sort of issue's (if any) exist when one of the
servers is offline?
Cheers,
Greg
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