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I am not a expert on this but, from what I have read so far the
recommended way is to setup ICM on all your clustered servers and share the
ICM config between them. Again I am not an expert as I am just trying to
get all of the details myself.
Thanks,
Scott Reece
System Administrator
City of Bend
sreece@xxxxxxxxxxxxx
Office - 541-388-4426
"Once you say you're going to settle for second, that's what happens to you
in life. " --JFK
rob@xxxxxxxxx
Sent by:
domino400-bounces To
+sreece=ci.bend.o Lotus Domino on the iSeries / AS400
r.us@xxxxxxxxxxxx <domino400@xxxxxxxxxxxx>
cc
06/27/2006 11:39 Subject
AM Re: [SPAM?] Re: Internet Cluster
Manager
Please respond to
Lotus Domino on
the iSeries /
AS400
<domino400@midran
ge.com>
How do you configure, and use, two ICM's? I thought one was supposed to
figure out which end domino server to go to. Or do you still use some
utility device to spray between the two?
Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
Scott Reece <SReece@xxxxxxxxxxxxx>
Sent by: domino400-bounces+rob=dekko.com@xxxxxxxxxxxx
06/27/2006 02:34 PM
Please respond to
Lotus Domino on the iSeries / AS400 <domino400@xxxxxxxxxxxx>
To
Lotus Domino on the iSeries / AS400 <domino400@xxxxxxxxxxxx>
cc
Subject
Re: [SPAM?] Re: Internet Cluster Manager
If I go with the ICM route I would configure it on Domino running on the
iSeries, as well as on our Solaris machine running domino (our mail
cluster
servers), so it is completely different hardware.
Thanks,
Scott Reece
System Administrator
City of Bend
sreece@xxxxxxxxxxxxx
Office - 541-388-4426
"Once you say you're going to settle for second, that's what happens to
you
in life. " --JFK
rob@xxxxxxxxx
Sent by:
domino400-bounces To
+sreece=ci.bend.o Lotus Domino on the iSeries / AS400
r.us@xxxxxxxxxxxx <domino400@xxxxxxxxxxxx>
cc
06/27/2006 11:25 Subject
AM [SPAM?] Re: Internet Cluster
Manager
Please respond to
Lotus Domino on
the iSeries /
AS400
<domino400@midran
ge.com>
Stay away from the DNS round robin. They do not handle failover. Just
crude load balancing.
Sounds like ICM does a much more thorough job than any other utility can.
But that is probably because it was tailored for Domino. Walter gave some
vague response to load concerns. Would be nice to see the load when the
recommendation for a sprayer vs ICM starts to tip the scale.
Where would your ICM run? In our case running ICM in a separate dpar or
even lpar on the same rack doesn't make a whole lot of sense. When we
upgrade FSP code for the rack all lpars are down.
Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
Scott Reece <SReece@xxxxxxxxxxxxx>
Sent by: domino400-bounces+rob=dekko.com@xxxxxxxxxxxx
06/27/2006 02:13 PM
Please respond to
Lotus Domino on the iSeries / AS400 <domino400@xxxxxxxxxxxx>
To
Lotus Domino on the iSeries / AS400 <domino400@xxxxxxxxxxxx>
cc
Subject
Re: Internet Cluster Manager
All of my research says that it is for load balancing and failover....
steps from the help file include "Determines where replicas reside and
whether they are marked out of service or pending delete. Checks the
server
availability index of each server that contains a replica. Checks the
availability of the server by pinging the HTTP port or the HTTPS port,
depending on the client request. Eliminates any servers that are not
reachable or are RESTRICTED. Eliminates any servers that are BUSY or in
the
MAXUSERS state. Selects a server from those remaining. If there are no
servers remaining, the ICM chooses a server that is BUSY or in the
MAXUSERS
state, if one is available. If there are multiple servers remaining, the
ICM chooses the server with the lightest current workload".
Fail over occurs: When a server fails, When an HTTP client is connected to
a server that fails, the client receives a message saying that the server
is not responding. To fail over to a different replica, if one is
available, the user must contact the ICM again. The user can do this in
the
following ways: Click the Back button in the browser one or more times to
connect to a page through the ICM: Use a bookmark: Type the URL
The user may or may not have to reauthenticate with the new server. This
is
determined by the following factors: If the user already authenticated
with
the new server during this session, no authentication is necessary If the
HTTP client and the server both support SSL3, reauthentication occurs
automatically
Do you remember what the cost is associated with Puakma's Web Booster? We
are a small shop and would prefer not to spend a lot. We thought about
just
doing a DNS round robin, but then how do we handle the cache?
We are a small shop, only about 550 mail databases, probably only around
200 web users. Maybe 100 web users and 200 Notes clients connected to the
system at anyone time.
Thanks,
Scott Reece
System Administrator
City of Bend
sreece@xxxxxxxxxxxxx
Office - 541-388-4426
"Once you say you're going to settle for second, that's what happens to
you
in life. " --JFK
Chris Whisonant
<Chris.Whisonant@
comporium.com> To
Sent by: Lotus Domino on the iSeries / AS400
domino400-bounces <domino400@xxxxxxxxxxxx>
+sreece=ci.bend.o cc
r.us@xxxxxxxxxxxx
Subject
Re: Internet Cluster Manager
06/27/2006 10:33
AM
Please respond to
Lotus Domino on
the iSeries /
AS400
<domino400@midran
ge.com>
Scott, I have seen a good bit of negative feedback with ICM. I have been
testing out Puakma's Web Booster. It will do load balancing/failover for
http. Actually, from my understanding, ICM will only do load balancing,
right? In my environment I don't want http to be load balanced because our
cluster iSeries has a lot less horsepower. Puakma didn't initially have
this, but they have since updated it to run in strict failover mode.
I also know someone who is running a BlueCoat SG appliance for this.
Also, I have not tested ICM personally, but when I was researching this
last year I saw where customers didn't recommend ICM.
Chris Whisonant
Comporium
Senior Mid-Range Systems Administrator
IBM eServer Certified Systems Expert - iSeries Technical Solutions V5R2
IBM Certified System Administrator - Lotus Notes and Domino 6/6.5
IBM Certified Associate Developer - Lotus Notes and Domino 6/6.5
803.326.7270 | 803.326.6142 fax
domino400-bounces+chris.whisonant=comporium.com@xxxxxxxxxxxx wrote on
06/27/2006 12:55:23 PM:
Is anyone using ICM? if so how is it working for you? I would like to
use
it for our mail servers, but I also want to hear what anyone you think before I configure it. Is it going to be a performance hit to our mail servers? is it pretty seamless? What about the unread marks problems? please any feedback would be greatly appreciated, good or bad. Thanks, Scott Reece System Administrator City of Bend sreece@xxxxxxxxxxxxx Office - 541-388-4426 "Once you say you're going to settle for second, that's what happens to
you
in life. " --JFK _______________________________________________ This is the Lotus Domino on the iSeries / AS400 (Domino400) mailing list To post a message email: Domino400@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/domino400 or email: Domino400-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/domino400.
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