Rao,
Changing to use RQSTR channels seem perfectly reasonable to me. If you do
this, you might want to consider changing your sender channels to servers.
A requester channel connecting to a sender will cause the sender end to
break the communications and re-connect back to the requester (ie. like a
phone callback). This can be useful in some circumstances but clearly adds
overhead. If you define a server channel (fully qualified with hostname
etc) then you'll be able to start the channel from either end without
callbacks.
Cheers,
P.
Paul G Clarke
WebSphere MQ Development
IBM Hursley
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| Subject: RCVR versus RQSTR channels
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Fellows
We are in the process moving in to hub & spoke architecture from the
existing point-to-point architecture.
Currently all receiving channels are defined as RCVR. Given that RQSTR has
got a hand-shaking ability with SENDR partner, I am thinking of replacing
all RCVR channels with RQSTR channels. Which may give added comfort factor
that if one NODE is rebooted the channels will be up and running straight
way rather than waiting for SENDR retry period.
I know two differences between these two types - 1) RQSTR needs a fully
qualified partner name 2) RQSTR sends a "request" for session initation. I
am planning to keep the SENDR channels as it is. I am also aware of the
fact that, changing the type means deleting the old one and creating new -
means synchronising the channel sequence numbers etc.. This is all ready
factored in.
We always had a dedicated receiver channel for each pair and not used any
generic receiver channels. Also we use DNS names and not IP addresses so
that in our Diaster Recovery we can swap the DNS entries to different
boxes.
So given these, anybody out there still see any disadvantages of this idea.
Thanks for your input in advance.
Cheers
Rao Adiraju
WebSphere MQ Specialist
The National Bank of NZ Ltd.
Wellington - New Zealand
Tel: +64-4-494 4299
Fax: +64-4-802 8509
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