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| shehryar |
 Posted: Wed Mar 24, 2010 3:36 am Post subject: Client connection reliability |
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Novice
Joined: 11 Mar 2010
Posts: 14
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Hi,
Has anyone used a client connection to WMQ server over a long distance, possibly across continents? If yes, how reliable has it been?
I know network glitches can occur any time. However, I am looking for general experiences.
Thanks and regards |
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| RogerLacroix |
| Posted: Wed Mar 24, 2010 12:04 pm Post subject: |
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Jedi Knight
Joined: 15 May 2001
Posts: 3264
Location: London, ON Canada
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Hi,
IBM recommends only using client connections over a LAN and not a WAN.
Regards,
Roger Lacroix
Capitalware Inc.
_________________
Capitalware: Transforming tomorrow into today.
Connected to MQ!
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| mqjeff |
| Posted: Wed Mar 24, 2010 12:38 pm Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| The reliability of an MQ client connection is strictly tied to the reliability of the network link it is running over. |
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| shehryar |
| Posted: Sun Mar 28, 2010 11:36 pm Post subject: |
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Novice
Joined: 11 Mar 2010
Posts: 14
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| Thanks for the response. Much appreciated. |
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| zpat |
| Posted: Mon Mar 29, 2010 12:25 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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It depends on the WAN, I've used them extensively within a corporate network which had decent bandwidth over the WAN links and they work fine.
Recently set up a MQ client in North America connecting to a UK based queue manager without problems.
I think the "avoid WANs" advice is probably out of date with many modern networks. |
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| Vitor |
| Posted: Mon Mar 29, 2010 5:29 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| zpat wrote: |
| It depends on the WAN |
| zpat wrote: |
| I think the "avoid WANs" advice is probably out of date with many modern networks. |
But not all. Despite the advances in technology, there have been few advances in network budget. And WANs have many more components in which well meaning network people can make one trivial change "which couldn't possibly have any impact".
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| zpat |
| Posted: Mon Mar 29, 2010 5:36 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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The sites where I have worked have had a lot of investment in networks.
Links between remote locations of multi-megabit bandwidth are now common, whereas in the early days they might be struggling on 64 kb.
Links between major corporate locations are usually very good, links to small locations such as branches may not be so good.
TCP/IP was originally a WAN protocol so it copes fairly well.
However, as always, it is a good idea to make sure the client application responds appropriately to MQRC 2009 conditions (these can occur on LANs as well).
Ideally it should re-acquire the connection, retrying the MQCONN at a reasonable interval without manual intervention.
The WMQ v7 client has the ability to reconnect automatically, making it even more suitable for WAN usage. |
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| Vitor |
| Posted: Mon Mar 29, 2010 5:59 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| zpat wrote: |
| The sites where I have worked have had a lot of investment in networks. |
You've been lucky.
| zpat wrote: |
| Links between remote locations of multi-megabit bandwidth are now common, whereas in the early days they might be struggling on 64 kb. |
You'd be amazed how many places who could afford better are making do with 2Mb
| zpat wrote: |
| However, as always, it is a good idea to make sure the client application responds appropriately to MQRC 2009 conditions (these can occur on LANs as well). |
It's the single thing most often missed by app people.
| zpat wrote: |
| The WMQ v7 client has the ability to reconnect automatically, making it even more suitable for WAN usage. |
But am I correct in saying it's only true if the queue manager is at v7 as well?
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| zpat |
| Posted: Mon Mar 29, 2010 6:08 am Post subject: |
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Jedi Council
Joined: 19 May 2001
Posts: 5866
Location: UK
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| Yes, needs WMQ v7 at both ends. |
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