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Message
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| skoesters |
 Posted: Thu Jun 12, 2008 10:07 pm Post subject: Question about how to create a cluster |
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Acolyte
Joined: 08 Jun 2008
Posts: 73
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Good Morning together,
i have a question about creating an MQ Cluster.
i dont know much about MQ, but we need to change our existing way to work with MQ.
Until today we have the following Infratructur.
5 Servers with an MQ installation on them (one Installation for each "Company" we are connected to).
Each installation has 1 Manager queue, 2 local queues and 2 channels (send and receive).
Now we would like to put this 5 MQ Installations on only 2 Servers (Master / Slave) and create a Cluster from this 2 Servers (also for failover).
But i do not really know how to do this.
Here are my thoughts how to do it.
1.
| Code: |
MQ Server 1 (MASTER):
MASTER.QUEUE.MANAGER
COMPANY-ABC.QUEUE1
SEND.CHANNEL
COMPANY-ABC.QUEUE2
RECEIVE.CHANNEL
COMPANY-DEF.QUEUE1
SEND.CHANNEL
COMPANY-DEF.QUEUE2
RECEIVE.CHANNEL
COMPANY-GHI.QUEUE1
SEND.CHANNEL
COMPANY-GHI.QUEUE2
RECEIVE.CHANNEL
MQ Server 2 (SLAVE):
SLAVE.QUEUE.MANAGER
COMPANY-ABC.QUEUE1
SEND.CHANNEL
COMPANY-ABC.QUEUE2
RECEIVE.CHANNEL
COMPANY-DEF.QUEUE1
SEND.CHANNEL
COMPANY-DEF.QUEUE2
RECEIVE.CHANNEL
COMPANY-GHI.QUEUE1
SEND.CHANNEL
COMPANY-GHI.QUEUE2
RECEIVE.CHANNEL
then create a CLUSTER with Server 1 (MASTER.QUEUE.MANAGER) and Server 2 (SLAVE.QUEUE.MANAGER) in it?
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or should it look like this
2.
| Code: |
MQ Server 1 (MASTER):
MASTER.QUEUE1.MANAGER
COMPANY-ABC.QUEUE1
SEND.CHANNEL
COMPANY-ABC.QUEUE2
RECEIVE.CHANNE
MASTER.QUEUE2.MANAGER
COMPANY-DEF.QUEUE1
SEND.CHANNEL
COMPANY-DEF.QUEUE2
RECEIVE.CHANNE
MASTER.QUEUE3.MANAGER
COMPANY-GHI.QUEUE1
SEND.CHANNEL
COMPANY-GHI.QUEUE2
RECEIVE.CHANNE
MQ Server 2 (SLAVE):
SLAVE.QUEUE1.MANAGER
COMPANY-ABC.QUEUE1
SEND.CHANNEL
COMPANY-ABC.QUEUE2
RECEIVE.CHANNE
SLAVE.QUEUE2.MANAGER
COMPANY-DEF.QUEUE1
SEND.CHANNEL
COMPANY-DEF.QUEUE2
RECEIVE.CHANNE
SLAVE.QUEUE3.MANAGER
COMPANY-GHI.QUEUE1
SEND.CHANNEL
COMPANY-GHI.QUEUE2
RECEIVE.CHANNE
then create CLUSTER with 6 Manager queues (MASTER.QUEUE1-3.MANAGER and SLAVE.QUEUE1-3.MANAGER) in it?
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or should it look like this?
3.
| Code: |
MQ Server 1 (MASTER):
MASTER.QUEUE1.MANAGER
COMPANY-ABC.QUEUE1
SEND.CHANNEL
COMPANY-ABC.QUEUE2
RECEIVE.CHANNE
MASTER.QUEUE2.MANAGER
COMPANY-DEF.QUEUE1
SEND.CHANNEL
COMPANY-DEF.QUEUE2
RECEIVE.CHANNE
MASTER.QUEUE3.MANAGER
COMPANY-GHI.QUEUE1
SEND.CHANNEL
COMPANY-GHI.QUEUE2
RECEIVE.CHANNE
MQ Server 2 (SLAVE):
SLAVE.QUEUE1.MANAGER
COMPANY-ABC.QUEUE1
SEND.CHANNEL
COMPANY-ABC.QUEUE2
RECEIVE.CHANNE
SLAVE.QUEUE2.MANAGER
COMPANY-DEF.QUEUE1
SEND.CHANNEL
COMPANY-DEF.QUEUE2
RECEIVE.CHANNE
SLAVE.QUEUE3.MANAGER
COMPANY-GHI.QUEUE1
SEND.CHANNEL
COMPANY-GHI.QUEUE2
RECEIVE.CHANNE
then create a CLUSTER with each MASTER / SLAVE queue Manager combination?
for example
MASTER.QUEUE1.MANAGER + SLAVE.QUEUE1.MANAGER = CLUSTER-ABC
MASTER.QUEUE2.MANAGER + SLAVE.QUEUE2.MANAGER = CLUSTER-DEF
MASTER.QUEUE3.MANAGER + SLAVE.QUEUE3.MANAGER = CLUSTER-GHI
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for infomation. There is no need, that it is possbile to send Messages from COMPANY-ABC to DEF. Only from ABC to ABC, DEF to DEF and GHI to GHI.
or are all 3 ideas wrong and it has to look completly different?
i read the explanation to clusters on http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp but did not fully understand it
thanks in advanced for explanation.
best regards
Sebastian |
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| HubertKleinmanns |
| Posted: Thu Jun 12, 2008 10:57 pm Post subject: |
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Shaman
Joined: 24 Feb 2004
Posts: 732
Location: Germany
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If you are not familiar with MQ I recommend NOT to use MQ clustering - especially for only 5 QMgrs. To enable a failover mechanism I would suggest, to create the QMgrs on shared disks (depends on your platform, maybe a SAN or a HA cluster like HACMP, Veritas, SunHA, MSCS etc.).
MQ clustering is not so difficult, but I promise, you will get big trouble, when you do not know the MQ basics!
_________________
Regards
Hubert |
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| skoesters |
| Posted: Thu Jun 12, 2008 11:50 pm Post subject: |
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Acolyte
Joined: 08 Jun 2008
Posts: 73
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thanks for your reply.
so you think it would be better to use just a normal MQ installation? So none if "my" ways (above) would be se correct one?
When you say not to use Clustering, i have nearly the "same" question.
do i have to create just 1 Manager Queue with x local queues and x channels for each Company we are connected to or do i need to create 1 Manager Queue for each Company we are connected to (here 5 manager queues on the Server).
best regards
Sebastian |
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| HubertKleinmanns |
| Posted: Fri Jun 13, 2008 12:11 am Post subject: |
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Shaman
Joined: 24 Feb 2004
Posts: 732
Location: Germany
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| skoesters wrote: |
thanks for your reply.
so you think it would be better to use just a normal MQ installation? So none if "my" ways (above) would be se correct one?
When you say not to use Clustering, i have nearly the "same" question.
do i have to create just 1 Manager Queue with x local queues and x channels for each Company we are connected to or do i need to create 1 Manager Queue for each Company we are connected to (here 5 manager queues on the Server).
best regards
Sebastian |
What I mean is, you should learn something about MQ before you start setting up a QMgr environment.
I cannot valuate your suggestions, because I do not really understand your samples (it is not MQ syntax). But I think I now understand your requirements.
You want to connect your environment to several different companies, right? I guess you will have some firewalls, VPN, SSL tunnel, leased lines or something like this, right?
Then I would not use MQ clustering at all (and I am very familiar with MQ clustering).
I would suggest, to create one QMgr (maybe a second one for backup or failover) with several channel pairs - one pair to each other company - as a gateway QMgr somewhere in a DMZ (behind a firewall to the other companies). This gateway QMgr then has to route messages from the customers to another QMgr in you intranet (behind a second firewall) and back.
_________________
Regards
Hubert |
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| skoesters |
| Posted: Fri Jun 13, 2008 12:48 am Post subject: |
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Acolyte
Joined: 08 Jun 2008
Posts: 73
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yes we are connected to several different companies.
for example.
we have one Server with MQ series connecting over ISDN to a financial institution.
then we have one Server with MQ Series connecting to a stock exchange via leased line.
and so on.
now we would like to have 1 Server where all the different companies (the financial institution, the stock exchange ...) connect to (over several ways - bt radinaz, leased line, vpn, isdn - instead of having several servers with several MQ installations).
so i thought to have 1 manager queue with several channels and queues for the several companies.
Also we would like to have a second MQ Server for fail over (first server crashes, second server takes all channels...).
the server would be located behind da dmz.
I thought the Cluster would do the failover thing for me. |
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| HubertKleinmanns |
| Posted: Fri Jun 13, 2008 1:20 am Post subject: |
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Shaman
Joined: 24 Feb 2004
Posts: 732
Location: Germany
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| skoesters wrote: |
| so i thought to have 1 manager queue with several channels and queues for the several companies. |
Ok.
| skoesters wrote: |
Also we would like to have a second MQ Server for fail over (first server crashes, second server takes all channels...).
...
I thought the Cluster would do the failover thing for me. |
No, MQ cluster does not perform a fail-over. This is because messages, which already arrived on the failing QMgr, will stay in the queues until the QMgr comes up again. MQ cluster provides a busines continuation, that means, further messages, which arrive when one QMgr fails, will be sent to the other QMgr.
What you need is some sort of HA. You did not tell us your platform, but it should be something like HACMP, Veritas, SunHA, MSCS etc. In this case you would have one QMgr on two systems. When one system fails, the HA mechanism would
- switch to the other system
- take-over the MQ disks
- start the QMgr and channels on the other system.
There are several threads in this forum, which explain why not to use MQ clusters within the DMZ. Please use the Search button on the top of this side.
_________________
Regards
Hubert |
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| skoesters |
| Posted: Fri Jun 13, 2008 1:33 am Post subject: |
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Acolyte
Joined: 08 Jun 2008
Posts: 73
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ok, thank you for taking time to answer.
i am using RHEL 5 x86_64 with MQ 6 |
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| HubertKleinmanns |
| Posted: Fri Jun 13, 2008 2:19 am Post subject: |
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Shaman
Joined: 24 Feb 2004
Posts: 732
Location: Germany
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| skoesters wrote: |
ok, thank you for taking time to answer.
i am using RHEL 5 x86_64 with MQ 6 |
I think, then you should use something like Red Hat Cluster Manager.
Or put the MQ data onto a SAN storage, which you may mount to the active node.
_________________
Regards
Hubert |
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| skoesters |
| Posted: Fri Jun 13, 2008 2:23 am Post subject: |
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Acolyte
Joined: 08 Jun 2008
Posts: 73
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danke für die hilfe  |
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| HubertKleinmanns |
| Posted: Fri Jun 13, 2008 2:25 am Post subject: |
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Shaman
Joined: 24 Feb 2004
Posts: 732
Location: Germany
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| skoesters wrote: |
| danke für die hilfe |
Gern geschehen 
_________________
Regards
Hubert |
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| MQWays |
| Posted: Sat Nov 01, 2008 9:28 am Post subject: |
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Acolyte
Joined: 20 Jan 2008
Posts: 61
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| Quote: |
I think, then you should use something like Red Hat Cluster Manager.
Or put the MQ data onto a SAN storage, which you may mount to the active node. |
In reference to the second option above i.e. to put MQ data onto a SAN storage and mount on the active node, how will the failover take place meaning without the HA Cluster software. Can the failover be achieve on RedHat without HA cluster services.
Regards. |
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