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| KAKA123 |
 Posted: Wed Feb 29, 2012 11:32 pm Post subject: Multi-instance issue |
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Novice
Joined: 23 Feb 2012
Posts: 13
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Dear All,
I hope you fine all.
I need a help from you
I create QM as multi-instanse on two server(suse 10.1) and after I complete the crating exercise and issue the command endmqm -is QM to swith from active to standby I got thr follwoing error
AMQ7276: WebSphere MQ queue manager cannot switch over.
also I have one more question
I use shared disk to create the QM and my question is
Do I need to mount this share disk on both server at the same time or the nfs service will do this and I must mount it on one server???
please help me dear
thanks in adance  |
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| rammer |
| Posted: Thu Mar 01, 2012 3:53 am Post subject: |
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Partisan
Joined: 02 May 2002
Posts: 359
Location: England
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| mqjeff |
| Posted: Thu Mar 01, 2012 4:57 am Post subject: Re: Multi-instance issue |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| KAKA123 wrote: |
| mount this share disk on both server at the same time |
Make sure you are using NFS v4. Make sure you are using an NFS server that supports advisory file locking, and does not require mandatory file locking.
Make sure you can use amqsfsck successfully.
Make sure you have strmqm on both machines before you attempt to switch over.
As a side note, the word "dear" is used as a term of affection in most English dialects. It's not entirely appropriate for a business or professional setting. And this forum is entirely a professional setting. |
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| KAKA123 |
| Posted: Fri Mar 02, 2012 11:31 pm Post subject: |
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Novice
Joined: 23 Feb 2012
Posts: 13
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Mr. Rammer
I already use this link but I found this steps are not suitable for production because if the server one goes down then nothing will work as the server 2 point the mount from server 1. Is this right?
Mr.Mqjeff
thank you for your advise and please answer me the above question |
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| bruce2359 |
| Posted: Sat Mar 03, 2012 6:32 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| KAKA123 wrote: |
| ... not suitable for production because if the server one goes down then nothing will work as the server 2 point the mount from server 1. Is this right? |
If properly installed and configured, MI will work for the precise reason you say that it won't.
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| mqjeff |
| Posted: Sat Mar 03, 2012 6:59 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| KAKA123 wrote: |
Mr.Mqjeff
thank you for your advise and please answer me the above question |
I have answered all of the questions you have asked. |
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| Vitor |
| Posted: Sat Mar 03, 2012 4:22 pm Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| KAKA123 wrote: |
| I already use this link but I found this steps are not suitable for production because if the server one goes down then nothing will work as the server 2 point the mount from server 1. Is this right? |
If you're right, what use is shared disk?
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| bruce2359 |
| Posted: Sat Mar 03, 2012 6:17 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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Here's a document worth reading: Testing and support statement for WebSphere MQ multi-instance queue managers.
Find it here: http://www-01.ibm.com/support/docview.wss?uid=swg21433474
_________________
I like deadlines. I like to wave as they pass by.
ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| KAKA123 |
| Posted: Sat Mar 03, 2012 8:28 pm Post subject: |
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Novice
Joined: 23 Feb 2012
Posts: 13
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Mr.Vitor If I use Network attached storage this is good but the steps in the below link shows that server 2 will know about the shared disk by server 1 from his IP so if this IP goes down how will server 2 see the shared disk. Is this right?
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/index.jsp?topic=%2Fcom.ibm.mq.amqzag.doc%2Ffa70159_.htm
Server1:Discover the host name or IP address of server 1: ifconfig
Server2:Mount the exported file system /MQHA:
Start of changemount -t nfs4 -o hard,intr 192.168.217.130:/ /MQHAEnd of change |
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| fjb_saper |
| Posted: Sun Mar 04, 2012 2:20 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| mqjeff |
| Posted: Sun Mar 04, 2012 7:24 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| KAKA123 wrote: |
| Mr.Vitor If I use Network attached storage this is good but the steps in the below link shows that server 2 will know about the shared disk by server 1 from his IP so if this IP goes down how will server 2 see the shared disk. Is this right? |
You continue to believe that it is part of the correct setup to have the shared disk physically part of one of the two machines.
It must be on a *third* machine. |
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| Vitor |
| Posted: Sun Mar 04, 2012 7:34 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| KAKA123 wrote: |
| Is this right? |
_________________
Honesty is the best policy.
Insanity is the best defence. |
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| bruce2359 |
| Posted: Sun Mar 04, 2012 7:40 am Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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| KAKA123 |
| Posted: Mon Mar 05, 2012 2:48 am Post subject: |
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Novice
Joined: 23 Feb 2012
Posts: 13
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hi experts
may be I didn't explain right and I didn't get you.
please can any one explain to me how this work
Server1:Discover the host name or IP address of server 1: ifconfig
Server2:Mount the exported file system /MQHA:
Start of changemount -t nfs4 -o hard,intr 192.168.217.130:/ /MQHAEnd of change
if 192.168.217.130 goes down or server 1 crashed how server 2 see the shared disk
note: this command written by IBM and this is the link
http://publib.boulder.ibm.com/infocenter/wmqv7/v7r0/index.jsp?topic=%2Fcom.ibm.mq.amqzag.doc%2Ffa70159_.htm |
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| vennela |
| Posted: Mon Mar 05, 2012 5:09 am Post subject: |
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Jedi Knight
Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India
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For testing purposes, you can just use two machines and share the file system between the two. It CAN be done this way. But like you said, if the machine hosting the filesystem goes down, then you will have a single point of failure. So, ideally this filesystem should be some kind of SAN, Network File System that is independent of these two. I am not a storage expert, so I don't know how this is achieved, but I think this kind of shared disk is common.
In the manual, the steps are mentioned just to use two systems so that people like us, MQ admins can set this up without the help of storage people.
Also, machine going down is not the only failure that can happen. There could be other reasons why MQ went down on that machine and everything else still continue to work. |
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