| Author |
Message
|
| spazy |
 Posted: Sat Jun 19, 2010 7:42 am Post subject: MQ7 multi-instance and clustering |
 |
|
Newbie
Joined: 02 Sep 2008
Posts: 8
|
Hello dear colleagues,
i have two quick questions.
1, How quick is the take over from the active mq to the standby mq.
2, Is possible connect the multi-instance qm to normally to MQ cluster.
Thank for your answers
Best regards
spazy |
|
| Back to top |
|
 |
| Vitor |
| Posted: Sat Jun 19, 2010 3:57 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
|
| spazy wrote: |
| 1, How quick is the take over from the active mq to the standby mq. |
It's as quick as you can perform the takeover. Seriously. If you type slow, don't have it scripted, etc, etc then it can take a while. Likewise it depends on how quickly your network people get on the case.
| spazy wrote: |
| 2, Is possible connect the multi-instance qm to normally to MQ cluster. |
It should be, though I've not tried it personally. Others may have direct experience to offer you.
_________________
Honesty is the best policy.
Insanity is the best defence. |
|
| Back to top |
|
|
| exerk |
| Posted: Sun Jun 20, 2010 1:51 am Post subject: Re: MQ7 multi-instance and clustering |
|
|
Jedi Council
Joined: 02 Nov 2006
Posts: 6339
|
| Vitor wrote: |
| spazy wrote: |
| 1, How quick is the take over from the active mq to the standby mq. |
It's as quick as you can perform the takeover. Seriously. If you type slow, don't have it scripted, etc, etc then it can take a while. Likewise it depends on how quickly your network people get on the case. |
I think the context of this question was in reference to a 'true' MI queue manager, whereas your answer implies an HA queue manager - hopefully the OP will clarify.
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
|
| Back to top |
|
|
| spazy |
| Posted: Sun Jun 20, 2010 7:27 am Post subject: Re: MQ7 multi-instance and clustering |
|
|
Newbie
Joined: 02 Sep 2008
Posts: 8
|
| exerk wrote: |
| Vitor wrote: |
| spazy wrote: |
| 1, How quick is the take over from the active mq to the standby mq. |
It's as quick as you can perform the takeover. Seriously. If you type slow, don't have it scripted, etc, etc then it can take a while. Likewise it depends on how quickly your network people get on the case. |
I think the context of this question was in reference to a 'true' MI queue manager, whereas your answer implies an HA queue manager - hopefully the OP will clarify. |
You have thought right. In the first question I have been thinking the take over in MI queue manager. |
|
| Back to top |
|
|
| exerk |
| Posted: Sun Jun 20, 2010 8:17 am Post subject: Re: MQ7 multi-instance and clustering |
|
|
Jedi Council
Joined: 02 Nov 2006
Posts: 6339
|
| spazy wrote: |
| exerk wrote: |
| Vitor wrote: |
| spazy wrote: |
| 1, How quick is the take over from the active mq to the standby mq. |
It's as quick as you can perform the takeover. Seriously. If you type slow, don't have it scripted, etc, etc then it can take a while. Likewise it depends on how quickly your network people get on the case. |
I think the context of this question was in reference to a 'true' MI queue manager, whereas your answer implies an HA queue manager - hopefully the OP will clarify. |
You have thought right. In the first question I have been thinking the take over in MI queue manager. |
In which case the answer is: as long as the standby queue manager takes to detect that the file-locks have released, and the standby restarts the queue manager. I would guess the metrics will depend on OS and other considerations.
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
|
| Back to top |
|
|
| Vitor |
| Posted: Sun Jun 20, 2010 1:02 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
|
| exerk wrote: |
| In which case the answer is: as long as the standby queue manager takes to detect that the file-locks have released, and the standby restarts the queue manager. I would guess the metrics will depend on OS and other considerations. |
How long does it take for the standby to take over the IP of the original queue manager?
_________________
Honesty is the best policy.
Insanity is the best defence. |
|
| Back to top |
|
|
| mqjeff |
| Posted: Sun Jun 20, 2010 1:40 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand Master
Joined: 25 Jun 2008
Posts: 17447
|
| Vitor wrote: |
| exerk wrote: |
| In which case the answer is: as long as the standby queue manager takes to detect that the file-locks have released, and the standby restarts the queue manager. I would guess the metrics will depend on OS and other considerations. |
How long does it take for the standby to take over the IP of the original queue manager? |
Write this in blood on the wall of your office.
MQ Multi-Instance DOES NOT DO IP failover.
please note I do not specify who's blood, and do not tell me either
MI queue managers can participate in MQ clusters to the extent that the MQ clusters can support MI queue managers... which pretty much means they all have to be at 7.0.1 level and support multiple entries in the conname field. Why, you ask? Go read the blood on your wall. |
|
| Back to top |
|
|
| Vitor |
| Posted: Sun Jun 20, 2010 2:18 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
|
| mqjeff wrote: |
Write this in blood on the wall of your office.
MQ Multi-Instance DOES NOT DO IP failover.
|
This is kind of the point I was getting at. If you're not using v7 & multiple connames, failover takes as long as it takes to revise the hostname.
_________________
Honesty is the best policy.
Insanity is the best defence. |
|
| Back to top |
|
|
| fjb_saper |
| Posted: Sun Jun 20, 2010 4:16 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
|
| Vitor wrote: |
| This is kind of the point I was getting at. If you're not using v7 & multiple connames, failover takes as long as it takes to revise the hostname. |
Your assumption here is that they used best practice and used host names in channels. I have seen clusters using IPs... 
_________________
MQ & Broker admin |
|
| Back to top |
|
|
| mqjeff |
| Posted: Sun Jun 20, 2010 4:43 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand Master
Joined: 25 Jun 2008
Posts: 17447
|
| Vitor wrote: |
| mqjeff wrote: |
Write this in blood on the wall of your office.
MQ Multi-Instance DOES NOT DO IP failover.
|
This is kind of the point I was getting at. If you're not using v7 & multiple connames, failover takes as long as it takes to revise the hostname. |
OP's point all along has been that they are using v7 and MI qmgrs which therefore must be using multi-valued connames.... |
|
| Back to top |
|
|
| Vitor |
| Posted: Sun Jun 20, 2010 5:14 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
|
| fjb_saper wrote: |
| Vitor wrote: |
| This is kind of the point I was getting at. If you're not using v7 & multiple connames, failover takes as long as it takes to revise the hostname. |
Your assumption here is that they used best practice and used host names in channels. I have seen clusters using IPs... |
I should have said "revise the host names or alter the channel connames".
_________________
Honesty is the best policy.
Insanity is the best defence. |
|
| Back to top |
|
|
| Vitor |
| Posted: Sun Jun 20, 2010 5:18 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
|
| mqjeff wrote: |
| OP's point all along has been that they are using v7 and MI qmgrs which therefore must be using multi-valued connames.... |
With respect, no they mustn't and there's nothing in the post to suggest they're using v7 throughout their estate.
Just trying to underline some of the differences & requirements for using MI as HA.
_________________
Honesty is the best policy.
Insanity is the best defence. |
|
| Back to top |
|
|
| exerk |
| Posted: Sun Jun 20, 2010 10:22 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Jedi Council
Joined: 02 Nov 2006
Posts: 6339
|
| fjb_saper wrote: |
| ...Your assumption here is that they used best practice and used host names in channels. I have seen clusters using IPs... |
Host names will also fail for < V7.0.1 queue managers to an MI queue manager in a cluster.
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
|
| Back to top |
|
|
| exerk |
| Posted: Sun Jun 20, 2010 10:28 pm Post subject: Re: MQ7 multi-instance and clustering |
|
|
Jedi Council
Joined: 02 Nov 2006
Posts: 6339
|
| Vitor wrote: |
| mqjeff wrote: |
| OP's point all along has been that they are using v7 and MI qmgrs which therefore must be using multi-valued connames.... |
With respect, no they mustn't and there's nothing in the post to suggest they're using v7 throughout their estate.
Just trying to underline some of the differences & requirements for using MI as HA. |
Nothing explicit, but the OP did state in a follow-up post "...You have thought right. In the first question I have been thinking the take over in MI queue manager...", and I think there are very few (if any) organisations anywhere that will have all their estate at V7.0.1, so still a valid point.
_________________
It's puzzling, I don't think I've ever seen anything quite like this before...and it's hard to soar like an eagle when you're surrounded by turkeys. |
|
| Back to top |
|
|
| mqjeff |
| Posted: Mon Jun 21, 2010 2:26 am Post subject: |
|
|
Grand Master
Joined: 25 Jun 2008
Posts: 17447
|
| What, um, what is the *title* of this thread, again? |
|
| Back to top |
|
|
|
|
