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| cots |
 Posted: Tue May 25, 2004 8:10 am Post subject: URGENT: Installation Disk Space Require |
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Centurion
Joined: 16 Jun 2003
Posts: 105
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Hi All,
I have been asked to come up with a specs of disk space require to install MQ5.3 and MQSI 2.1 on AIX box. Can someone pls verify my calculation below and pls add your suggestion if I have missed anything else which need to be considered.
MQ5.3 software: 150MB
LOG file: (1024x4kb) x 25 x9 = ~140mb
Total for MQ installation and data storage needed is: ~300mb but if I reserved for 500MB should be big enough
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JDK: 850MB (needed for MQSI installation)
MQSI: 550mb
Total for MQSI installation and data storage needed is: ~ 2 GB ( should be plenty enough)
Those are calculation. am I on the right track? pls response if you know.
thx in advance |
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| tkane |
| Posted: Tue May 25, 2004 8:19 am Post subject: |
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Voyager
Joined: 23 Dec 2002
Posts: 82
Location: Kansas City
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You really need to consider space for the messages on the queues.
They need to go into /var/mqm
And logging in /var/mqm/log. If you're dealing with persistent messages they need to be logged. If you don't have enough log space for a unit of work messages will be backed out.
You need to consider what happens if your applicaiton goes down and messages are piling up in your queues as well.
In recent installs that my group has been doing on AIX or HP we've asked for 1 GB for logs and 1 GB for queue space.
We're considering if we should increase that to 4 GB each.
Storage prices on Unix have gone down considerablely in recent years and sizes of devices have gone way up.
Good Luck
Tom |
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| fschofer |
| Posted: Tue May 25, 2004 9:19 am Post subject: |
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Knight
Joined: 02 Jul 2001
Posts: 524
Location: Mainz, Germany
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Hi,
i recommend to use the maximum size for qmgr log files
1024x4kb is only the default value and cannot be changed after qmgr creation.
You can always change the number of primary and secondary log files which in total cannot exceed 63.
>>JDK: 850MB (needed for MQSI installation)
are you sure this number is correct, a typical windows jdk does not take more than 80 MB
Do not forget the space required for DB2 and the broker database.
WMQI usertraces also can take a lot of space especially if your developers do a lot of debug tracing (about 50MB for very large traces).
Its also not uncommon to have several queue managers and brokers on one server.
Greetings
Frank |
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| cots |
| Posted: Tue May 25, 2004 10:07 am Post subject: |
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Centurion
Joined: 16 Jun 2003
Posts: 105
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Thank you all for the response.
Tom, you mentioned that you have 1 GB for logs and 1 GB for queue space. may I asked, How do you come up with the 1 GB for each? I guest I need a bit of more details so I can do the analysis that can fit my system.
Thanks, |
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| tkane |
| Posted: Tue May 25, 2004 11:12 am Post subject: |
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Voyager
Joined: 23 Dec 2002
Posts: 82
Location: Kansas City
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The 1GB for each grew as a rusult of different applications running out of space on different systems. We're really a mixed bag of stuff. Not much MQSI but 10 or 20 major applications running on 200+ unix queue managers.
We have found that our applciations have a hard time estimating their volume. And then they grow. But the space require on disk for each message has to include the MQMD header. Then depending on if your data is a fixed length or if it varies, you may have to work with averages.
Personally I'd like a tool that could track MQ volume in the background, maybe the API Exit and keep a count of messages and average message length. Then spew it out either hourly or daily. That would let me do planning for my filesystems for logs and queues. But right now I don't have something like that so we have to make estimates and sometimes recover from file system full conditions.
MQ deals with that better today then it did 4 or 5 years ago, but it's still something that if you can spend a few hundred or thousand dollars up front and have enough space that you never have to deal with it. You're that much happier.
Good Luck
Tom |
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| fschofer |
| Posted: Tue May 25, 2004 12:24 pm Post subject: |
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Knight
Joined: 02 Jul 2001
Posts: 524
Location: Mainz, Germany
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Hi Tom,
| Quote: |
| Personally I'd like a tool that could track MQ volume in the background, maybe the API Exit and keep a count of messages and average message length. Then spew it out either hourly or daily. |
Take a look at
http://www.bristol.com/transactionvision/
Some years ago i had a trial version of the product (former called esleuth)
for some weeks, maybe the right tool for you.
Greetings
Frank |
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