storage is soooooooo cheap compared to an outage to your business.
Buy
Big Drives!
-----Original Message-----
From: MQSeries List [mailto:[EMAIL PROTECTED]On Behalf Of [EMAIL PROTECTED]
Sent: Monday, April 17, 2006 2:18 PM
To: [email protected]
Subject: Re: sizing disk space on AIX
What I've done in the past, is to figure out how much disk (I think) I would need to hold a full days worth of messages, assuming that for some unknown reason, I cannot move them along. Then, I would add a fudge factor (25%). Maybe I should add whip cream as well.
Robert Broderick <[EMAIL PROTECTED]>
Sent by: MQSeries List <[email protected]>04/17/2006 01:58 PM
MQSeries List <[email protected]>
[email protected] Re: sizing disk space on AIX
That would be goo if you had two applications and both sent in the same amount of messages per hour/day/week/month. What you need to do is figure out what each application will send in numbers and size. Per QMGR. THis would include both intr and extr QMGR messages. Now if your QMGR and application are humming along perfectly you could basically say How much space do I need within one hour. Ahhhh but this isn't a perfect world. So now you have to start considering what happens when some bonehead for the receiving application puts in a code change and the pitcher throw the ball and there is no one there to catch it. How long will it be OK for this condition to exist. Will the pitcher keep throwing the ball. You could end up drowning the umpire!! Now, what happens in a failover situation. Things have to move and it will be a good bet ALL the applications will not come up perfect. You need somewhere to store these messages. What do the SLA's indicate. I will tell you. In a DR there will be a lot of yelling later on but you can use your SLA in the bathroom as paper.
So what I usually do, and everyone is different, but the main idea is to be safe. I figure out what a day would cost me in bytes. I multiple that by two for matrixes' that were not correct and then by 2 for two days worth of work. If this comes in nice you will have plenty of room to grow. Oh....that was something else I forgot to mention!!!! Once you buy the storage it is static in cost. But you do not want to go back to infrastructure 6 months (if you can last that long) and tell them you need to purchase MORE hardware. Hit them hard and hit them fast I always say!!!
Just my 1.588798566354373389 cents
bobbee
Date: Mon, 17 Apr 2006 12:35:19 -0400
From: [EMAIL PROTECTED]
Subject: sizing disk space on AIX
To: [email protected]
It's more of a general question regarding sizing disk space on unix. Unlike the mainframe, where a couple of formulas are provided to help you size the disk space needed for a queue manager, there isn't anything like that for unix. What are others doing? Are they simply taking the average size of all messages, slapping on the MQMD and XMIT header, and then converting that into total bytes required? Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com
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