| Author |
Message |
 Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
 Forum: IBM MQ Installation/Configuration Support Posted: Wed Sep 19, 2012 6:12 am Subject: T-Rob comment |
Here is something from a recent post by T-Rob on the List-server forum. It relates to an approach for sizing log files:
"...You can
tune the latency between the primary and secondary QMgrs b ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Wed Sep 19, 2012 4:21 am Subject: Related question |
An important related question to all this that would factor into how to size primary log file extents for 'circular' logging.
As noted in the InfoCenter documentation illustrations for long runnin ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Tue Sep 18, 2012 4:57 pm Subject: Gets Freed |
Gets Freed ... a new term of ambiguity.
Do you mean by this ... is no longer needed as a checkpoint and media image was taken moving the Head of the log past this extent and so is no longer needed ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Tue Sep 18, 2012 6:25 am Subject: application serialization |
Yes, application serialization is a key component. Data points must maintain and processed in their sent sequence order.
Not super high throughput put not slow either. 250msg/sec is 15,000 msg/min ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Mon Sep 17, 2012 9:47 pm Subject: a post missed |
Thought I posted this but may not have..
Maybe the 99 other logfiles are called available, kind of like an active pool for logbuffers and when a ratio of active to available hits a threshold percen ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Mon Sep 17, 2012 9:16 pm Subject: rewording and more |
In my previous post I should have said: "... long running trx not crossing more then one logfile ..." (instead of " ...not crossing a checkpoint .."). Anyway ....
Thinking abou ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Mon Sep 17, 2012 8:02 pm Subject: linear |
Bruce said:
1) Primaries are allocated and formatted at qmgr creation. Secondaries are allocated and formatted when needed.
2) When the first primary is filled, the first is closed, and the 2nd is ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Mon Sep 17, 2012 6:28 pm Subject: when is log file formatted |
Still need to understand when the linear log files are allocated and formatted.
This seems to me to be key. If I have 10 logfiles or 100logfiles I will come to the end at some point for either as ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Mon Sep 17, 2012 3:59 pm Subject: Ok now we're talking |
Ok good feedback AndyH.
So how would you allocate your 300MB primary log space?
-lp 300 with each logfile=1mb
-lp 20 with each logfile=15mb
-lp 3 with each logfile=100mb
-lp other with ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Mon Sep 17, 2012 6:42 am Subject: log value |
So how big.
The value in doco says 65535 is max logfilepages at 4k which gives 256MB for each log file. Then the max 511 log files gives a lot of log space.
I keep seeing a number 16384 ... is t ... |
| Topic: C++ and XMS and MI QMGRS |
George Carey
Replies: 21
Views: 22601
|
Forum: IBM MQ API Support Posted: Sun Sep 16, 2012 9:58 am Subject: read it up |
Read it up ... didn't see that interpretation.
Just looking to save time if possible ...
I could save the time to reread to better understand, if I know(as stated ) it works, I can just try impl ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Sun Sep 16, 2012 8:39 am Subject: log file cycling |
Talking about linux boxes with small messages 50-100bytes data payload, relatively high throughput currently 250 msgs/sec going to 500 to 1000 messages/sec over next few years.
What about log file ... |
| Topic: performance and logfiles |
George Carey
Replies: 26
Views: 25510
|
Forum: IBM MQ Installation/Configuration Support Posted: Sat Sep 15, 2012 7:47 pm Subject: performance and logfiles |
Which is better to have:
1.)Small to medium number of logfiles of a larger size or
2.)Medium to Large number of logfiles of a smaller size
What is the trade off?
Cannot figure this out from ... |
| Topic: C++ and XMS and MI QMGRS |
George Carey
Replies: 21
Views: 22601
|
Forum: IBM MQ API Support Posted: Fri Sep 14, 2012 9:25 pm Subject: really |
Oh, really that is effectively what I am looking for then!
No wild cards * are usable with IP selection if I recall? So are IPs denied by default unless authorized ?
I will have to read again w ... |
| Topic: C++ and XMS and MI QMGRS |
George Carey
Replies: 21
Views: 22601
|
Forum: IBM MQ API Support Posted: Thu Sep 13, 2012 8:48 pm Subject: v7.1 |
Yes, 7.1 has much better security features.
Can one in v7.1 block all incoming IPs excepting some ?
Kind of like the setmqaut syntax "-all +inq +connect" for authorizations.
I read ... |
