Re: NPMCLASS
They needed to add some new questions to the certification exam :-) bee-oh-dubble0bee-dubble-egh From: Bruce Giordano <[EMAIL PROTECTED]> Reply-To: MQSeries List <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: Re: NPMCLASS Date: Fri, 27 Feb 2004 10:12:52 -0500 This parameter seems a little odd to me. It seems like by definition, non-persistent messages shouldn't persist across a queue manager restart. Not sure why IBM saw the need to create a new "sort of persistent" message. - Bruce Giordano "Adiraju, Rao" <[EMAIL PROTECTED]>To: [EMAIL PROTECTED] cc: Sent by: MQSeries List Subject: Re: NPMCLASS <[EMAIL PROTECTED]> Thursday February 26, 2004 10:16 PM Please respond to MQSeries List Did anybody get back to you on this. The doco which comes along with CSD06 give the full explanation of this field and here is the extract: New Queue Attribute This WebSphere MQ V5.3 update introduces a new queue attribute NPMCLASS which applies to local and model queues. NPMCLASS can take one of two values: 1.NPMCLASS(NORMAL) - This is the default value and indicates that non-persistent messages on this queue are only lost following a failure, or a queue manager shutdown. These messages will be discarded in the event of a queue manager restart. 2.NPMCLASS(HIGH) - This setting enables non-persistent messages on this queue to be retained across a queue manager restart. Non-persistent messages may still be lost in the event of a failure. Cheers Rao -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 25 February 2004 2:38 AM To: [EMAIL PROTECTED] Subject: NPMCLASS What is the purpose of NPMCLASS? AAC Kunio Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive This communication is confidential and may contain privileged material. If you are not the intended recipient you must not use, disclose, copy or retain it. If you have received it in error please immediately notify me by return email and delete the emails. Thank you. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive _ Say good-bye to spam, viruses and pop-ups with MSN Premium -- free trial offer! http://click.atdmt.com/AVE/go/onm00200359ave/direct/01/ Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
Yes. It's one thing to lose messages when the system crashes, but I've always had trouble defending the loss of perfectly good messages during a graceful shutdown. Now we can queues that survive a routine restart without the performance penalty of persistence. Seems like low-hanging fruit, to me. -Original Message- From: Jim Ford [mailto:[EMAIL PROTECTED] Sent: Friday, February 27, 2004 7:49 AM To: [EMAIL PROTECTED] Subject: Re: NPMCLASS It does seem odd, but also kind of useful. To me it means that you can have a class of message that are sort of persistent, but any logging is deferred until the qmgr shuts down. So you get the performance benefits of a NP message yet there's persistence, too. I suppose it means that the shutdown takes longer, and a crash means your messages are lost, so I don't see that we'll use it that much. Does that analysis sound correct? Bruce Giordano <[EMAIL PROTECTED]To: [EMAIL PROTECTED] ENTIAL.COM> cc: Sent by: MQSeries Subject: Re: NPMCLASS List <[EMAIL PROTECTED] c.at> 02/27/2004 09:12 AM Please respond to MQSeries List This parameter seems a little odd to me. It seems like by definition, non-persistent messages shouldn't persist across a queue manager restart. Not sure why IBM saw the need to create a new "sort of persistent" message. - Bruce Giordano "Adiraju, Rao" <[EMAIL PROTECTED]>To: [EMAIL PROTECTED] cc: Sent by: MQSeries List Subject: Re: NPMCLASS <[EMAIL PROTECTED]> Thursday February 26, 2004 10:16 PM Please respond to MQSeries List Did anybody get back to you on this. The doco which comes along with CSD06 give the full explanation of this field and here is the extract: New Queue Attribute This WebSphere MQ V5.3 update introduces a new queue attribute NPMCLASS which applies to local and model queues. NPMCLASS can take one of two values: 1.NPMCLASS(NORMAL) - This is the default value and indicates that non-persistent messages on this queue are only lost following a failure, or a queue manager shutdown. These messages will be discarded in the event of a queue manager restart. 2.NPMCLASS(HIGH) - This setting enables non-persistent messages on this queue to be retained across a queue manager restart. Non-persistent messages may still be lost in the event of a failure. Cheers Rao -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 25 February 2004 2:38 AM To: [EMAIL PROTECTED] Subject: NPMCLASS What is the purpose of NPMCLASS? AAC Kunio Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive This communication is confidential and may contain privileged material. If you are not the intended recipient you must not use, disclose, copy or retain it. If you have received it in error please immediately notify me by return email and delete the emails. Thank you. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
Hello, >>>It does seem odd, but also kind of useful. To me it means that >>>you can have a class of message that are sort of persistent, but >>>any logging is deferred until the qmgr shuts down. So you get >>>the performance benefits of a NP message yet there's persistence, >>>too. I suppose it means that the shutdown takes longer, and a >>>crash means your messages are lost, so I don't see that we'll >>>use it that much. I would say that's a fair assessment. Technically there really isn't any logging done, even at shutdown - what is done is that the messages are hardened to the queue-backing files, which will take some amount of time. Also, there may be a bit of a delay when opening a queue the first time of the day, as the queue buffer will be populated with any NP messages that might have been on the queue across a restart. I doubt this would be a significant delay, though. One caveat might be that there are some times when an application was developed to 'expect' queues to be empty in the morning, because they 'know' that the QM has just been restarted - kind of akin to overnight expiry. Another warning I was given was to be careful when switching the NPMCLASS(HIGH) attribute on for a queue, because once you do so you will not be able to back off CSD06 without deleting/redefining the queue - the reason is that a pre-CSD06 QM will interpret a queue with NPMCLASS(HIGH) attribute as a damaged object. Regards, Christopher Frank Certified I/T Specialist - WebSphere Software IBM Certified Solutions Expert - Websphere MQ & MQ Integrator -- Phone: 612-397-5532 (t/l 653-5532) mobile: 612-669-3008 e-mail: [EMAIL PROTECTED] Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
G'Day, I believe that this was done to enable IBM to conform to a requirement in the JMS spec (pub/sub) without unduly impacting overall messaging performance, i.e. using real MQ persistent messages would mean a performance 'hit'. CheersDale R. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
I can't see a tremendous use for it, but when new features are needed for a release I can see this being an easy feature to provide. "Bruce Giordano" <[EMAIL PROTECTED]> Sent by: "MQSeries List" <[EMAIL PROTECTED]> 02/27/2004 10:12 AM Please respond to "MQSeries List" To: [EMAIL PROTECTED] cc: Subject: Re: NPMCLASS This parameter seems a little odd to me. It seems like by definition, non-persistent messages shouldn't persist across a queue manager restart. Not sure why IBM saw the need to create a new "sort of persistent" message. - Bruce Giordano "Adiraju, Rao" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Sent by: MQSeries List Subject: Re: NPMCLASS <[EMAIL PROTECTED]> Thursday February 26, 2004 10:16 PM Please respond to MQSeries List Did anybody get back to you on this. The doco which comes along with CSD06 give the full explanation of this field and here is the extract: New Queue Attribute This WebSphere MQ V5.3 update introduces a new queue attribute NPMCLASS which applies to local and model queues. NPMCLASS can take one of two values: 1.NPMCLASS(NORMAL) - This is the default value and indicates that non-persistent messages on this queue are only lost following a failure, or a queue manager shutdown. These messages will be discarded in the event of a queue manager restart. 2.NPMCLASS(HIGH) - This setting enables non-persistent messages on this queue to be retained across a queue manager restart. Non-persistent messages may still be lost in the event of a failure. Cheers Rao -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 25 February 2004 2:38 AM To: [EMAIL PROTECTED] Subject: NPMCLASS What is the purpose of NPMCLASS? AAC Kunio Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive This communication is confidential and may contain privileged material. If you are not the intended recipient you must not use, disclose, copy or retain it. If you have received it in error please immediately notify me by return email and delete the emails. Thank you. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive The information contained in this message may be CONFIDENTIAL and is for the intended addressee only. Any unauthorized use, dissemination of the information, or copying of this message is prohibited. If you are not the intended addressee, please notify the sender immediately and delete this message.
Re: NPMCLASS
It does seem odd, but also kind of useful. To me it means that you can have a class of message that are sort of persistent, but any logging is deferred until the qmgr shuts down. So you get the performance benefits of a NP message yet there's persistence, too. I suppose it means that the shutdown takes longer, and a crash means your messages are lost, so I don't see that we'll use it that much. Does that analysis sound correct? Bruce Giordano <[EMAIL PROTECTED]To: [EMAIL PROTECTED] ENTIAL.COM> cc: Sent by: MQSeries Subject: Re: NPMCLASS List <[EMAIL PROTECTED] c.at> 02/27/2004 09:12 AM Please respond to MQSeries List This parameter seems a little odd to me. It seems like by definition, non-persistent messages shouldn't persist across a queue manager restart. Not sure why IBM saw the need to create a new "sort of persistent" message. - Bruce Giordano "Adiraju, Rao" <[EMAIL PROTECTED]>To: [EMAIL PROTECTED] cc: Sent by: MQSeries List Subject: Re: NPMCLASS <[EMAIL PROTECTED]> Thursday February 26, 2004 10:16 PM Please respond to MQSeries List Did anybody get back to you on this. The doco which comes along with CSD06 give the full explanation of this field and here is the extract: New Queue Attribute This WebSphere MQ V5.3 update introduces a new queue attribute NPMCLASS which applies to local and model queues. NPMCLASS can take one of two values: 1.NPMCLASS(NORMAL) - This is the default value and indicates that non-persistent messages on this queue are only lost following a failure, or a queue manager shutdown. These messages will be discarded in the event of a queue manager restart. 2.NPMCLASS(HIGH) - This setting enables non-persistent messages on this queue to be retained across a queue manager restart. Non-persistent messages may still be lost in the event of a failure. Cheers Rao -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 25 February 2004 2:38 AM To: [EMAIL PROTECTED] Subject: NPMCLASS What is the purpose of NPMCLASS? AAC Kunio Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive This communication is confidential and may contain privileged material. If you are not the intended recipient you must not use, disclose, copy or retain it. If you have received it in error please immediately notify me by return email and delete the emails. Thank you. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
This parameter seems a little odd to me. It seems like by definition, non-persistent messages shouldn't persist across a queue manager restart. Not sure why IBM saw the need to create a new "sort of persistent" message. === Seems to me that if you rely heavily upon the speed of non-persistant messages, then these messages should not be deleted for normal queue manager down times. If you stop the queue manager nightly to do backups, then you dont want to lose normal transaction traffic. After all it is normal system down time. On the other hand, if the queue manager or sytem has a catastrophic failure then loss of non-persistant messages is expected. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
This parameter seems a little odd to me. It seems like by definition, non-persistent messages shouldn't persist across a queue manager restart. Not sure why IBM saw the need to create a new "sort of persistent" message. - Bruce Giordano "Adiraju, Rao" <[EMAIL PROTECTED]>To: [EMAIL PROTECTED] cc: Sent by: MQSeries List Subject: Re: NPMCLASS <[EMAIL PROTECTED]> Thursday February 26, 2004 10:16 PM Please respond to MQSeries List Did anybody get back to you on this. The doco which comes along with CSD06 give the full explanation of this field and here is the extract: New Queue Attribute This WebSphere MQ V5.3 update introduces a new queue attribute NPMCLASS which applies to local and model queues. NPMCLASS can take one of two values: 1.NPMCLASS(NORMAL) - This is the default value and indicates that non-persistent messages on this queue are only lost following a failure, or a queue manager shutdown. These messages will be discarded in the event of a queue manager restart. 2.NPMCLASS(HIGH) - This setting enables non-persistent messages on this queue to be retained across a queue manager restart. Non-persistent messages may still be lost in the event of a failure. Cheers Rao -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 25 February 2004 2:38 AM To: [EMAIL PROTECTED] Subject: NPMCLASS What is the purpose of NPMCLASS? AAC Kunio Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive This communication is confidential and may contain privileged material. If you are not the intended recipient you must not use, disclose, copy or retain it. If you have received it in error please immediately notify me by return email and delete the emails. Thank you. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
Did anybody get back to you on this. The doco which comes along with CSD06 give the full explanation of this field and here is the extract: New Queue Attribute This WebSphere MQ V5.3 update introduces a new queue attribute NPMCLASS which applies to local and model queues. NPMCLASS can take one of two values: 1.NPMCLASS(NORMAL) - This is the default value and indicates that non-persistent messages on this queue are only lost following a failure, or a queue manager shutdown. These messages will be discarded in the event of a queue manager restart. 2.NPMCLASS(HIGH) - This setting enables non-persistent messages on this queue to be retained across a queue manager restart. Non-persistent messages may still be lost in the event of a failure. Cheers Rao -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 25 February 2004 2:38 AM To: [EMAIL PROTECTED] Subject: NPMCLASS What is the purpose of NPMCLASS? AAC Kunio Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive This communication is confidential and may contain privileged material. If you are not the intended recipient you must not use, disclose, copy or retain it. If you have received it in error please immediately notify me by return email and delete the emails. Thank you. Instructions for managing your mailing list subscription are provided in the Listserv General Users Guide available at http://www.lsoft.com Archive: http://vm.akh-wien.ac.at/MQSeries.archive
Re: NPMCLASS
(BIf you need to keep non-persistent messages
(Bacross a controlled shutdown of a distributed qmanager.
(BIt appears that during a qmanager quiese it
(Bwill write the message to the log, but not otherwise.
(BSo there will be no persistent
(Bmessage overhead normally; only during a controlled shutdown.
(BI guess it would help during maintenance
(Bshutdowns
(B
(B
(B
(B
(B
(B
(B
(B
(B
(B
(B" $B4];37{0l (B"
(B<[EMAIL PROTECTED]>
(BSent by: "MQSeries List"
(B<[EMAIL PROTECTED]>
(B02/24/2004 08:37 AM
(BPlease respond to "MQSeries
(BList"
(B
(B
(B To:
(B [EMAIL PROTECTED]
(B cc:
(B
(B Subject:
(B NPMCLASS
(B
(B
(B
(BWhat is the purpose of NPMCLASS?
(B
(BAAC
(BKunio
(B
(BInstructions for managing your mailing list subscription are provided in
(Bthe Listserv General Users Guide available at http://www.lsoft.com
(BArchive: http://vm.akh-wien.ac.at/MQSeries.archive
(B
(B
(B
(B
(BThe information contained in this message may be CONFIDENTIAL and is for
(Bthe intended addressee only. Any unauthorized use, dissemination of the
(Binformation, or copying of this message is prohibited. If you are not the
(Bintended addressee, please notify the sender immediately and delete this
(Bmessage.
(B
NPMCLASS
What is the purpose of NPMCLASS? (B (BAAC (BKunio (B (BInstructions for managing your mailing list subscription are provided in (Bthe Listserv General Users Guide available at http://www.lsoft.com (BArchive: http://vm.akh-wien.ac.at/MQSeries.archive
