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| Logging concept |
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| keniav |
 Posted: Fri Jul 07, 2006 5:37 am Post subject: Logging concept |
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Novice
Joined: 26 May 2006
Posts: 24
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Hi all,
I have a question. Might be simple but i appreciate if you clarify me on this.
There are two types of logging, Circular and Linear. By default it is circular. What are the circumstances which lead us to choose Linear Logging?(i mean is there any reason other than the provision for Media recovery)
Suppose say, I'm using Circular logging and when all three log files get filled, i'm saving the third log file to a disk, so do I need Linear Logging?
2. Suppose say, I'm using Circular Logging and I met with a rare situation where I need to do a media recovery. So, is it possible to do a media recovery (even though I'm using Circular Logging till now) by changing the mode to Linear Logging and do the recovery?
I appreciate your reply
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| wschutz |
| Posted: Fri Jul 07, 2006 7:15 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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No, that will not work. You need a media recovery image in the log to recover a corrupted object file, and circular logging doesn't support taking recovery images.
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-wayne |
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| Vitor |
| Posted: Fri Jul 07, 2006 12:32 pm Post subject: Re: Logging concept |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| keniav wrote: |
So, is it possible to do a media recovery (even though I'm using Circular Logging till now) by changing the mode to Linear Logging and do the recovery?
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You can't change log mode - it's fixed when you create the queue manager.
Spend more time reading the manuals, especially the System Administration one. 
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Honesty is the best policy.
Insanity is the best defence. |
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| wschutz |
| Posted: Fri Jul 07, 2006 4:07 pm Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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but you CAN hack the LogType in the qm.ini file.  (but, of course doing that isn't supported  )
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-wayne |
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| fjb_saper |
| Posted: Fri Jul 07, 2006 7:32 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| wschutz wrote: |
| but you CAN hack the LogType in the qm.ini file. (but, of course doing that isn't supported ) |
And experience tells if you want to go the hack way there is much more involved than just changing the value in the ini file... 
)
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