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Topic: DBMS (Read 10350 times) |
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kirru
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which of following schemes ensures atomicity?
1. shadow paging 2. deferred data base log modification 3. immediate data base log modification
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TenaliRaman
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I am no special. I am only passionately curious.
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Re: DBMS
« Reply #2 on: Jul 28th, 2011, 11:06am » |
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Actually even (2) ensures atomicity. The only one in your choices that doesn't ensure atomicity is (3).
-- AI
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Self discovery comes when a man measures himself against an obstacle - Antoine de Saint Exupery
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meena05
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Re: DBMS
« Reply #3 on: Aug 23rd, 2011, 7:27am » |
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Meena 
(2) is right option to ensure atomicity in dbms.
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Neetasha
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DBMS
« Reply #4 on: Sep 15th, 2011, 9:17pm » |
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(1.)shadow paging is one of the ensure automatic recovery system in dbms.
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khuram4u
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Re: DBMS
« Reply #5 on: Oct 25th, 2011, 12:02pm » |
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Correct is Shadow paging, as everyone talking about. I would like little explanation.
In Shadow paging, During a transaction, the pages affected by the transaction are copied from the database file into a workspace such as volatile memory, and modified in that workspace. When a transaction is committed, all of the pages that were modified by the transaction are written from the workspace to unused pages in the database file. During execution of the transaction, the state of the database exposed to the user is that is which the database existed prior to the transaction, since the database file still contains the original versions of the modified pages, as they existed before being copied into the workspace if a user accesses the database before the transaction is complete, or upon recovery of failure, it will appear as though the transaction has not occurred.
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newbea
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Re: DBMS
« Reply #6 on: Feb 15th, 2012, 3:25am » |
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Hey, i am developing an android app and i am now searching a dbms for a fast wireless usability. what do you think about that? anybody has experiences and could help me with a short notification? I would rather hit the 'lottozahlen' than finding good information in dev forums.  thanks and best regards
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frankrizal
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Re: DBMS
« Reply #7 on: Feb 21st, 2012, 6:53pm » |
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Well we also did some apps in android.. But it was my partner who's the expert. 
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mbringas
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Re: DBMS
« Reply #8 on: Mar 7th, 2012, 12:05pm » |
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(2) is right option to ensure atomicity in dbms. 
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swedit
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Re: DBMS
« Reply #9 on: Apr 18th, 2012, 6:07am » |
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is there anybody expert in stochastic?? I need probabilities and information about numbers games like mega million, eurojackpot etc. Iam searching reliable sources ^^
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newbea
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Re: DBMS
« Reply #10 on: Apr 25th, 2012, 7:04am » |
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on Apr 18th, 2012, 6:07am, swedit wrote:| Iam searching reliable sources ^^ |
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You are speaking about number games and you want reliable sources?  Nice one! What are searching for? First I would have a look for a study book, eg
amazon.com/Stochastic-Games-Applications-Science-Series/dp/1402014937
greets
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| « Last Edit: May 2nd, 2012, 3:26am by newbea » |
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newbea
Newbie
Posts: 3
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Re: DBMS
« Reply #11 on: May 2nd, 2012, 3:27am » |
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hey..about the eurojackpot I did a quick research on google. check them out for stochastic explanatory notes.
// removed link; didn't work anyway
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| « Last Edit: Jun 26th, 2012, 11:00am by towr » |
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pawanseo
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Re: DBMS
« Reply #12 on: May 2nd, 2012, 11:39pm » |
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shadow paging is your answer
// irrelevant link removed by moderator --SMQ
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| « Last Edit: May 3rd, 2012, 5:29am by SMQ » |
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swedit
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Re: DBMS
« Reply #13 on: Jun 26th, 2012, 10:10am » |
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Done! My app for online lotto is nearly finished. If the usability stress test passes I'll give you the link.
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Grimbal
wu::riddles Moderator
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Re: DBMS
« Reply #14 on: Jun 28th, 2012, 8:47am » |
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irrelevant links will be removed by a moderator
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