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GeekInterview.com > Interview Questions > Data Warehousing > Abinitio
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Question: Phase verses Checkpoint
Answer: Difference between a phase and checkpoint as far as i know it something related with how temporary files containing the data landed to disk is handled.
that is phases are used to break up a graph so that it does not use up all the memory , it reduce the no of component running in parallel hence improves the performances (used for performance fine tuning, by managing the resource in perfect manner)
Check points are used for the purpose of recovery. |
| April 04, 2009 06:43:42 |
#5 |
| annegrace1 |
Member Since: August 2008 Total Comments: 11 |
RE: Phase verses Checkpoint
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Above GDE version 1.8 checkpoint is automatic.
Phasing is when you design the graph it should not have more than 20 components. In that particular phase the component in that phase will alone run.
Check point is also associated with phasing. We can see a blue color block filled around the phasing that is check point. When the execution of the graph is interrupted and it has fetched 10,000 record. when you re-run the graph, it will ask for option restart or continue. So checkpoint is used to run the graph from where its interrupted. |
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