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тАО02-09-2009 07:47 AM
тАО02-09-2009 07:47 AM
I tested on a smaller table and the result of using pipe is not what I expected. The pipe is as big as I unload to a data file, generating a large intermediate file. On top of that, the load shell can terminate while the unload is not finished. These just donтАЩt show much benefit of using pipe over a normal way of тАЬunload to file, and then load back from the fileтАЭ. I think I didnтАЩt use pipe properly. Could you gurus give me some advice ?
Thanks,
Chushia
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тАО02-09-2009 08:19 AM
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тАО02-09-2009 08:36 AM
тАО02-09-2009 08:36 AM
Re: Use pipe to unload/load database tables
I forgot to do a mkfifo ... now it's working as I expected.
Thanks!
Chushia
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тАО02-09-2009 04:03 PM
тАО02-09-2009 04:03 PM
Re: Use pipe to unload/load database tables
All I've ever used is mknod -p. I've read the man pages, and I fail to see a difference.
Can you enlighten me as to why mkfifo is different/better thank mknod -p? Other than in this case, it works... but why?
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тАО02-09-2009 04:52 PM
тАО02-09-2009 04:52 PM
Re: Use pipe to unload/load database tables
Because mkfifo(1) does what its name implies and nothing else. It also has -p and -m.
Also its option is on the correct side of the filename (left).
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тАО02-09-2009 05:16 PM
тАО02-09-2009 05:16 PM
Re: Use pipe to unload/load database tables
Hein.
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тАО02-10-2009 07:16 PM
тАО02-10-2009 07:16 PM