thanks for your reply. Let me explain more clearly, since Map Reduce is just one step of my program, I need to use the output of reduce for furture computation, so i do not need to want to wirte the output into disk, but wanna to get the collection or list of the output in RAM. if it directly wirtes into disk, I have to read it back into RAM again. you have mentioned a special file format, will you please show me what is it? and give some example if possible.
thank you so much. Rasit OZDAS wrote: > > Hi, hadoop is normally designed to write to disk. There are a special file > format, which writes output to RAM instead of disk. > But I don't have an idea if it's what you're looking for. > If what you said exists, there should be a mechanism which sends output as > objects rather than file content across computers, as far as I know there > is > no such feature yet. > > Good luck. > > 2009/4/2 andy2005cst <[email protected]> > >> >> I need to use the output of the reduce, but I don't know how to do. >> use the wordcount program as an example if i want to collect the >> wordcount >> into a hashtable for further use, how can i do? >> the example just show how to let the result onto disk. >> myemail is : [email protected] >> looking forward your help. thanks a lot. >> -- >> View this message in context: >> http://www.nabble.com/HELP%3A-I-wanna-store-the-output-value-into-a-list-not-write-to-the-disk-tp22844277p22844277.html >> Sent from the Hadoop core-user mailing list archive at Nabble.com. >> >> > > > -- > M. Raşit ÖZDAŞ > > -- View this message in context: http://www.nabble.com/HELP%3A-I-wanna-store-the-output-value-into-a-list-not-write-to-the-disk-tp22844277p22848070.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
