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Posted to common-user@hadoop.apache.org by "Daniel,Wu" <ha...@163.com> on 2011/08/03 05:05:03 UTC
(keytype,valuetype) of map output should match (keytype,valuetype)
of reducer input?
should they matched exactly?
Re: (keytype,valuetype) of map output should match
(keytype,valuetype) of reducer input?
Posted by Harsh J <ha...@cloudera.com>.
Yes, in terms of 'Java types', they _must_ match. That doesn't mean
you can't set them all to just 'Writable' and have fun, I think ;)
2011/8/3 Daniel,Wu <ha...@163.com>:
> should they matched exactly?
>
--
Harsh J