Well, as far as I understand the Properties object is packed into xml file before to be sent to the Mapper, so it can contain only strings. That's reasonable. But I need an array (or collection) of floats to be passed to each Mapper. Of course I can save it to DFS, so that Mapper could read it. But won't it slow down work of the Hadoop if every Mapper reads the same file from DFS? Maybe it's possible to attach this array to the job jar in any way?
-----Original Message----- From: Andrzej Bialecki [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 30, 2007 8:54 PM To: [email protected] Subject: Re: What objects can be passed to Mapper and Reducer classes using Configuration? >Ilya Vishnevsky wrote: >> There is method Configuration.setObject(String name, Object value). I >> tried values of different classes and found that only Strings are passed >> normally. Other objects turn out to be null when Mapper or Reducer tries >> to get them using getConf().getObject(String name). >> Is there possibility to pass a Set for example? >The short answer is that this method is deprecated and will be removed. >Don't use it. >Longer answer - see http://issues.apache.org/jira/browse/HADOOP-1343 >-- >Best regards, >Andrzej Bialecki <>< > ___. ___ ___ ___ _ _ __________________________________ >[__ || __|__/|__||\/| Information Retrieval, Semantic Web >___|||__|| \| || | Embedded Unix, System Integration >http://www.sigram.com Contact: info at sigram dot com
