I was thinking because it would be easier to search a single-index. Unless I don't have to worry and hadoop searches all my indexes at the same time. Is this the case?
-Xavier -----Original Message----- From: Doug Cutting [mailto:[EMAIL PROTECTED] Sent: Monday, March 10, 2008 3:45 PM To: [email protected] Subject: Re: What's the best way to get to a single key? Xavier Stevens wrote: > Thanks for everything so far. It has been really helpful. I have one > more question. Is there a way to merge MapFile index/data files? No. To append text files you can use 'bin/hadoop fs -getmerge'. To merge sorted SequenceFiles (like MapFile/index files) you can use: http://hadoop.apache.org/core/docs/current/api/org/apache/hadoop/io/Sequ enceFile.Sorter.html#merge(org.apache.hadoop.fs.Path[],%20org.apache.had oop.fs.Path,%20boolean) But this doesn't generate a MapFile. Why is a single file preferable? Doug
