On 9/3/10 5:31 AM, Joe Kumar wrote:
Hi all,
Since ClusterDumper doesnt seem to have elaborate documentation, just
created a page
https://cwiki.apache.org/confluence/display/MAHOUT/Cluster+Dumper
While playing around with clusterdump utility, I learned that it can be run
on hadoop or as a standalone java program.
As most of you are aware, when executed on hadoop, the seqFileDir and
pointsDir should be the HDFS location else the local system path location.
Since some of the clustering related wiki pages specified that we can get
the output from HDFS and then run clusterdump, I was assuming that the
clusterdump would always read data from local FS.
I am not sure if newbies would have this same thought process.. So I was
thinking if we'd need to make this explicit by changing the help list of
clusterdump
Currently ClusterDumper.java has
addOption(SEQ_FILE_DIR_OPTION, "s", "The directory containing Sequence
Files for the Clusters", true);
Should we specify something like
addOption(SEQ_FILE_DIR_OPTION, "s", "The directory (HDFS if using Hadoop /
Local filesystem if on standalone mode) containing Sequence Files for the
Clusters", true);
and so on..
The problem with this approach is itz repetitive in that we'd need to change
in quite a few places.. (I believe vectordump also follows the same
principle)
or
+1 to generic message approach
should we modify CommandLineUtil to have a generic message in the help
specifying the fact that while running hadoop, the directories should
reference HDFS location else local FS.
How about adding it to the footer like
formatter.setFooter("Specify HDFS directories while running hadoop; else
specify local File System directories");
formatter.printFooter();
Appreciate your feedbacks / thots.
thanks
Joe.
