Hi Ben,
I just verified it on trunk,
-D option support already there in Hadoop.
/**
* Print the usage message for generic command-line options supported.
*
* @param out stream to print the usage message to.
*/
public static void printGenericCommandUsage(PrintStream out) {
out.println("Generic options supported are");
out.println("-conf <configuration file> specify an application
configuration file");
out.println("-D <property=value> use value for given property");
out.println("-fs <local|namenode:port> specify a namenode");
out.println("-jt <local|jobtracker:port> specify a job tracker");
out.println("-files <comma separated list of files> " +
"specify comma separated files to be copied to the map reduce cluster");
out.println("-libjars <comma separated list of jars> " +
"specify comma separated jar files to include in the classpath.");
out.println("-archives <comma separated list of archives> " +
"specify comma separated archives to be unarchived" +
" on the compute machines.\n");
out.println("The general command line syntax is");
out.println("bin/hadoop command [genericOptions] [commandOptions]\n");
}
Which version of hadoop you are running?
As part of below JIRA , i will post the tests. You can have a look.
Regards,
Uma
> On Sun, Aug 28, 2011 at 4:53 AM, Aaron T. Myers <[email protected]>
> wrote:
> > Hey Ben,
> >
> > I just filed this JIRA to add this feature:
> > https://issues.apache.org/jira/browse/HDFS-2293
> >
> > If anyone would like to implement this, I would be happy to
> review it.
> >
> > Thanks a lot,
> > Aaron
> >
> > --
> > Aaron T. Myers
> > Software Engineer, Cloudera
> >
> >
> >
> > On Sat, Aug 27, 2011 at 4:08 PM, Ben Clay <[email protected]> wrote:
> >
> >> I didn't even think of overriding the config dir. Thanks for
> the tip!
> >>
> >> -Ben
> >>
> >>
> >> -----Original Message-----
> >> From: Allen Wittenauer [mailto:[email protected]]
> >> Sent: Saturday, August 27, 2011 6:42 PM
> >> To: [email protected]
> >> Cc: [email protected]
> >> Subject: Re: set reduced block size for a specific file
> >>
> >>
> >> On Aug 27, 2011, at 12:42 PM, Ted Dunning wrote:
> >>
> >> > There is no way to do this for standard Apache Hadoop.
> >>
> >> Sure there is.
> >>
> >> You can build a custom conf dir and point it to that.
> You *always*
> >> have that option for client settable options as a work around
> for lack of
> >> features/bugs.
> >>
> >> 1. Copy $HADOOP_CONF_DIR or $HADOOP_HOME/conf to a dir
> >> 2. modify the hdfs-site.xml to have your new block size
> >> 3. Run the following:
> >>
> >> HADOOP_CONF_DIR=mycustomconf hadoop dfs -put file dir
> >>
> >> Convenient? No. Doable? Definitely.
> >>
> >>
> >>
> >>
> >
>
