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hclose(1)                      HADOOP                       hclose(1)

NAME
        hclose - close a TaskTracker for some reason. 
 
SYNOPSIS
        hclose [-h] [-jt jt1;jt2..] HOSTNAME 

DESCRIPTION
        Close the TaskTracker specified by HOSTNAME. After closed, it will
        not accept new MAP/REDUCE tasks. But tasks currently running will
        continue until finished. It is useful to maintenance the host. 

        -h
                Display usage information

        -jt jobtracker url link
                Specify the cluster by the jobtracker url link, for example. 
                        -jt hostA:3479;hostB:3479
EXAMPLE
        % hhosts
        HOST    STATUS  MAX     MAP     REDUCE  FAILURE TMP_SPACE
        c0101   ok      8       0       0       0       203M
        c0102   ok      8       0       0       0       553M

        % hclose c0102
        Host <c0102> will be closed, please confirm by hhosts/hload

        % hhosts                                                        
        HOST    STATUS  MAX     MAP     REDUCE  FAILURE TMP_SPACE
        c0101   ok      8       0       0       0       203M
        c0102   closed  8       0       0       0       553M
AUTHOR
        Written by Shuguang Liu

REPORT BUGS
        Report bugs to <honkliu@hotmail.com>

COPYRIGHT
        Copyright (C) 2005-2010 Shuguang Liu's Inc.

        This file is not a free software, all the source codes are protected
        and will not be released to any body or organization without 
        authority. 

SEE ALSO
        hopen(1), hslot(1), hhosts(1), hload(1)
hclose (hadoop utils) 13.0              September 2007 

hclose (last edited 2009-09-20 23:54:27 by localhost)