#FORMAT plain hload(1) HADOOP hload(1)
NAME
hload - Display load information about cluster hosts in 5 seconds
interval.
SYNOPSIS
hload [OPTION]...
DESCRIPTION
By default, hload displays load information about all hosts in the
specified cluster. This command will display the host status, cpu
usage, tmp space, idle time and so on.
-h
Disoplay usage information.
-jt jobtracker url
specify the cluster cluster by the jobtracker's url link, for
example: -jt hostA:3479;hostB:3479
OUTPUT
By default, hload display the following fields:
HOST
The name of the host. If a host is currently a host of a cluster
specifed by the command, the host name will be displayed here.
status
The current status of the host (In fact, the status of TaskTracker
daemon). The possilbe values for host status are as the follows.
ok
The host is available to accept new tasks.
closed
The host is not allowed to accept new tasks any more, but tasks
currently running on the host will continue until finished.
r1m
The 1-minute exponentially averaged CPU run queue length
r5m
The 5-minute exponentially averaged CPU run queue length
r15m
The 15-minute exponentially averaged CPU run queue length
ut%
The CPU utilization exponentially averaged over the last 5 seconds.
between 0.00 and 100.00
pg
The memory paging rate exponentially averaged over the last minute, in
pages per second.
it
On UNIX, the idle time of the host (keyboard not touched on all logged
in sessions), in minutes.
tmp
The amount of free space in /tmp, in megabytes.
swp
The amount of available SWAP, in megabytes.
mem
The amount of available RAM, in megabytes. EXAMPLE
% hload
HOST status r1m r5m r15m ut% pg it tmp swp mem
c0101 ok 6.33 3.09 1.16 89.17 207.7 0 202M 509M 216M
c0102 ok 4.74 1.54 0.54 7.65 6.86 0 553M 509M 74M
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
hhosts(1), hopen(1), hclose(1), hslot(1)
hload (hadoop utils) 13.0 September 2007