=head1 NAME loadbars - A small and humble tool to observe server loads =head1 SYNOPSIS loadbars [LIST OF HOSTNAMES] [OPTIONS] =head2 Tested platforms This version of loadbars has only been tested on Debian GNU/Linux Wheezy. =head2 I like flying elephants For any startup params help check out --help on command line or 'h' during program execution. =head2 A few examples however loadbars --extended 1 --showcores 1 --height 300 --hosts localhost loadbars --hosts localhost,server1.example.com,server2.example.com loadbars --cluster foocluster (foocluster is in /etc/clusters [ClusterSSH]) =head2 More examples, using shell expansion loadbars servername{01,02,03}.example.com loadbars servername{01..50}.example.com --showcores 1 =head1 DESCRIPTION Loadbars is a small script that can be used to observe CPU loads of several remote servers at once in real time. It connects with SSH (using SSH public/private key auth) to several servers at once and vizualizes all server CPUs and memory statistics right next each other (either summarized or each core separately). Loadbars is not a tool for collecting CPU loads and drawing graphs for later analysis. However, since such tools require a significant amount of time before producing results, Loadbars lets you observe the current state immediately. Loadbars does not remember or record any load information. It just shows the current CPU usages like top or vmstat does. =head1 INFO =head2 CPU stuff st = Steal in % [see man proc] (extended), Color: Red gt = Guest in % [see man proc] (extended), Color: Red sr = Soft IRQ usage in % (extended), Color: White ir = IRQ usage in % (extended), Color: White io = IOwait cpu sage in %, Color: Purple id = Idle cpu usage in % (extended), Color: Black ni = Nice cpu usage in %, Color: Green us = User cpu usage in %, Color: Yellow, dark yellow if to>50%, orange if to>50% sy = System cpu sage in %, Color: Blue, lighter blue if >30% to = Total CPU usage, which is (100% - id) pk = Max us+sy peak of last avg. samples (extended) 1px horizontal line: Maximum sy+us+io of last 'avg' samples (extended) =head2 Memory stuff Ram: System ram usage in %, Color: Dark grey Swp: System swap usage in %, Color: Grey =head2 Network stuff Rxb: Incoming (received) traffic in %, Color: Light green, normal green if >100% while using low netlink reference. Bar comes from top and is half width. Txb: Outgoing (transmitted) traffic in %, Color: Light green, normal green if >100% while using low netlink reference. Bar comes from bottom and is half width. When network bar is red: The interface does not exist on the specific remote host. =head3 Config file support Loadbars tries to read ~/.loadbarsrc and it's possible to configure any option you find in --help but without leading '--'. For comments just use the '#' sign. Sample config: =over 4 showcores=1 # Always show cores on startup =back will always show all CPU cores. If you press the 'w' hotkey during program execution your config file will be overwritten using the current settings. =head1 LICENSE See package description or project website. =head1 AUTHOR Paul Buetow - =cut