NAME

derived - run command periodically and calculate rate and check from network

SYNOPSIS

  $ cat CmdsFile
  slowqueries: mysql -NB -e 'show global status like "Slow_queries%"'
  $ derived --port 12306 CmdsFile

  $ telnet localhost 12306
  get slowqueris
  VALUE slowqueris 0 3
  0.2  # slow queries/sec

DESCRIPTION

derived runs command periodically and capture integer value. And calculate per-second rate. You can retrieve these values from integrated memcached-protocol server

You can monitoring the variation of metrics through this daemon.

ARGUMENT

-h, --help

Display help message

-i

Interval seconds for running commands. Default 10.

--port: Required

Port number to bind

--host

IP address to bind

COMMAND FILE

A command file should contain both a name for the process and the command used to run it.

  slowquery: mysql -NB -e 'show global status like "Slow_queries%"'
  lines: wc -l /path/to/file

SERVER

You can access to data via integrated memcached-protocol server.

  use Cache::Memcached::Fast;

  my $memcached = Cache::Memcached::Fast->new({
    servers => [qw/localhost:12306/],
  });

  say $memcached->get('slowqueris'); # only per seconds value.
  say $memcached->get('slowqueris:latest'); # only latest value.
  say $memcached->get('slowqueris:full'); #JSON formated data include raw values

NOTICE

IF there is no previous data to calculate rate, the server returns "0E0"

AUTHOR

Masahiro Nagano <kazeburo@gmail.com>

LICENSE

Copyright (C) Masahiro Nagano

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.