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ROMAAdvent Calendar 2015

Day 2

single serverでのインストール方法(rubygems)

Last updated at Posted at 2015-12-02

とりあえずまずは使ってみたいという方用の、single serverにinstallする手順です。
(実際の本番環境では複数台でクラスターを組むことを推奨します)

条件

server: 1台
storage type : memory
ruby version : v2.1
ROMA version : v1.2.0
Installation type : rubygems

手順

1. install ROMA

gem install roma

2. make instance(Cluster)

mkroute localhost_10001 localhost_10002 --replication_in_host
ls -l
  -rw-r--r-- 1 root root 35693 Dec  2 05:35 localhost_10001.route
  -rw-r--r-- 1 root root 35693 Dec  2 05:35 localhost_10002.route
  • mkrouteコマンドはROMAのクラスター構成ファイル(routing file)を作成します。
  • --replication_in_hostオプションは同一サーバ内でのデータ複製を許可するオプションです。通常はdebug用にsingle serverで構成するときのみ使用します。

3. booting ROMA

romad localhost -p 10001 -d --replication_in_host
romad localhost -p 10002 -d --replication_in_host
  • romadコマンドのusage
    romad <address> [options]
  • -pオプションはROMAのport No.を指定します
  • -dオプションはROMAをdaemonモードで起動します
    他のオプションに関してはROMA Commands をご参照ください

挙動確認

telnet localhost 10001
> version
  VERSION ROMA-1.2.0

> stat node
  stats.run_receive_a_vnode {}
  routing.nodes.length 2
  routing.nodes ["localhost_10001", "localhost_10002"]
  routing.vnodes.length 512
  routing.short_vnodes 0
  routing.lost_vnodes 0
  routing.version_of_nodes {"localhost_10001"=>66048, "localhost_10002"=>66048}
  END

> set foo 0 0 3
  bar
  STORED

> get foo
  VALUE foo 0 3
  bar
  END

> balse
  Are you sure?(yes/no)
> yes
  {"localhost_10002"=>"BYE", "localhost_10001"=>"BYE"}
  Connection closed by foreign host.

  • stat node コマンドはROMAの基本的なstatus情報を表示します
  • setコマンドのusage
set <key> 0 <expt> <value length>\r\n
<value>\r\n
  • balse コマンドはROMA Clusterを終了させるコマンドです
    (shutdownコマンドも同様の動きをします)

参照URL

ROMA Getting Started : http://roma-kvs.org/getting_started.html
ROMA commands page : http://roma-kvs.org/commands.html
ROMA FAQ page : http://roma-kvs.org/learn/faq.html

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