= 2009-08-20 =

 * E2GC2 Paper 排版
 * hadoop.nchc.org.tw 系統調校
  * 2009-08-19 waue & wade 已經新增硬碟
   * waue 修改 drbl-hadoop-mount-disk
   * 把 /dev/sda1 掛到 /var/lib/hadoop/
   * 把 /dev/sdb1 掛到 /var/lib/hadoop/cache/hadoop/mapred
  * 使用 dphys-swapfile 來附掛 swap
   * 設定預設 SWAP 掛載路徑
{{{
#!sh
# /etc/dphys-swapfile - user settings for dphys-swapfile package
# author Neil Franklin, last modification 2006.09.15
# copyright ETH Zuerich Physics Departement
#   use under either modified/non-advertising BSD or GPL license
# this file is sourced with . so full normal sh syntax applies

# where we want the swapfile to be, this is the default
CONF_SWAPFILE=/var/lib/hadoop/swap

# size we want to force it to be, default (empty) gives 2*RAM
# CONF_SWAPSIZE=2048

##
#  Give yourself three times the memory size of swap?
#
# mem=$(grep MemTotal /proc/meminfo |awk '{print $2}')
# CONF_SWAPSIZE=$(expr $mem \* 3)
#
}}}
   * 將 dphys-swapfile 加入預設起始程序。
   * [注意] 由於 drbl-hadoop-mount-disk 必須在 dphys-swapfile 之前執行，預設 update-rc.d script defaults 都會加到 S20，會造成 dphy-swapfile 比 drbl-hadoop-mount-disk 早執行，將造成開機後找不到 swapfile 的問題。
{{{
~$ sudo dsh -a update-rc.d dphys-swapfile defaults 90
}}}
  * 關閉只有 2GB 的計算節點