= 2010-02-22 =

 * [http://www.cs.pu.edu.tw/~kuancli/ 靜宜資工系　系主任　李冠憬教授]

 * [[Image(pixel_vs_dpi.jpg)]]

== Hadoop : HDFS ==

 * [http://www.hadoop.tw/rafan/2008/09/ 幫 Hadoop HDFS 調整系統資源限制]
{{{
#!diff
--- /etc/security/limits.conf   2010-02-22 11:29:11.000000000 +0800
+++ /etc/security/limits.conf.new       2010-02-22 11:28:33.000000000 +0800
@@ -49,4 +49,6 @@
 #ftp             -       chroot          /ftp
 #@student        -       maxlogins       4

+*      soft        nofile        8192
+
 # End of file
}}}

== Hadoop : Security ==

 * 最近在研究 hadoop4win 跟 windows 版 Eclipse 怎麼連結 hadoop platform 時注意到目前 HDFS 的安全性其實並不如預期的佳，僅依靠著登入帳號在判斷是否有權限。大概想過幾種可以取得他人資料的方法，這或許是雲端安全(Cloud Security)的一個議題。
  * [http://issues.apache.org/jira/browse/HADOOP-1701 HADOOP-1701], [http://issues.apache.org/jira/browse/HADOOP-1741 HADOOP-1741]
  * http://old.nabble.com/HDFS-Login-Security-to20329559.html#a20329559 - 看起來未來應該是會加入 Kerberos 的支援...

== Cloud Security 雲端資安 ==

 * [http://www.edlconsulting.com/newsdetail.php?id=578&headline=Cloud_computing_security_set_to_improve_over_next_five_years Cloud computing security set to improve over next five years]
 * [http://www.globalsecuritychallenge.com/gsc_competitions.php#cloud Cloud Security Challenge]