As far as my basic understanding goes: 1 - 3rd party - or so technologies are located in the folder hadoop-xx/lib , for example apache's commons-logging technologie ... 4 - ... which is used by hadoop for logging into the log files specified in the configuration files. log files are usually in the hadoop-xx/logs/ directory and there are two types of logging: INFO (information messages) and ERROR. you can tune logging schemes via hadoop-xx/conf/commons- logging.properties or hadoop-xx/conf/log4j.properties
On 12/12/2007, 王学超 <[EMAIL PROTECTED]> wrote: > > hi, everyone! > I'm new,I am not familiar with hadoop，so I have some following > questions,please help me. thanks > 1、Are there 3rd party technologies and included in hadoop or dependencies? > 2、How is hadoop's high-availability handled? Built-in or requires > separate HA manager? > 3、How is security handled? > 4、How is error logging handled? > -- --------------------------------------------------------- شهر مبارك كريم كل عام و أنتم بخير --------------------------------------------------------- Honsali Khalil − 本査理 カリル Academic>Japan>NIT>Grad. Sc. Eng.>Dept. CS>Matsuo&Tsumura Lab. http://www.matlab.nitech.ac.jp/~k-hon/<http://www.matlab.nitech.ac.jp/%7Ek-hon/> +81 (zero-)eight-zero 5134 8119 [EMAIL PROTECTED] (instant reply mail)
