Heartbeat

http://hanaduri.egloos.com/1435925

http://adminplay.com/3446

http://readysystem.co.kr/ready/bbs/board.php?bo_table=tech_linux&wr_id=70&page=3

http://blog.naver.com/PostView.nhn?blogId=nkyle9361&logNo=110087700887&redirect=Dlog&widgetTypeCall=true

http://coffeenix.net/doc/heartbeat/2.html

http://blog.pages.kr/91

http://blog.syszone.co.kr/2235

http://www.mediakorea.net/sirboard/board_view.php?sm_id=jsp&sb_id=300&search_category=&search_select=&search_text=&search_op=&page=14&next_num=

http://www.ibm.com/developerworks/kr/library/l-linux-ha/

http://maya070.tistory.com/tag/Heartbeat

http://blog.zosel.net/15

http://community.365managed.com/?document_srl=940&mid=server&sort_index=regdate&order_type=desc

http://blog.errorstory.net/tag/Heartbeat

http://kltp.kldp.net/stories.php?story=03/01/07/7241711

http://www.inet.co.kr/faq/stories.php?story=03/10/17/7500350