《HACMP5.x 技术交流》.ppt

HACMP5.X Planning and Implementation HACMP 5.X 新特性与日常维护 He Bing　 hebing@ 目录 HACMP概念回顾 HACMP 5.x 新功能介绍 常见HA架构 日常管理 目录 HACMP概念回顾 HACMP 5.x 新功能介绍 常见HA架构 日常管理 Although Hardware is Now Very Reliable, Hardware Failures Account for a Small Minority of System Outages Several studies place the proportion between 20% and 45% Human error, software error and planned maintenance cause the majority of service outages HACMP—(High Availability Cluster Multi Processing) 高可用 & 容错 Software Layers on a HACMP node 什么环境不适合HACMP You cannot suffer any downtime Failovers will cause at least some downtime Your environment is not stable HACMP depends on stable software levels and stable configuration HACMP is susceptible to the “fiddle factor” Your application needs manual intervention to recover from a failure Manual reset of a device, etc. 使用HACMP的考虑点 Application must be able to recover from a stop/restart operation Must release all resources when stopped—either normally or abnormally Must tolerate a loss of memory contents Must tolerate a loss of processor state Must perform a restart from a checkpoint Must recover from partial data writes Must operate in a “transactional” protocol There must not be a single point of failure in the HA cluster Shared power supply, non-protected disk, etc. HACMP is a software solution 目录 HACMP概念回顾 HACMP 5.x 新功能介绍 常见HA架构 日常管理 HACMP V5.1新特性1/3 1.HACMP “classic” (HAS) has been dropped; only HACMP/ES was available based on IBM Reliable Scalable Cluster Technology 2.SMIT “Standard” and “Extended” configuration paths (procedures) 3.Automated configuration discovery 4.Custom resource groups HACMP V5.1新特性2/3 5.Non IP networks based on heartbeating over disks 6.Fast disk takeover 7.Forced varyon of volume groups 8.Heartbeating over IP aliases 9.Improved security, by using cluster communication daemon (eliminating the need of using AIX “r” commands, thus eliminating the need for the /.rhosts file) 10.Improved performance for cluster config