In microsoft sql server 2005 , a database engine administrator plans and runs the daily operations of instances of the database engine in such areas as system availability , performance monitoring and optimization , deployment , upgrades , troubleshooting , and configuration 在microsoft sql server 2005中,数据库引擎管理员在系统可用性、性能监视和优化、部署、升级、故障排除和配置等方面对数据库引擎实例的日常操作进行计划和运行。
So , more and more distributed applications adopt redundant servers : on one hand , the system availability could be improved through adding the redundancy of data and computation ; on the other hand , user requests are processed on several servers in parallel , so the system performance could be advanced by this means 为此,许多分布式应用采用了冗余服务技术:一方面,通过增加数据和计算的冗余度,提高了系统的可用性;另一方面,多个服务器并行地响应用户请求,提高了系统的性能。
( 2 ) it adopts rodo model based on performance index to calculate the redundancy of instances , and this means can make tradeoff between user ' s performance and availability demands effectively . ( 3 ) form the viewpoint of system performance and availability , acms adopts mobile - agent technology to adjust system configuration in running time , improves system ' s dynamic scalability and resource utilization ratio on condition of guaranteeing the system availability 从用户角度出发,采用基于性能索引的rodo模型确定服务实例的冗余度,有效地权衡了客户对系统性能和可用性的需求;结合可用性和性能两项指标,采用基于移动代理的配置管理策略对系统进行动态配置,在保证可用性的前提下,改善了系统性能,提高了资源利用率。
Sludge disposal system availability range from c13 superscript bin discharging sludge dewatering mouth , until dry sludge provide material , burning , smoke and ash emissions purification of the entire output of mechanical equipment , process pipelines , electrical equipment , instrument control system and civil engineering , including the whole project within the scope of the design , construction , manufacture , installation , and trial run and test run after the normal operation of the after - sales service 污泥处置系统供货范围从c13标脱水污泥料仓出料口开始,直到干化污泥出料、焚烧、烟气净化排放和灰渣输出为止的整套机械设备、工艺管道、电气设备、仪控系统和土建工程,包括整个工程范围内的设计、施工、制造、安装调试、试运行及正常运行后的售后服务。