问个HACMP的考题

luodonghua

an enterprise has three nodes:\r\nNode \'A\' is a production database, \r\nNode \'B\' is a production application server\r\nNode \'C\' is a test and development node. \r\n\r\nNode \'C\' is used by 6 programmers to develop and the production application as business critical and would like to make it highly avaliable with HACMP.\r\nApplication development and testing is not business critical.\r\n\r\nWhich of the following describes the best solution?\r\n\r\nA: There is not an adequate solution, because HACMP should not be configured in this envrionment without a decicated standby node.\r\n\r\nB: Node \'A\' and \'B\' should be configured in a cluster with mutual fallover of two cascading resouce groups to provide both nodes with deliver acceptable response time with both resouce groups.\r\n\r\nC: Node \'A\' and Node \'C\' should be configured in one cluster, and Nodes \'B\' and \'C\' in another cluster to prevent both database and application server from falling over to node \'C\' at the same time\r\n\r\nD: Node \'A\',\'B\',\'C\' should be configured in a cluster with Node \'C\' the host standby for both database and application server resource groups. Workload Manager (WLM) must be configured on database and application servers from over utilizting the CPU resource\r\n\r\n\r\n答案说是B，不过我觉得应该是D。\r\n\r\n高手觉得应该是那一个？\r\n\r\n强烈谢谢

huangxiang1969

D中间的描述不对，你可以把A、B、C三个节点配成一个cluster，这个没有问题，但是应该将B作为A的host standby，其次才是C

luodonghua

借问以下，不是说应该找一个最空闲的做standby吗？这样才能保证fallover以后的performance不受影响。\r\n\r\n所以应该找C做standby呀，这样的话，答案是D

orian

no, 空闲只是一个条件，而critical更为重要。测试机通常不要和任何生产的东西放在一起，除非没有机器，例如只有两个node。

luodonghua

谢谢你。\r\n\r\n看来我还需要继续学习。

jtwen

Application development and testing is not business critical.