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 Memcache服务组驱动

memcache 服务组驱动使用了memcache ,一个分布式的内存对象缓存系统,用于提升站点到性能。更多细节,请参阅memcached.org

要使用memcache驱动,必须安装memcache。或许已经像OpenStack对象存储和OpenStack面板那样早已经安装过了。如果需要安装memcache,请参阅OpenStack 安装指南都详细说明。

这些文件 /etc/nova/nova.conf所需要的值须在每台memcache驱动的节点上配置:

# Driver for the ServiceGroup service
servicegroup_driver="mc"

# Memcached servers. Use either a list of memcached servers to use for caching (list value),
# or "<None>" for in-process caching (default).
memcached_servers=<None>

# Timeout; maximum time since last check-in for up service (integer value).
# Helps to define whether a node is dead
service_down_time=60
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