mongoDB的介绍和相关操作(6)

mongoDB管理工具

http://www.mongodb.org/display/DOCS/Admin+UIs

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在MongoDB的sharding功能里，Shard Server，用于存储实际的数据块，实际生产环境中一个shard server角色可由几台机器组一个relica set承担，防止主机单点故障

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???????? 进行相应操作，如重新注册replSet、添加新的节点
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mongostat
使用 mongostat help可以查看参数和结果字段的意思
Fields
?? inserts????? - # of inserts per second
?? query??????? - # of queries per second
?? update?????? - # of updates per second
?? delete?????? - # of deletes per second
?? getmore????? - # of get mores (cursor batch) per second
?? command????? - # of commands per second
?? flushes????? - # of fsync flushes per second
?? mapped?????? - amount of data mmaped (total data size) megabytes
?? visze??????? - virtual size of process in megabytes
?? res????????? - resident size of process in megabytes
?? faults????? ?- # of pages faults per sec (linux only)
?? locked?????? - percent of time in global write lock
?? idx miss???? - percent of btree page misses (sampled)
?? qr|qw??????? - queue lengths for clients waiting (read|write)
?? ar|aw??????? - active clients (read|write)
?? netIn??????? - network traffic in - bits
?? netOut?????? - network traffic out - bits
?? conn???????? - number of open connections