如果要管理多个大型快照，最好监控快照的使用情况，以确定它们是否在增长，以及它们是否需要更多磁盘空间。
If you have several large snapshots to manage, then it is a good idea to monitor the usage of your snapshots to determine if they are growing and if they require more disk space.
OAT提供DBA所需的大量信息，比如磁盘空间使用情况、日志文件、消耗IO时间最多的sql语句、最慢的sql语句等等。
The OAT provides the much needed information required by the DBA like the disk space usage, log files, SQL statements occupying the most IO time, the slowest SQL statements, and so on.
在某些数据节点已满或者新的空节点加入集群时，实现一个模块来平衡Hadoop分布式文件系统集群上的磁盘空间使用情况。
A module was implemented to balance the disk space usage on a Hadoop Distributed File System cluster when some data nodes became full or when new empty nodes joined the cluster.
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