...软件虚拟带库方案中的磁盘缓存,控制与读写基于备份服务器的操作系统,无法彻底避免文件系统的带宽损益(File System Overhead),典型体现为: - 对于设计资料这样的中、小文件时,备份速度只及同级Mirage™的一半或更低 - 恢复数据时,机械磁带库需经历抓带...
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Both overall file system overhead and efficiency issues relating to individual file storage can play a role here.
要兼顾总体文件系统开销和与各个文件相关的存储效率问题。
In general, cooked files are slower because of the additional overhead and buffering provided by the file system.
通常,熟文件更慢,因为存在附加的开销和文件系统提供的缓冲。
Without file system caching, this overhead is mitigated by the fact that XML columns are buffered in the DB2 buffer pool and CLOB columns are not.
在没有文件系统缓存的情况下,xml列在db2缓冲池进行缓冲而clob列则不是,从而可降低开销。
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