...例故障(instance failure)或磁盘故障(disk failure)的数据库进行恢复(recovery)的第一步被称为缓存恢复(cache recovery)或前滚(rolling forward),此步骤将重做日志中的所有修改记录重新应用到数据文件上。
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This recovery is done without losing system or application data, without losing Settings and even without losing the cache.
这种恢复并不会导致系统或应用数据的丢失,也不会丢失设置,甚至连缓存都不会丢失。
The recovery algorithm of the distributed directory based on Directory Cache takes the directory caches as a hint to recover the directory approximately and quickly.
基于目录缓存的恢复算法采用目录缓存作为恢复的线索来近似地恢复目录,该算法能快速地恢复目录。
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