...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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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。
This recovery is done without losing system or application data, without losing Settings and even without losing the cache.
要把旧的连接从事务管理器的缓存中移除,这样的话,资源管理器恢复可用后的第一个事务调用就不会出错。
Stale connections should be removed from the transaction manager cache so that first invocations of transactions after the resource manager becomes available do not fail.
当履行请求所需的数据不在本地缓存中时,它将透明地恢复对服务器的调用。
It transparently reverts back to making calls to the server when the the data required to fulfill the request is not in the local buffer.
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