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1. 发明申请

US20050251625A1 Method and system for data processing with recovery capability 有权
标题翻译：具有恢复能力的数据处理方法和系统
公开(公告)号：US20050251625A1
公开(公告)日：2005-11-10
申请号：US10849222
申请日：2004-05-20
申请人： Noriko Nagae , Nobuo Kawamura , Takayoshi Shimokawa
发明人： Noriko Nagae , Nobuo Kawamura , Takayoshi Shimokawa
IPC分类号： G06F12/08 , G06F3/06 , G06F11/14 , G06F12/00
CPC分类号： G06F11/1471 , G06F12/0866
摘要： The data processing system controls, from the database management system on a host computer, the storage device subsystem which stores log data supplied from the database management system; allocates on a disk cache in the storage device subsystem in advance a log-dedicated buffer area of a size equal to that of the log data output between checkpoints; writes log data into the buffer area; and, in the event of a host computer failure, reads out the log data from the disk cache without making access to a disk device. Since the log information required for the recovery of the data processing device is cached on the storage device side, the time it takes to read the necessary log information can be shortened, which in turn reduces the system recovery time.
摘要翻译：数据处理系统从主计算机上的数据库管理系统控制存储从数据库管理系统提供的日志数据的存储设备子系统; 提前在存储设备子系统的磁盘缓存上分配与检查点之间输出的日志数据大小相等的日志专用缓冲区; 将日志数据写入缓冲区; 并且在主机计算机故障的情况下，从磁盘缓存读取日志数据，而不访问磁盘设备。由于恢复数据处理设备所需的日志信息被缓存在存储设备侧，因此可以缩短读取所需日志信息所需的时间，从而缩短系统恢复时间。

2. 发明授权

US07251716B2 Method and system for data processing with recovery capability 有权
标题翻译：具有恢复能力的数据处理方法和系统
公开(公告)号：US07251716B2
公开(公告)日：2007-07-31
申请号：US10849222
申请日：2004-05-20
申请人： Noriko Nagae , Nobuo Kawamura , Takayoshi Shimokawa
发明人： Noriko Nagae , Nobuo Kawamura , Takayoshi Shimokawa
IPC分类号： G06F12/00
CPC分类号： G06F11/1471 , G06F12/0866
摘要： The data processing system controls, from the database management system on a host computer, the storage device subsystem which stores log data supplied from the database management system; allocates on a disk cache in the storage device subsystem in advance a log-dedicated buffer area of a size equal to that of the log data output between checkpoints; writes log data into the buffer area; and, in the event of a host computer failure, reads out the log data from the disk cache without making access to a disk device. Since the log information required for the recovery of the data processing device is cached on the storage device side, the time it takes to read the necessary log information can be shortened, which in turn reduces the system recovery time.
摘要翻译：数据处理系统从主计算机上的数据库管理系统控制存储从数据库管理系统提供的日志数据的存储设备子系统; 提前在存储设备子系统的磁盘缓存上分配与检查点之间输出的日志数据大小相等的日志专用缓冲区; 将日志数据写入缓冲区; 并且在主机计算机故障的情况下，从磁盘缓存读取日志数据，而不访问磁盘设备。由于恢复数据处理设备所需的日志信息被缓存在存储设备侧，因此可以缩短读取所需日志信息所需的时间，从而缩短系统恢复时间。

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