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1. 发明授权

US06732124B1 Data processing system with mechanism for restoring file systems based on transaction logs 失效
标题翻译：具有基于事务日志恢复文件系统的机制的数据处理系统
公开(公告)号：US06732124B1
公开(公告)日：2004-05-04
申请号：US09501568
申请日：2000-02-09
申请人： Michihiko Koseki , Mamoru Yokoyama , Masashi Sumi , Satoru Yamaguchi , Sadayoshi Taniwaki , Seishiro Hamanaka
发明人： Michihiko Koseki , Mamoru Yokoyama , Masashi Sumi , Satoru Yamaguchi , Sadayoshi Taniwaki , Seishiro Hamanaka
IPC分类号： G06F1730
CPC分类号： G06F11/1435 , G06F11/1471 , G06F12/0804 , G06F12/0868 , G06F2212/466 , Y10S707/99943 , Y10S707/99953
摘要： A data processing system having an efficient logging mechanism which stores log records for repairing a file system when its consistency is lost. When there is a transaction attempting to update metadata stored in metadata volumes, a metadata loading unit reads the requested metadata objects out of the volumes and loads them to a metadata cache. At that time, a metadata manager updates its internal database to record from which metadata volume each metadata object has been fetched. Each time the transaction updates a metadata object in the cache, a log collection unit collects a copy of the updated metadata object, together with a volume ID which indicates its home metadata volume. The collected data is temporarily stored in a log buffer, and finally saved into a log volume by a log writing unit.
摘要翻译：一种具有有效的记录机制的数据处理系统，其存储用于在丢失文件系统的一致性时修复文件系统的日志记录。当存在尝试更新存储在元数据卷中的元数据的事务时，元数据加载单元从卷中读取所请求的元数据对象，并将其加载到元数据高速缓存。当时，元数据管理器更新其内部数据库，以记录从哪个元数据卷获取每个元数据对象。每次事务更新高速缓存中的元数据对象时，日志收集单元收集更新的元数据对象的副本以及指示其归属元数据卷的卷ID。收集的数据临时存储在日志缓冲区中，最后由日志写入单元保存到日志卷中。

2. 发明授权

US06804715B1 Switch control apparatus, switch control method, and a computer-readable recording medium in which is recorded a switch control program 失效
标题翻译：开关控制装置，开关控制方法以及记录有开关控制程序的计算机可读记录介质
公开(公告)号：US06804715B1
公开(公告)日：2004-10-12
申请号：US09653357
申请日：2000-08-31
申请人： Michihiko Koseki , Yoshihisa Chujo
发明人： Michihiko Koseki , Yoshihisa Chujo
IPC分类号： G06F15173
CPC分类号： H04L67/10 , H04L69/329
摘要： The communications statuses of a plurality of clients are checked in a fixed cycle; when a check result corresponding to at least one of the clients is irregular, the estimated number of clients which will be able to receive communications services from an alternative server (standby server) after the server is switched from a main server (present server) to the alternative server is calculated based on all said check results; the calculated number of clients is compared with the number of clients which are receiving the communications services from the main server prior to the switch, and the appropriateness of the switch is determined based on the result of this comparison; the switch from the main server to the alternative server is controlled based on the result of the determination.
摘要翻译：以固定的周期检查多个客户端的通信状态; 当对应于至少一个客户端的检查结果不规则时，在将服务器从主服务器（当前服务器）切换到服务器之后，将能够从备用服务器（备用服务器）接收通信服务的客户端的估计数量到基于所有所述检查结果计算替代服务器; 将计算出的客户数与在切换之前从主服务器接收通信服务的客户端的数量进行比较，并且基于该比较的结果确定交换机的适当性; 基于确定的结果来控制从主服务器到备用服务器的切换。

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