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    • 1. 实用新型
    • 濁水過濾器 A CRUD WATER FILTER
    • 浊水过滤器 A CRUD WATER FILTER
    • TWM297266U
    • 2006-09-11
    • TW094219675
    • 2005-11-11
    • 吳俊概 WU, CHUN KAI孫權 SHUN, CHAN
    • 吳俊概 WU, CHUN KAI孫權 SHUN, CHAN
    • B01D
    • 本創作係一種能濾除水中雜質之濁水過濾器,係由一桶體、一開口蓋板、一排氣閥、一進水導管、一中隔板及一底部管路所組成,該桶體係為一外呈倒圓錐形之中空桶體,桶體下端為一基座;該開口蓋板係螺固於桶體上端,其下端有一圓形凹槽;該排氣閥係固設於開口蓋板上,啟閉藉由一容置於圓形凹槽之浮板所控制;該進水導管係沿桶體內壁鋪設而成,其上端設置一分流減速蓋板;該中隔板係固設於桶體內部之濾沙下方,其中貫穿有數個孔洞,其上設有阻沙網;該底部管路係固設於桶體之基座,其中共設有三個可控制水流進出之閥門開關,透過水流方向之控制,藉此組成一具有較佳過濾能力之濁水過濾器。
    • 本创作系一种能滤除水中杂质之浊水过滤器,系由一桶体、一开口盖板、一排气阀、一进水导管、一中隔板及一底部管路所组成,该桶体系为一外呈倒圆锥形之中空桶体,桶体下端为一基座;该开口盖板系螺固于桶体上端,其下端有一圆形凹槽;该排气阀系固设于开口盖板上,启闭借由一容置于圆形凹槽之浮板所控制;该进水导管系沿桶体内壁铺设而成,其上端设置一分流减速盖板;该中隔板系固设于桶体内部之滤沙下方,其中贯穿有数个孔洞,其上设有阻沙网;该底部管路系固设于桶体之基座,其中共设有三个可控制水流进出之阀门开关,透过水流方向之控制,借此组成一具有较佳过滤能力之浊水过滤器。
    • 5. 发明授权
    • Distributed database recovery
    • 分布式数据库恢复
    • US08429134B2
    • 2013-04-23
    • US12555500
    • 2009-09-08
    • Wilson Wai Shun Chan
    • Wilson Wai Shun Chan
    • G06F7/00G06F17/00
    • G06F11/1469G06F11/1471G06F2201/84
    • A method and apparatus for recovery a cluster database is provided. Database recovery is divided among a plurality of surviving database server instances in the cluster. A surviving instance is responsible for recovering data blocks to which the surviving instance is assigned. One form of block-to-instance assignment may be based on mastership of the blocks. If a data block is locked by a surviving instance at the time of failure, then no recovery of that data block may be necessary. Else, if a copy of a data block that is to be recovered is stored on a surviving node in the cluster, then one or more redo records are applied to that copy (if necessary). A redo record that corresponds to that data block might not need to be applied to the copy if the redo record reflects changes (to the data block) that are already reflected in the copy.
    • 提供了一种用于恢复集群数据库的方法和装置。 数据库恢复在集群中的多个幸存的数据库服务器实例之间分配。 幸存的实例负责恢复已分配实例的数据块。 块对实例分配的一种形式可能是基于块的掌握。 如果数据块在故障时由幸存的实例锁定,则不需要恢复该数据块。 否则,如果要恢复的数据块的副本存储在群集中的幸存节点上,则一个或多个重做记录将应用于该副本(如有必要)。 如果重做记录反映了已经反映在副本中的更改(对数据块),那么对应于该数据块的重做记录可能不需要应用于副本。
    • 10. 发明授权
    • Techniques for DLM optimization with re-mastering events
    • 用于重新掌握事件的DLM优化技术
    • US06529906B1
    • 2003-03-04
    • US09493659
    • 2000-01-28
    • Wilson Wai Shun Chan
    • Wilson Wai Shun Chan
    • G06F700
    • G06F9/52Y10S707/99931Y10S707/99932Y10S707/99933Y10S707/99936Y10S707/99938Y10S707/99943Y10S707/99953
    • Techniques for optimizing a distributed lock manager (DLM) for faster reconfiguration includes distributing over a cluster of one or more active nodes, management of locks on shared resources. A system hash map is initialized to establish a mapping between a plurality of hash value ranges and one or more master nodes. The management of the locks is initially distributed based on that mapping. The cluster is monitored to gather data during a time interval, including data that identifies how much resource usage is made of resources hashed to each hash value range of the plurality of hash value ranges. It is determined whether a re-mastering event condition is satisfied based on one or more factors. The factors include the resource usage. If the re-mastering event condition is satisfied, a re-mastering event is performed. A re-mastering event includes re-mapping the system hash map by replacing data that maps a replacement range set to an old set of corresponding master nodes with data that maps that replacement range set to a new set of corresponding master nodes. The replacement range set includes one or more hash value ranges of the plurality of hash value ranges. Lock information is transferred from the old set of one or more master nodes to the new set of one or more master nodes.
    • 用于优化分布式锁管理器(DLM)以用于更快重新配置的技术包括在一个或多个活动节点的集群上分发,在共享资源上管理锁。 系统哈希映射被初始化以建立多个散列值范围与一个或多个主节点之间的映射。 最初基于该映射分配了锁的管理。 监视集群以在时间间隔期间收集数据,包括标识对多个散列值范围的每个散列值范围进行散列的资源的资源使用量的数据。 基于一个或多个因素确定是否满足重新掌握事件条件。 因素包括资源使用。 如果满足重新掌握事件条件,则执行重新掌握事件。 重新掌握事件包括通过将将替换范围集合映射到相应主节点的旧集合的数据与将该替换范围集合映射到新的相应主节点组的数据来重新映射系统散列映射。 替换范围集合包括多个散列值范围的一个或多个散列值范围。 锁定信息从一个或多个主节点的旧集合传送到一组或多个主节点的新集合。