公开(公告)号：US20160070622A1

公开(公告)日：2016-03-10

申请号：US14930751

申请日：2015-11-03

Applicant: HITACHI DATA SYSTEMS CORPORATION

Inventor： Alan G. Bryant ,  Kevin S. Grimaldi ,  Trek Palmer ,  David B. Pinkney

IPC: G06F11/14 ,  G06F3/06

CPC classification number: G06F11/1464 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/067 ,  G06F11/1425 ,  G06F11/143 ,  G06F11/1435 ,  G06F11/1451 ,  G06F11/1662 ,  G06F11/2094 ,  G06F2201/80 ,  G06F2201/84

Abstract: An “operate with missing region” feature allows a cluster to continue servicing reads for available regions even when some regions are missing. Upon a given node failure condition, the cluster is placed in an effective read-only mode for all regions. The node failure condition typically is one where there has been a failure of an authoritative region copy and no backup copy is then available. Typically, “read-only” means no client write or update requests succeed while the cluster is in this state. Those requests should fail with an error message that indicates failure because of the read-only status. Preferably, such requests are re-tried. In this mode, regions are only allowed to perform read operations but the cluster continues to operate with missing regions, and missing regions are entered on a region map. The cluster then automatically recovers returning missing regions, after which it leaves the read-only state.

公开(公告)号：US20150012497A1

公开(公告)日：2015-01-08

申请号：US14364210

申请日：2012-03-29

Applicant: HITACHI DATA SYSTEMS CORPORATION

Inventor： Nathan W. Clark ,  Trek Palmer ,  Alan G. Bryant

IPC: G06F17/30 ,  G06F11/14

CPC classification number: G06F17/30082 ,  G06F11/1453 ,  G06F17/30073 ,  G06F17/30584

Abstract: A redundant array of independent nodes are networked together. Each node executes an instance of an application that provides object-based storage. The nodes are grouped into systems each having multiple nodes. Objects in the systems have access control lists (ACLs) associated therewith. A method of providing a search key to each ACL in any one system comprises: selecting a region for each metadata object pertaining to the objects in the system; and generating, for each ACL associated with an object in the system, an ACL ID (identifier) as a search key which includes the region number of the region selected for the metadata object pertaining to the object, a region map level corresponding to the region selected, and a monotonically increasing counter value that is automatically incremented each time an ACL ID is generated. The ACL ID remains unique during reconfiguration via splitting/merging existing distributed portions of the database.

Abstract translation: 独立节点的冗余阵列联网在一起。 每个节点执行提供基于对象的存储的应用程序的实例。 节点被分组成具有多个节点的系统。 系统中的对象具有与其相关联的访问控制列表（ACL）。 在任何一个系统中为每个ACL提供搜索关键字的方法包括：为与系统中的对象相关联的每个元数据对象选择一个区域; 并且对于与系统中的对象相关联的每个ACL，生成作为搜索关键字的ACL ID（标识符），其包括为与该对象相关联的元数据对象选择的区域的区域号，对应于该区域的区域映射级别 选择，以及每次生成ACL ID时自动递增的单调递增的计数器值。 在重新配置期间，ACL ID通过分割/合并数据库的现有分布式部分而保持唯一。

公开(公告)号：US20140157049A1

公开(公告)日：2014-06-05

申请号：US13924666

申请日：2013-06-24

Applicant: Hitachi Data Systems Corporation

Inventor： Alan G. Bryant ,  Kevin S. Grimaldi ,  Trek Palmer ,  David B. Pinkney

IPC: G06F11/14

CPC classification number: G06F11/1464 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/067 ,  G06F11/1425 ,  G06F11/143 ,  G06F11/1435 ,  G06F11/1451 ,  G06F11/1662 ,  G06F11/2094 ,  G06F2201/80 ,  G06F2201/84

Abstract: An “operate with missing region” feature allows a cluster to continue servicing reads for available regions even when some regions are missing. Upon a given node failure condition, the cluster is placed in an effective read-only mode for all regions. The node failure condition typically is one where there has been a failure of an authoritative region copy and no backup copy is then available. Typically, “read-only” means no client write or update requests succeed while the cluster is in this state. Those requests should fail with an error message that indicates failure because of the read-only status. Preferably, such requests are re-tried. In this mode, regions are only allowed to perform read operations but the cluster continues to operate with missing regions, and missing regions are entered on a region map. The cluster then automatically recovers returning missing regions, after which it leaves the read-only state.

Abstract translation: “使用缺少区域”功能允许集群继续为可用区域读取数据，即使某些区域丢失。 在给定的节点故障条件下，将集群置于所有区域的有效只读模式。 节点故障条件通常是权威区域副本失败，然后没有备份副本可用的情况。 通常，“只读”表示在集群处于此状态时，客户端写入或更新请求不会成功。 这些请求应该失败，并显示一条错误消息，指示由于只读状态而导致失败。 优选地，重新尝试这样的请求。 在这种模式下，只允许区域执行读取操作，但是群集继续在缺少的区域中运行，并且在区域映射中输入缺失的区域。 然后，群集会自动恢复返回的缺失区域，之后它离开只读状态。

公开(公告)号：US09904605B2

公开(公告)日：2018-02-27

申请号：US14930751

申请日：2015-11-03

Applicant: HITACHI DATA SYSTEMS CORPORATION

Inventor： Alan G. Bryant ,  Kevin S. Grimaldi ,  Trek Palmer ,  David B. Pinkney

IPC: G06F17/30 ,  G06F11/20 ,  G06F11/16 ,  G06F11/14 ,  G06F3/06

CPC classification number: G06F11/1464 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/067 ,  G06F11/1425 ,  G06F11/143 ,  G06F11/1435 ,  G06F11/1451 ,  G06F11/1662 ,  G06F11/2094 ,  G06F2201/80 ,  G06F2201/84

Abstract: An “operate with missing region” feature allows a cluster to continue servicing reads for available regions even when some regions are missing. Upon a given node failure condition, the cluster is placed in an effective read-only mode for all regions. The node failure condition typically is one where there has been a failure of an authoritative region copy and no backup copy is then available. Typically, “read-only” means no client write or update requests succeed while the cluster is in this state. Those requests should fail with an error message that indicates failure because of the read-only status. Preferably, such requests are re-tried. In this mode, regions are only allowed to perform read operations but the cluster continues to operate with missing regions, and missing regions are entered on a region map. The cluster then automatically recovers returning missing regions, after which it leaves the read-only state.

公开(公告)号：US09183096B2

公开(公告)日：2015-11-10

申请号：US13924666

申请日：2013-06-24

Applicant: Hitachi Data Systems Corporation

Inventor： Alan G. Bryant ,  Kevin S. Grimaldi ,  Trek Palmer ,  David B. Pinkney

IPC: G06F17/30 ,  G06F11/14 ,  G06F11/16 ,  G06F11/20

CPC classification number: G06F11/1464 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/067 ,  G06F11/1425 ,  G06F11/143 ,  G06F11/1435 ,  G06F11/1451 ,  G06F11/1662 ,  G06F11/2094 ,  G06F2201/80 ,  G06F2201/84

Abstract: An “operate with missing region” feature allows a cluster to continue servicing reads for available regions even when some regions are missing. Upon a given node failure condition, the cluster is placed in an effective read-only mode for all regions. The node failure condition typically is one where there has been a failure of an authoritative region copy and no backup copy is then available. Typically, “read-only” means no client write or update requests succeed while the cluster is in this state. Those requests should fail with an error message that indicates failure because of the read-only status. Preferably, such requests are re-tried. In this mode, regions are only allowed to perform read operations but the cluster continues to operate with missing regions, and missing regions are entered on a region map. The cluster then automatically recovers returning missing regions, after which it leaves the read-only state.

Abstract translation: “使用缺少区域”功能允许集群继续为可用区域读取数据，即使某些区域丢失。 在给定的节点故障条件下，将集群置于所有区域的有效只读模式。 节点故障条件通常是权威区域副本失败，然后没有备份副本可用的情况。 通常，“只读”表示在集群处于此状态时，客户端写入或更新请求不会成功。 这些请求应该失败，并显示一条错误消息，指示由于只读状态而导致失败。 优选地，重新尝试这样的请求。 在这种模式下，只允许区域执行读取操作，但是群集继续在缺少的区域中运行，并且在区域映射中输入缺失的区域。 然后，群集会自动恢复返回的缺失区域，之后它离开只读状态。