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公开(公告)号：US20060004765A1
公开(公告)日：2006-01-05
申请号：US10864605
申请日：2004-06-10
申请人： Owen Anderson , Binny Gill , Leo Luan , Manuel Pereira , Geoffrey Riegel
发明人： Owen Anderson , Binny Gill , Leo Luan , Manuel Pereira , Geoffrey Riegel
IPC分类号： G06F17/30
CPC分类号： G06F17/30067
摘要： Addressed is a system and method for remote data caching and replication by local copy maintenance of remote data within a SAN file system. Distributed Storage Tank (DST), an extension to a SAN file system, provides for transparent SAN client access of local copies by importing, exporting, and storing data using network file access protocols as well as by providing assurance of metadata and file content validity. A Remote Access Agent (RAA) handles protocol implementation and conversion necessary for communication with remote data sources. Controlled by a consistency policy, consistency is maintained by RAA fetching and updating local copies if modifications have occurred to a file since it was first stored as a local copy in local storage. Additionally, RAA returns metadata pertaining to the requested data. A SAN client obtains metadata corresponding to the requested data and utilizes it to directly access locally stored copies of remote data.
摘要翻译： 解决的是通过SAN文件系统中的远程数据的本地复制维护来进行远程数据缓存和复制的系统和方法。 分布式存储库（DST）是SAN文件系统的扩展，通过使用网络文件访问协议导入，导出和存储数据以及提供元数据和文件内容有效性的保证，为本地副本的透明SAN客户端访问提供了便利。 远程访问代理（RAA）处理与远程数据源通信所需的协议实现和转换。 由一致性策略控制，由于RAA首次将其作为本地副本存储在本地存储中，因此RAA会在文件发生修改时，获取和更新本地副本，从而保持一致性。 此外，RAA返回与所请求数据有关的元数据。 SAN客户端获取与所请求数据相对应的元数据，并利用它来直接访问本地存储的远程数据副本。
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公开(公告)号：US20060080401A1
公开(公告)日：2006-04-13
申请号：US10953243
申请日：2004-09-29
申请人： Binny Gill , Leo Luan
发明人： Binny Gill , Leo Luan
IPC分类号： G06F15/16
CPC分类号： G06F17/30902 , Y10S707/99931 , Y10S707/99953
摘要： Network latencies are reduced by detecting a metadata access call for filesystem metadata contained in a filesystem node of remotely located filesystem. The metadata corresponding to the metadata access call is fetched when the metadata corresponding to the metadata access call is not contained in a local filesystem cache that has a hierarchical structure corresponding to a hierarchical structure of the remotely located filesystem. Metadata related to the metadata corresponding to the metadata access call from the remotely located filesystem is prefetched when the related metadata is not contained in the local filesystem cache. The metadata related to the metadata corresponding to the access call can be contained in a child node or a parent node of the node containing the metadata corresponding to the access call, or the descendants of such nodes.
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公开(公告)号：US08229899B2
公开(公告)日：2012-07-24
申请号：US12706233
申请日：2010-02-16
IPC分类号： G06F17/00
CPC分类号： G06F17/30067
摘要： A system and method is disclosed for maintaining, in a Storage Area Network (SAN), the consistency of a local copy of a remote file system sub-tree obtained from a remote source. Directory structure of the remote file system sub-tree is mapped to a remote container attached to the SAN and each remote object of the remote file system sub-tree is represented as a local object component of the remote container. Next, each of the local objects are labeled with attributes associated with the represented remote object, and metadata describing each of the local objects is stored in a metadata server. Also, a consistency policy is associated with each of the local objects in the remote container (wherein the policy defines conditions for checking freshness of said labeled attributes), and the local object components of remote container is updated in accordance with the consistency policy.
摘要翻译： 公开了一种用于在存储区域网络（SAN）中维护从远程源获得的远程文件系统子树的本地副本的一致性的系统和方法。 远程文件系统子树的目录结构映射到连接到SAN的远程容器，远程文件系统子树的每个远程对象都表示为远程容器的本地对象组件。 接下来，每个本地对象被标记有与所表示的远程对象相关联的属性，并且描述每个本地对象的元数据被存储在元数据服务器中。 此外，一致性策略与远程容器中的每个本地对象（其中策略定义用于检查所标记的属性的新鲜度的条件）相关联，并且根据一致性策略来更新远程容器的本地对象组件。
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