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1. 发明申请

WO2008005367A2 DYNAMIC, ON-DEMAND STORAGE AREA NETWORK (SAN) CACHE 审中-公开
标题翻译：动态，需求存储区域网络（SAN）CACHE
公开(公告)号：WO2008005367A2
公开(公告)日：2008-01-10
申请号：PCT/US2007/015188
申请日：2007-06-29
申请人： CISCO TECHNOLOGY, INC. , RAO, Raghavendra J. , BASAVAIAH, Murali , PARIKH, Urshit , CHANDRASEKARAN, Varagur
发明人： RAO, Raghavendra J. , BASAVAIAH, Murali , PARIKH, Urshit , CHANDRASEKARAN, Varagur
IPC分类号： G06F12/00
CPC分类号： G06F12/0873 , G06F12/0813 , G06F2212/263 , G06F2212/314 , H04L67/1097 , H04L67/2842
摘要： Disclosed are apparatus and methods for facilitating caching in a storage area network (SAN) (131). In general, data transfer traffic between one or more hosts (144) and one or more memory portions in one or more storage device(s) (132) is redirected to one or more cache modules (152). One or more network devices (e.g., switches) of the SAN can be configured to redirect data transfer for a particular memory portion of one or more storage device(s) to a particular cache module. As needed, data transfer traffic for any number of memory portions and storage devices can be identified for or removed from being redirected to a particular cache module (102, 306). Also, any number of cache modules can be utilized for receiving redirected traffic so that such redirected traffic is divided among such cache modules in any suitable proportion for enhanced flexibility.
摘要翻译：公开了一种便于在存储区域网络（SAN）（131）中进行高速缓存的装置和方法。通常，一个或多个主机（144）与一个或多个存储设备（132）中的一个或多个存储器部分之间的数据传输流量被重定向到一个或多个缓存模块（152）。可以将SAN的一个或多个网络设备（例如，交换机）配置为将一个或多个存储设备的特定存储器部分的数据传输重定向到特定高速缓存模块。根据需要，可以为任何数量的存储器部分和存储设备的数据传输流量被识别或被重定向到特定高速缓存模块（102,306）。而且，任何数量的高速缓存模块都可以用于接收重定向流量，使得这些重定向流量以任何合适的比例被划分在这些高速缓存模块之间以增强灵活性。

2. 发明申请

WO2005055497A2 APPARATUS AND METHOD FOR PERFORMING FAST FIBRE CHANNEL WRITE OPERATIONS OVER RELATIVELY HIGH LATENCY NETWORKS 审中-公开
标题翻译：用于执行相对较高时间网络的快速光纤通道写操作的装置和方法
公开(公告)号：WO2005055497A2
公开(公告)日：2005-06-16
申请号：PCT/US2004/039904
申请日：2004-11-29
申请人： CISCO TECHNOLOGY, INC. , BASAVAIAH, Murali , AMBATI, Satish , IYENGAR, Magesh , EDSALL, Thomas , DUTT, Dinesh, G. , GAI, Silvano , CHANDRASEKARAN, Varagur, V.
发明人： BASAVAIAH, Murali , AMBATI, Satish , IYENGAR, Magesh , EDSALL, Thomas , DUTT, Dinesh, G. , GAI, Silvano , CHANDRASEKARAN, Varagur, V.
IPC分类号： H04L
CPC分类号： G06F3/0659 , G06F3/0613 , G06F3/0635 , G06F3/067 , H04L67/1097
摘要： A method and apparatus to improve the performance of a SCSI write over a high latency network. The apparatus includes a first Switch close to the initiator in a first SAN and a second Switch close to the target in a second SAN. In various embodiments, the two Switches are border switches connecting their respective SANs to a relatively high latency network between the two SANs. In addition, the initiator can be either directly connected or indirectly connected to the first Switch in the first SAN. The target can also be either directly or indirectly connected to the second Switch in the second SAN. During operation, the method includes the first Switch sending Transfer Ready (Xfr_rdy) frame(s) based on buffer availability to the initiating Host in response to a SCSI Write command from the Host directed to the target. The first and second Switches then coordinate with one another by sending Transfer Ready commands to each other independent of the target's knowledge. The second switch buffers the data received from the Host until the target indicates it is ready to receive the data. Since the Switches send frames to the initiating Host independent of the target, the Switches manipulate the OX_ID and RX_ID fields in the Fibre Channel header of the various commands associated with the SCSI Write. The OX_ID and RX_ID fields are manipulated so as to trap the commands and so that the Switches can keep track of the various commands associated with the SCSI write.
摘要翻译：一种通过高延迟网络提高SCSI写入性能的方法和装置。该设备包括靠近第一SAN中的发起者的第一交换机和在第二SAN中靠近目标的第二交换机。在各种实施例中，两个交换机是将它们各自的SAN连接到两个SAN之间相对较高延迟的网络的边界交换机。此外，启动器可以直接连接或间接连接到第一个SAN中的第一个交换机。目标也可以直接或间接地连接到第二个SAN中的第二个交换机。在操作期间，该方法包括响应于从指向目标的主机的SCSI写入命令，基于发起主机的缓冲区可用性的第一个交换机发送传输就绪（Xfr_rdy）帧。第一个和第二个交换机然后通过发送传输就绪命令相互协调，独立于目标的知识。第二个交换机缓存从主机接收的数据，直到目标指示它准备好接收数据。由于交换机将发送帧发送到独立于目标的发起主机，交换机将处理与SCSI写入相关联的各种命令的光纤通道报头中的OX_ID和RX_ID字段。操作OX_ID和RX_ID字段以捕获命令，以便交换机可以跟踪与SCSI写入相关联的各种命令。

3. 发明申请

WO2005091826A2 ENCODING A TCP OFFLOAD ENGINE WITHIN FCP 审中-公开
标题翻译：在FCP中编写TCP卸载引擎
公开(公告)号：WO2005091826A2
公开(公告)日：2005-10-06
申请号：PCT/US2005/004941
申请日：2005-02-16
申请人： CISCO TECHNOLOGY, INC. , KUIK, Timothy , THOMPSON, David , DEGROOTE, Stephen , BASAVAIAH, Murali , PARTHASARATHY, Anand
发明人： KUIK, Timothy , THOMPSON, David , DEGROOTE, Stephen , BASAVAIAH, Murali , PARTHASARATHY, Anand
IPC分类号： H04J3/16 , H04L29/06 , H04L29/08
CPC分类号： H04L69/16 , H04L67/1097 , H04L69/08
摘要： The present invention defines a new protocol for communicating with an offload engine that provides Transmission Control Protocol ("TCP") termination over a Fibre Channel ("FC") fabric. The offload engine terminates all protocols up to and including TCP and performs the processing associated with those layers. The offload protocol guarantees delivery and is encapsulated within FCP-formatted frames. Thus, the TCP streams are reliably passed to the host. Additionally, using this scheme, the offload engine can provide parsing of the TCP stream to further assist the host. The present invention also provides network devices (and components thereof) that are configured to perform the foregoing methods. The invention further defines how network attached storage ("NAS") protocol data units ("PDUs") are parsed and delivered.
摘要翻译：本发明定义了一种用于与卸载引擎进行通信的新协议，该卸载引擎通过光纤通道（“FC”）结构提供传输控制协议（“TCP”）终止。卸载引擎终止直到并包括TCP的所有协议，并执行与这些层相关联的处理。卸载协议保证传送，并封装在FCP格式的帧中。因此，TCP流可靠地传递到主机。另外，使用该方案，卸载引擎可以提供TCP流的解析以进一步协助主机。本发明还提供了被配置为执行前述方法的网络设备（及其组件）。本发明进一步定义如何解析和传送网络连接存储（“NAS”）协议数据单元（“PDU”）。

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