公开(公告)号：WO2005055040A3

公开(公告)日：2005-12-08

申请号：PCT/EP2004052800

申请日：2004-11-04

Applicant: IBM ,  IBM FRANCE ,  CHEN JAMES C ,  HUYNH MINH-NGOC L ,  KALOS MATTHEW J ,  FUNG CHUNG M

Inventor： CHEN JAMES C ,  HUYNH MINH-NGOC L ,  KALOS MATTHEW J ,  FUNG CHUNG M

IPC: G06F3/06 ,  H04L12/56

CPC classification number: G06F3/065 ,  G06F3/0611 ,  G06F3/067 ,  G06F3/0689 ,  H04L47/10

Abstract: Methods, system and computer program product are provided to improve, the efficiency of data transfers in a PPRC environment. Any or all of three features may be implemented, each of which reduces the number of round trips required for the exchange of handshaking, data and control information. A first feature includes disabling the "transfer ready" acknowledgment which normally occurs between a primary storage controller and a secondary storage controller. A second feature includes pre-allocating payload and data buffers in the secondary storage controller. A third feature includes packaging write control information with a write command in an extended command descriptor block (CDB). Such a step eliminated the need for a separate transmission of the write control information. The CDB is transmitted along with a data block from the primary storage controller to the secondary storage controller and placed in the respective, pre-allocated buffers. Data may also be pipelined to the secondary. By decreasing the response time for data transfers, the distance separating the primary and secondary storage controllers may be increased.

Abstract translation: 提供了方法，系统和计算机程序产品，以提高PPRC环境中数据传输的效率。 可以实现三个特征中的任何一个或全部特征，其中每个特征都减少交换握手，数据和控制信息所需的往返次数。 第一个特征包括禁用通常在主存储控制器和辅助存储控制器之间发生的“传输就绪”确认。 第二个功能包括在辅助存储控制器中预先分配有效负载和数据缓冲区。 第三特征包括利用写入命令在扩展命令描述符块（CDB）中打包写入控制信息。 这样的步骤消除了对写入控制信息的单独传输的需要。 CDB与数据块一起从主存储控制器传输到辅助存储控制器，并放置在各自的预先分配的缓冲区中。 数据也可以流水到次要位置。 通过减少数据传输的响应时间，可以增加分隔主存储控制器和辅助存储控制器的距离。

公开(公告)号：WO2005055040A2

公开(公告)日：2005-06-16

申请号：PCT/EP2004/052800

申请日：2004-11-04

Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION ,  Compagnie IBM FRANCE ,  CHEN, James C. ,  HUYNH, Minh-Ngoc L. ,  KALOS, Matthew J. ,  FUNG, Chung M.

Inventor： CHEN, James C. ,  HUYNH, Minh-Ngoc L. ,  KALOS, Matthew J. ,  FUNG, Chung M.

IPC: G06F3/06

CPC classification number: G06F3/065 ,  G06F3/0611 ,  G06F3/067 ,  G06F3/0689 ,  H04L47/10

Abstract: Methods, system and computer program product are provided to improve, the efficiency of data transfers in a PPRC environment. Any or all of three features may be implemented, each of which reduces the number of round trips required for the exchange of handshaking, data and control information. A first feature includes disabling the "transfer ready" acknowledgment which normally occurs between a primary storage controller and a secondary storage controller. A second feature includes pre-allocating payload and data buffers in the secondary storage controller. A third feature includes packaging write control information with a write command in an extended command descriptor block (CDB). Such a step eliminated the need for a separate transmission of the write control information. The CDB is transmitted along with a data block from the primary storage controller to the secondary storage controller and placed in the respective, pre-allocated buffers. Data may also be pipelined to the secondary. By decreasing the response time for data transfers, the distance separating the primary and secondary storage controllers may be increased.

Abstract translation: 提供方法，系统和计算机程序产品来提高PPRC环境中数据传输的效率。 可以实现三个特征中的任何一个或全部，每个特征减少交换握手，数据和控制信息所需的往返次数。 第一个功能包括禁用通常在主存储控制器和辅助存储控制器之间发生的“传送就绪”确认。 第二特征包括在副存储控制器中预分配有效载荷和数据缓冲器。 第三个特征包括在扩展命令描述符块（CDB）中用写入命令封装写入控制信息。 这样的步骤消除了对写入控制信息的单独发送的需要。 CDB与来自主存储控制器的数据块一起传送到辅助存储控制器并且被放置在相应的预先分配的缓冲器中。 数据也可以流水线到次级。 通过减少数据传输的响应时间，可以增加分离主存储控制器和辅助存储控制器的距离。