公开(公告)号：US09892075B2

公开(公告)日：2018-02-13

申请号：US14965750

申请日：2015-12-10

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Prabhath Sajeepa ,  Sagar Borikar

IPC: G06F13/38 ,  G06F13/24 ,  G06F13/16 ,  G06F13/40 ,  G06F13/42

CPC classification number: G06F13/385 ,  G06F13/1631 ,  G06F13/24 ,  G06F13/4022 ,  G06F13/4282

Abstract: An example method for facilitating policy-driven storage in a microserver computing environment is provided and includes receiving, at an input/output (I/O) adapter in a microserver chassis having a plurality of compute nodes and a shared storage resource, policy contexts prescribing storage access parameters of respective compute nodes and enforcing the respective policy contexts on I/O operations by the compute nodes, in which respect a particular I/O operation by any compute node is not executed if the respective policy context does not allow the particular I/O operation. The method further includes allocating tokens to command descriptors associated with I/O operations for accessing the shared storage resource, identifying a violation of any policy context of any compute node based on availability of the tokens, and throttling I/O operations by other compute nodes until the violation disappears.

公开(公告)号：US20180011807A1

公开(公告)日：2018-01-11

申请号：US15699270

申请日：2017-09-08

Applicant: Cisco Technology, Inc.

Inventor： Sagar Borikar ,  Prabhath Sajeepa

IPC: G06F13/36 ,  G06F13/40 ,  G06F13/16 ,  G06F9/455 ,  G06F13/42 ,  G06F12/02

CPC classification number: G06F13/36 ,  G06F9/45558 ,  G06F12/0223 ,  G06F12/1081 ,  G06F13/105 ,  G06F13/1663 ,  G06F13/4068 ,  G06F13/4282 ,  G06F2009/45579 ,  G06F2009/45583 ,  G06F2009/45595 ,  G06F2212/206

Abstract: A method is provided in one example embodiment and includes receiving by a network element a request from a network device connected to the network element to update a shared resource maintained by the network element; subsequent to the receipt, identifying a Base Address Register Resource Table (“BRT”) element assigned to a Peripheral Component Interconnect (“PCI”) adapter of the network element associated with the network device, wherein the BRT points to the shared resource; changing an attribute of the identified BRT from read-only to read/write to enable the identified BRT to be written by the network device; and notifying the network device that the attribute of the identified BRT has been changed, thereby enabling the network device to update the shared resource via a Base Address Register (“BAR”) comprising the identified BRT.

公开(公告)号：US20170075855A1

公开(公告)日：2017-03-16

申请号：US14853598

申请日：2015-09-14

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Prabhath Sajeepa ,  Sagar Borikar

IPC: G06F15/167

CPC classification number: G06F15/17331

Abstract: An example method for facilitating low latency remote direct memory access (RDMA) for microservers is provided and includes generating queue pair (QPs) in a memory of an input/output (I/O) adapter of a microserver chassis having a plurality of compute nodes executing thereon, the QPs being associated with a remote direct memory access (RDMA) connection between a first compute node and a second compute node in the microserver chassis, setting a flag in the QPs to indicate that the RDMA connection is local to the microserver chassis, and performing a loopback of RDMA packets within the I/O adapter from one memory region in the I/O adapter associated with the first compute node of the RDMA connection to another memory region in the I/O adapter associated with the second compute node of the RDMA connection.

Abstract translation: 提供了一种用于促进用于微服务器的低延迟远程直接存储器访问（RDMA）的示例性方法，并且包括在具有多个计算节点的微服务器机箱的输入/输出（I / O）适配器的存储器中生成队列对（QP） 在其上执行，QP与微服务器机架中的第一计算节点和第二计算节点之间的远程直接存储器访问（RDMA）连接相关联，在QP中设置标志以指示RDMA连接是微服务器机箱的本地 并且将与所述RDMA连接的第一计算节点相关联的所述I / O适配器中的一个存储器区域中的所述I / O适配器内的RDMA分组环回到与所述第二计算节点相关联的所述I / O适配器中的另一存储器区域 的RDMA连接。