公开(公告)号：US09619542B2

公开(公告)日：2017-04-11

申请号：US14245296

申请日：2014-04-04

Applicant: Citrix Systems, Inc.

Inventor： Sandeep Kamath ,  Mahesh Arumugam ,  Jaidev Sridhar ,  Abhishek Chauhan ,  Sandhya Gopinath

IPC: G06F17/30

CPC classification number: G06F17/30575

Abstract: The present application is directed towards systems and methods of hunting for a hash table entry in a hash table distributed over a multi-node system. More specifically, when entries are created in an ASDR table, the owner node of the entry may replicate the entry onto a non-owner node. The replica can act as a backup of the ASDR table entry in the event the node leaves the multi-mode system. When the node returns to the multi-node system, the node may no longer have the most up to date ASDR table entries, and may hunt to find the existence of the value associated with the entry. Responsive to receiving a request for an entry that may be outdated on the node, the node sends a request down a replication chain for an updated copy of the ASDR table entry from one of the replicas. Responsive to receiving the replica copy of the entry, the node responds to the client's request for the entry.

公开(公告)号：US09519518B2

公开(公告)日：2016-12-13

申请号：US13895284

申请日：2013-05-15

Applicant: Citrix Systems, Inc.

Inventor： Sandeep Kamath ,  Mahesh Arumugam ,  Vishnu Itta

IPC: G06F15/16 ,  G06F9/50 ,  H04L29/08

CPC classification number: G06F9/5027 ,  G06F9/5077 ,  G06F9/5088 ,  H04L67/1008

Abstract: The present invention is directed towards systems and methods deploying a virtual server on a subset of devices in a cluster of devices. A first device of a cluster of devices intermediary between at least one client and at least one server, may identify a first virtual server to establish on one or more devices of the cluster. The first device may associate, to the identified virtual server, a group comprising a subset of devices in the cluster of devices. The cluster may establish the first virtual server on each device in the group responsive to associating the group to the first virtual server. Each virtual server on each device of the group may be assigned a same internet protocol address.

Abstract translation: 本发明涉及在设备集群中的设备子集上部署虚拟服务器的系统和方法。 在至少一个客户端和至少一个服务器之间中介的设备集群的第一设备可以识别在集群的一个或多个设备上建立的第一虚拟服务器。 第一设备可以将与包括设备集群中的设备子集的组相关联的所识别的虚拟服务器。 集群可以响应于将组与第一虚拟服务器相关联而在组中的每个设备上建立第一虚拟服务器。 组中每个设备上的每个虚拟服务器可以被分配相同的因特网协议地址。

公开(公告)号：US09426220B2

公开(公告)日：2016-08-23

申请号：US14244949

申请日：2014-04-04

Applicant: Citrix Systems, Inc.

Inventor： Abhishek Chauhan ,  Sandhya Gopinath ,  Sandeep Kamath ,  Mahesh Arumugam ,  Tushar Kanekar

IPC: G06F15/167 ,  H04L29/08

CPC classification number: H04L67/1097 ,  H04L67/1095

Abstract: The present application is directed towards using a distributed hash table to track the use of resources and/or maintain the persistency of resources across the plurality of nodes in the multi-node system. More specifically, the systems and methods can maintain the persistency of resources across the plurality of nodes by the use of a global table. A global table may be maintained on each node. Each node's global table enables efficient storage and retrieval of distributed hash table entries. Each global table may contain a linked list of the cached distributed hash table entries that are currently stored on a node.

Abstract translation: 本申请涉及使用分布式哈希表来跟踪资源的使用和/或维护多节点系统中的多个节点之间的资源的持续性。 更具体地，系统和方法可以通过使用全局表来维护跨越多个节点的资源的持久性。 可以在每个节点上维护全局表。 每个节点的全局表可以有效地存储和检索分布式哈希表项。 每个全局表可以包含当前存储在节点上的高速缓存的分布式散列表条目的链接列表。

公开(公告)号：US20140304231A1

公开(公告)日：2014-10-09

申请号：US14245296

申请日：2014-04-04

Applicant: Citrix Systems, Inc.

Inventor： Sandeep Kamath ,  Mahesh Arumugam ,  Jaidev Sridhar ,  Abhishek Chauhan ,  Sandhya Gopinath

IPC: G06F17/30

CPC classification number: G06F17/30575

Abstract: The present application is directed towards systems and methods of hunting for a hash table entry in a hash table distributed over a multi-node system. More specifically, when entries are created in an ASDR table, the owner node of the entry may replicate the entry onto a non-owner node. The replica can act as a backup of the ASDR table entry in the event the node leaves the multi-mode system. When the node returns to the multi-node system, the node may no longer have the most up to date ASDR table entries, and may hunt to find the existence of the value associated with the entry. Responsive to receiving a request for an entry that may be outdated on the node, the node sends a request down a replication chain for an updated copy of the ASDR table entry from one of the replicas. Responsive to receiving the replica copy of the entry, the node responds to the client's request for the entry.

Abstract translation: 本申请涉及在分布在多节点系统上的哈希表中搜索散列表条目的系统和方法。 更具体地说，当在ASDR表中创建条目时，条目的所有者节点可以将条目复制到非所有者节点。 在节点离开多模式系统的情况下，副本可以作为ASDR表条目的备份。 当节点返回到多节点系统时，节点可能不再具有最新的ASDR表条目，并且可以寻找找到与条目相关联的值的存在。 响应于接收到可能在节点上过时的条目的请求，节点从复制链路之一向ASDR表条目的更新副本发送针对复制链的请求。 响应于接收该条目的复制副本，节点响应客户端对该条目的请求。

公开(公告)号：US10824409B2

公开(公告)日：2020-11-03

申请号：US16122446

申请日：2018-09-05

Applicant: Citrix Systems, Inc.

Inventor： Mahesh Arumugam ,  Sergey Verzunov ,  Sandeep Kamath ,  Josephine Suganthi ,  Anil Shetty ,  Abhishek Chauhan

IPC: G06F8/60 ,  G06F8/71 ,  G06F8/61

Abstract: The present disclosure is directed towards systems and methods for managing application delivery in a network. A device intermediary to a client and one or more servers that provide a plurality of applications, receives a request from the client to access a first application of the plurality of applications. The device holds the request and retrieves, while holding the request, configuration information for an instance of the first application from a configuration repository. The device configures a virtual internet protocol (“VIP”) server using the configuration information for the instance of the first application. The device processes the request via the VIP server.

公开(公告)号：US10101981B2

公开(公告)日：2018-10-16

申请号：US14707653

申请日：2015-05-08

Applicant: Citrix Systems, Inc.

Inventor： Mahesh Arumugam ,  Sergey Verzunov ,  Sandeep Kamath ,  Josephine Suganthi ,  Anil Shetty ,  Abhishek Chauhan

IPC: G06F8/60 ,  G06F8/61 ,  G06F8/71

Abstract: The present disclosure is directed towards systems and methods for managing application delivery in a network. A device intermediary to a client and one or more servers that provide a plurality of applications, receives a request from the client to access a first application of the plurality of applications. The device holds the request and retrieves, while holding the request, configuration information for an instance of the first application from a configuration repository. The device configures a virtual internet protocol (“VIP”) server using the configuration information for the instance of the first application. The device processes the request via the VIP server.

公开(公告)号：US20140304355A1

公开(公告)日：2014-10-09

申请号：US14245299

申请日：2014-04-04

Applicant: Citrix Systems, Inc.

Inventor： Sandeep Kamath ,  Mahesh Arumugam ,  Anil Shetty ,  Gopinath Sikha ,  Jaidev Sridhar

IPC: H04L29/08

CPC classification number: H04L67/2842 ,  G06F17/3033 ,  H04L43/0852 ,  H04L67/1097 ,  H04L67/2852

Abstract: The present application is directed towards invalidating (also referred to as poisoning) ASDR table entries that are determined to be inaccurate because of changes to a multi-node system. For example, when a node leaves or enters a multi-node system, the ownership of the entries in the ASDR table can change thus invalidating cached and replica entries. More specifically, the system and methods disclosed herein include searching an ASDR table for cached entries responsive to the system determining the multi-node system has changed. After finding a cached entry, the system may determine if the entry should be poisoned. The decision to poison the entry may be responsive to the creation time of the entry, the time when the change to the multi-node system occurred, and in the case of a replica, the owner of the replica's position in a replication chain relative to source of the replica.

Abstract translation: 本申请涉及由于对多节点系统的改变而被确定为不准确的无效（也称为中毒）ASDR表条目。 例如，当节点离开或进入多节点系统时，ASDR表中的条目的所有权可以改变，从而使高速缓存和副本条目无效。 更具体地，本文公开的系统和方法包括：响应于系统确定多节点系统已经改变，搜索ASDR表以获得缓存条目。 找到缓存条目后，系统可能会确定条目是否应该被中毒。 毒品入场的决定可以响应入场的创建时间，发生多节点系统的更改的时间，而在副本的情况下，副本在复制链中的位置相对于相对于 复制品的来源。

公开(公告)号：US09888068B2

公开(公告)日：2018-02-06

申请号：US14244504

申请日：2014-04-03

Applicant: Citrix Systems, Inc.

Inventor： Sandeep Kamath ,  Mahesh Arumugam ,  Anoop Menon

IPC: H04L29/08 ,  H04L29/06

CPC classification number: H04L67/1036 ,  H04L63/04 ,  H04L63/166

Abstract: The present application is directed towards systems and methods for managing ownership of one or more SSL sessions. A cluster of nodes intermediary between at least one client server may maintain a succession list for at least one session of a first client from the at least one client. The succession list may include a list of nodes within the cluster and an order of succession for the nodes to transfer ownership of the at least one session. A first node of the cluster may enter an operational state for managing one or more sessions between the at least one client and the at least one server. A second node of the cluster may initiate, based on the succession list and responsive to the first node entering the operational state, a transfer of ownership of the at least one session from the second node to the first node.

公开(公告)号：US09596305B2

公开(公告)日：2017-03-14

申请号：US14245568

申请日：2014-04-04

Applicant: Citrix Systems, Inc.

Inventor： Abhishek Chauhan ,  Sandhya Gopinath ,  Sandeep Kamath ,  Anil Shetty ,  Josephine Suganthi

IPC: G06F15/167 ,  H04L29/08

CPC classification number: H04L67/1097 ,  H04L29/08594 ,  H04L29/08882 ,  H04L67/142

Abstract: The present application is directed towards ASDR table contract renewal. In some embodiments, a core may cache an ASDR table entry received from an owner core such that when the entry is needed again the core does not need to re-request the entry from the owner core. As storing a cached copy of the entry allows the non-owner core to use an ASDR table entry without requesting the entry from the owner core, the owner core may be unaware of an ASDR table entry's use by a non-owner core. To ensure the owner core keeps the ASDR table entry alive, which the non-owner core has cached, the non-owner core may perform contract renewal for each of its recently used cached entries. The contract renewal method may include sending a message to the owner core that indicates which cached ASDR table entries the non-owner core has recently used or accessed. Responsive to receiving the message the owner core may reset a timeout period associated with the ASDR table entry.

Abstract translation: 本申请针对ASDR表合同续订。 在一些实施例中，核可以缓存从所有者核心接收的ASDR表条目，使得当再次需要该条目时，核心不需要从所有者核心重新请求条目。 由于存储条目的缓存副本允许非所有者内核使用ASDR表条目，而不从所有者核心请求条目，所有者核心可能不知道ASDR表条目由非所有者内核使用。 为了确保所有者核心保持ASDR表条目活着（非所有者核心已经缓存），非所有者核心可以为其最近使用的每个缓存条目执行合同续订。 合同更新方法可以包括向所有者内核发送消息，指示哪个高速缓存的ASDR表条目是非所有者内核最近使用或访问的。 响应于接收消息，所有者核心可以重置与ASDR表条目相关联的超时时间段。

公开(公告)号：US09596299B2

公开(公告)日：2017-03-14

申请号：US14244597

申请日：2014-04-03

Applicant: Citrix Systems, Inc.

Inventor： Sreedhar Yengalasetti ,  Raghav Somanahalli Narayana ,  Sandeep Kamath

IPC: G06F15/173 ,  H04L29/08 ,  H04L12/24 ,  H04L29/12

CPC classification number: H04L67/1036 ,  H04L41/0896 ,  H04L61/1511 ,  H04L67/1031 ,  H04L67/28

Abstract: The present application is directed towards systems and methods for configuring and applying autoscaling to a service group of an intermediary device for a domain based server. All the IP addresses resolved by the domain name of the server and that are determined as up will automatically become members of the service group. The resolver monitor will resolve the server's domain name based on the TTL (Time to Live) value in the address record or whenever the appropriate command is executed. Each time the domain is resolved, if there is a change in the number of IP addresses resolved, then the members of the service group will shrink or expand based on the number of IP addresses resolved.

Abstract translation: 本申请涉及用于配置和应用自动缩放到用于基于域的服务器的中间设备的服务组的系统和方法。 由服务器的域名解析并被确定为up的所有IP地址将自动成为服务组的成员。 解析器监视器将根据地址记录中的TTL（生存时间）值或执行相应命令来解析服务器的域名。 每次解析域时，如果解析了IP地址数量有变化，则根据解析的IP地址数量，服务组的成员将收缩或扩展。