Patents by Inventor Sreeram Iyer
Sreeram Iyer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11909612Abstract: Some embodiments provide a novel method of performing health monitoring for resources associated with a global server load balancing (GSLB) system. This system is implemented by several domain name system (DNS) servers that perform DNS services for resources located at several geographically separate sites. The method identifies several different groupings of the resources. It then assigns the health monitoring of the different resource groups to different DNS servers. The method then configures each particular DNS server (1) to send health monitoring messages to the particular group of resources assigned to the particular DNS server, (2) to generate data by analyzing responses to the sent health monitoring messages, and (3) to distribute the generated data to the other DNS servers. The method in some embodiments is performed by a set of one or more controllers.Type: GrantFiled: January 28, 2023Date of Patent: February 20, 2024Assignee: VMware LLCInventors: Murali Basavaiah, Anand Parthasarathy, Sreeram Iyer, Sambit Kumar Das, Narasimhan Gomatam Mandeyam
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Publication number: 20240022598Abstract: Some embodiments provide a two-tier DNS (Domain Name System) service for processing DNS requests. In some embodiments, the two-tier DNS service deploys first and second tiers of service machines, with the second-tier having several groups of service machines each of which is configured to resolve DNS requests for a different set of domain names than the other second-tier group(s). Each service machine in the first-tier is configured to identify the second-tier group responsible for each particular DNS request that the service machine receives for each particular domain name, and to forward the particular DNS request to the second-tier group that it identifies for the particular DNS request. The first-tier DNS service in some embodiments has only one group of service machines. Each first or second service machine group in some embodiments can have one or more service machines, and can be scaled up or down to add or remove service machines to the group (e.g., through an active/active layer 3 scaleout with BGP).Type: ApplicationFiled: June 19, 2023Publication date: January 18, 2024Inventors: Sreeram Iyer, Murali Basavaiah, Prasad Rao, Shyam Prasad Anisetti, Naveen Dhillon
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Publication number: 20240022538Abstract: Some embodiments provide a two-tier DNS (Domain Name System) service for processing DNS requests. In some embodiments, the two-tier DNS service deploys first and second tiers of service machines, with the second-tier having several groups of service machines each of which is configured to resolve DNS requests for a different set of domain names than the other second-tier group(s). Each service machine in the first-tier is configured to identify the second-tier group responsible for each particular DNS request that the service machine receives for each particular domain name, and to forward the particular DNS request to the second-tier group that it identifies for the particular DNS request. The first-tier DNS service in some embodiments has only one group of service machines. Each first or second service machine group in some embodiments can have one or more service machines, and can be scaled up or down to add or remove service machines to the group (e.g., through an active/active layer 3 scaleout with BGP).Type: ApplicationFiled: June 19, 2023Publication date: January 18, 2024Inventors: Sreeram Iyer, Murali Basavaiah, Prasad Rao, Shyam Prasad Anisetti, Naveen Dhillon
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Publication number: 20240022539Abstract: Some embodiments provide a two-tier DNS (Domain Name System) service for processing DNS requests. In some embodiments, the two-tier DNS service deploys first and second tiers of service machines, with the second-tier having several groups of service machines each of which is configured to resolve DNS requests for a different set of domain names than the other second-tier group(s). Each service machine in the first-tier is configured to identify the second-tier group responsible for each particular DNS request that the service machine receives for each particular domain name, and to forward the particular DNS request to the second-tier group that it identifies for the particular DNS request. The first-tier DNS service in some embodiments has only one group of service machines. Each first or second service machine group in some embodiments can have one or more service machines, and can be scaled up or down to add or remove service machines to the group (e.g., through an active/active layer 3 scaleout with BGP).Type: ApplicationFiled: June 19, 2023Publication date: January 18, 2024Inventors: Sreeram Iyer, Murali Basavaiah, Prasad Rao, Shyam Prasad Anisetti, Naveen Dhillon
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Publication number: 20240015133Abstract: Some embodiments provide a method that, at a first domain name system (DNS) cluster of a set of DNS clusters, receives a DNS request from a client. The first DNS cluster identifies, based on an identifier of the client in the DNS request, a home DNS cluster of the client. The method forwards the DNS request to the home DNS cluster. The home DNS cluster supplies a DNS response to the client. Identifying the home DNS cluster, in some embodiments, includes performing a hash on the identifier of the client. Supplying the DNS response, in some embodiments, includes receiving a virtual IP (VIP) address associated with one of a plurality of sets of application servers to the client and providing the received VIP address to the client in the DNS response.Type: ApplicationFiled: September 22, 2023Publication date: January 11, 2024Inventors: Sudarshana Kandachar Sridhara Rao, Rajagopal Sreenivasan, Raghav Kempanna, Sreeram Iyer
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Publication number: 20230403319Abstract: Some embodiments provide a method of implementing capacity-aware load balancing across a set of data compute nodes (DCNs) by reducing latency for the set of DCNs. From the set of DCNs, the method identifies (1) a first subset of DCNs including DCNs that have a latency that is higher than an average latency computed for the set of DCNs and (2) a second subset of DCNs including DCNs that have a latency that is lower than the average latency computed for the set of DCNs. For each DCN in the first subset of DCNs, the method assigns to the DCN a weight value that corresponds to a target latency computed for the set of DCNs. Based on the assigned weight values for the first subset of DCNs, the method computes an excess weight value to be redistributed across the second subset of DCNs. The method redistributes the computed excess weight value across the second subset of DCNs.Type: ApplicationFiled: July 28, 2023Publication date: December 14, 2023Inventors: Sachin Pandey, Rohan Gandhi, Sreeram Iyer, Santosh Pallagatti Kotrabasappa, Sairam Veeraswamy
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Patent number: 11799824Abstract: Some embodiments provide a method that, at a first domain name system (DNS) cluster of a set of DNS clusters, receives a DNS request from a client. The first DNS cluster identifies, based on an identifier of the client in the DNS request, a home DNS cluster of the client. The method forwards the DNS request to the home DNS cluster. The home DNS cluster supplies a DNS response to the client. Identifying the home DNS cluster, in some embodiments, includes performing a hash on the identifier of the client. Supplying the DNS response, in some embodiments, includes receiving a virtual IP (VIP) address associated with one of a plurality of sets of application servers to the client and providing the received VIP address to the client in the DNS response.Type: GrantFiled: June 10, 2022Date of Patent: October 24, 2023Assignee: VMWARE, INC.Inventors: Sudarshana Kandachar Sridhara Rao, Rajagopal Sreenivasan, Raghav Kempanna, Sreeram Iyer
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Patent number: 11792155Abstract: Some embodiments provide a method that, at a first domain name system (DNS) cluster of a set of DNS clusters, receives a DNS request from a client. The first DNS cluster identifies, based on an identifier of the client in the DNS request, a home DNS cluster of the client. The method forwards the DNS request to the home DNS cluster. The home DNS cluster supplies a DNS response to the client. Identifying the home DNS cluster, in some embodiments, includes performing a hash on the identifier of the client. Supplying the DNS response, in some embodiments, includes receiving a virtual IP (VIP) address associated with one of a plurality of sets of application servers to the client and providing the received VIP address to the client in the DNS response.Type: GrantFiled: June 10, 2022Date of Patent: October 17, 2023Assignee: VMWARE, INC.Inventors: Sudarshana Kandachar Sridhara Rao, Rajagopal Sreenivasan, Raghav Kempanna, Sreeram Iyer
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Patent number: 11757983Abstract: Some embodiments provide a method of implementing capacity-aware load balancing across a set of data compute nodes (DCNs) by reducing latency for the set of DCNs. From the set of DCNs, the method identifies (1) a first subset of DCNs including DCNs that have a latency that is higher than an average latency computed for the set of DCNs and (2) a second subset of DCNs including DCNs that have a latency that is lower than the average latency computed for the set of DCNs. For each DCN in the first subset of DCNs, the method assigns to the DCN a weight value that corresponds to a target latency computed for the set of DCNs. Based on the assigned weight values for the first subset of DCNs, the method computes an excess weight value to be redistributed across the second subset of DCNs. The method redistributes the computed excess weight value across the second subset of DCNs.Type: GrantFiled: May 17, 2022Date of Patent: September 12, 2023Assignee: VMWARE, INC.Inventors: Sachin Pandey, Rohan Gandhi, Sreeram Iyer, Santosh Pallagatti Kotrabasappa, Sairam Veeraswamy
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Publication number: 20230171171Abstract: Some embodiments provide a novel method of performing health monitoring for resources associated with a global server load balancing (GSLB) system. This system is implemented by several domain name system (DNS) servers that perform DNS services for resources located at several geographically separate sites. The method identifies several different groupings of the resources. It then assigns the health monitoring of the different resource groups to different DNS servers. The method then configures each particular DNS server (1) to send health monitoring messages to the particular group of resources assigned to the particular DNS server, (2) to generate data by analyzing responses to the sent health monitoring messages, and (3) to distribute the generated data to the other DNS servers. The method in some embodiments is performed by a set of one or more controllers.Type: ApplicationFiled: January 28, 2023Publication date: June 1, 2023Inventors: Murali Basavaiah, Anand Parthasarathy, Sreeram Iyer, Sambit Kumar Das, Narasimhan Gomatam Mandeyam
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Patent number: 11582120Abstract: Some embodiments provide a novel method of performing health monitoring for resources associated with a global server load balancing (GSLB) system. This system is implemented by several domain name system (DNS) servers that perform DNS services for resources located at several geographically separate sites. The method identifies several different groupings of the resources. It then assigns the health monitoring of the different resource groups to different DNS servers. The method then configures each particular DNS server (1) to send health monitoring messages to the particular group of resources assigned to the particular DNS server, (2) to generate data by analyzing responses to the sent health monitoring messages, and (3) to distribute the generated data to the other DNS servers. The method in some embodiments is performed by a set of one or more controllers.Type: GrantFiled: January 17, 2020Date of Patent: February 14, 2023Assignee: VMWARE, INC.Inventors: Murali Basavaiah, Anand Parthasarathy, Sreeram Iyer, Sambit Kumar Das, Narasimhan Gomatam Mandeyam
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Publication number: 20220400098Abstract: Some embodiments provide a method that, at a first domain name system (DNS) cluster of a set of DNS clusters, receives a DNS request from a client. The first DNS cluster identifies, based on an identifier of the client in the DNS request, a home DNS cluster of the client. The method forwards the DNS request to the home DNS cluster. The home DNS cluster supplies a DNS response to the client. Identifying the home DNS cluster, in some embodiments, includes performing a hash on the identifier of the client. Supplying the DNS response, in some embodiments, includes receiving a virtual IP (VIP) address associated with one of a plurality of sets of application servers to the client and providing the received VIP address to the client in the DNS response.Type: ApplicationFiled: June 10, 2022Publication date: December 15, 2022Inventors: Sudarshana Kandachar Sridhara Rao, Rajagopal Sreenivasan, Raghav Kempanna, Sreeram Iyer
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Publication number: 20220400097Abstract: Some embodiments provide a method that, at a first domain name system (DNS) cluster of a set of DNS clusters, receives a DNS request from a client. The first DNS cluster identifies, based on an identifier of the client in the DNS request, a home DNS cluster of the client. The method forwards the DNS request to the home DNS cluster. The home DNS cluster supplies a DNS response to the client. Identifying the home DNS cluster, in some embodiments, includes performing a hash on the identifier of the client. Supplying the DNS response, in some embodiments, includes receiving a virtual IP (VIP) address associated with one of a plurality of sets of application servers to the client and providing the received VIP address to the client in the DNS response.Type: ApplicationFiled: June 10, 2022Publication date: December 15, 2022Inventors: Sudarshana Kandachar Sridhara Rao, Rajagopal Sreenivasan, Raghav Kempanna, Sreeram Iyer
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Patent number: 11477274Abstract: Example methods and systems for capability-aware service request distribution are described. In one example, a network element may obtain a set of capability information associated with multiple load balancers capable of service request handling and identify varying capability levels among the multiple load balancers. The network element may assign unequal path cost information to the multiple load balancers to indicate the varying capability levels. The unequal path cost information may include (a) a first path cost that is assigned to the first load balancer; and (b) a second path cost that is assigned to the second load balancer and different to the first path cost to indicate the lower capability level of the second load balancer compared to the first load balancer. In response to detecting a service request, the service request may be steered towards one of the multiple load balancers based on the unequal path cost information.Type: GrantFiled: January 6, 2021Date of Patent: October 18, 2022Assignee: VMWARE, INC.Inventors: Raghav Kempanna, Sreeram Iyer, Prasad Rao, Rajagopal Sreenivasan, Sudarshana Kandachar Sridhara Rao, Rakesh Kumar R
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Publication number: 20220291970Abstract: Core to resource and resource to core mapping is disclosed. In an embodiment, a method includes obtaining an input pattern including a plurality of resource identifiers corresponding to resources. The method further includes applying the input pattern to a guaranteed regular and uniform distribution process to obtain a distribution pattern that indicates a distribution of resources across cores or a distribution of the cores across the resources. The method further includes distributing the resources across the cores or distributing the cores across the resources according to the distribution pattern.Type: ApplicationFiled: May 30, 2022Publication date: September 15, 2022Inventors: Raju Kumar, Sreeram Iyer
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Publication number: 20220217202Abstract: Example methods and systems for capability-aware service request distribution are described. In one example, a network element may obtain a set of capability information associated with multiple load balancers capable of service request handling and identify varying capability levels among the multiple load balancers. The network element may assign unequal path cost information to the multiple load balancers to indicate the varying capability levels. The unequal path cost information may include (a) a first path cost that is assigned to the first load balancer; and (b) a second path cost that is assigned to the second load balancer and different to the first path cost to indicate the lower capability level of the second load balancer compared to the first load balancer. In response to detecting a service request, the service request may be steered towards one of the multiple load balancers based on the unequal path cost information.Type: ApplicationFiled: January 6, 2021Publication date: July 7, 2022Applicant: VMware, Inc.Inventors: Raghav KEMPANNA, Sreeram IYER, Prasad RAO, Rajagopal SREENIVASAN, Sudarshana KANDACHAR SRIDHARA RAO, Rakesh KUMAR R
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Patent number: 11347561Abstract: Core to resource and resource to core mapping is disclosed. In an embodiment, a method includes obtaining an input pattern including a plurality of resource identifiers corresponding to resources. The method further includes applying the input pattern to a guaranteed regular and uniform distribution process to obtain a distribution pattern that indicates a distribution of resources across cores or a distribution of the cores across the resources. The method further includes distributing the resources across the cores or distributing the cores across the resources according to the distribution pattern.Type: GrantFiled: June 22, 2018Date of Patent: May 31, 2022Assignee: VMWARE, INC.Inventors: Raju Kumar, Sreeram Iyer
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Patent number: 11290358Abstract: Some embodiments provide a novel method of performing health monitoring for resources associated with a global server load balancing (GSLB) system. This system is implemented by several domain name system (DNS) servers that perform DNS services for resources located at several geographically separate sites. The method identifies several different groupings of the resources. It then assigns the health monitoring of the different resource groups to different DNS servers. The method then configures each particular DNS server (1) to send health monitoring messages to the particular group of resources assigned to the particular DNS server, (2) to generate data by analyzing responses to the sent health monitoring messages, and (3) to distribute the generated data to the other DNS servers. The method in some embodiments is performed by a set of one or more controllers.Type: GrantFiled: January 17, 2020Date of Patent: March 29, 2022Assignee: VMWARE, INC.Inventors: Murali Basavaiah, Anand Parthasarathy, Sreeram Iyer, Sambit Kumar Das, Narasimhan Gomatam Mandeyam
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Patent number: 10931548Abstract: In an embodiment, a method includes selecting, among service engines (SEs) executing on a respective plurality of hosts, a set of one or more SEs to perform health monitoring of an application, where a plurality of instances of the application are executing on at least some of the hosts, and the selected SE(s) includes a subset of the SEs. The method includes collecting health monitor data from the selected SE(s), determining a health condition based at least in part on the collected data, and outputting the health condition. In another embodiment, a method includes receiving, at a first SE of a first host among a plurality of hosts, configuration information pertaining to a subset of application instances executing on corresponding ones of the plurality of hosts, obtaining health data pertaining to the subset of application instances, and outputting the health data to be shared by the plurality of hosts.Type: GrantFiled: March 8, 2017Date of Patent: February 23, 2021Assignee: VMWARE, INC.Inventors: Sreeram Iyer, Aditya Somasundara, Raju Kumar, Praveen Yalagandula
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Publication number: 20200382584Abstract: Some embodiments provide a novel method of performing health monitoring for resources associated with a global server load balancing (GSLB) system. This system is implemented by several domain name system (DNS) servers that perform DNS services for resources located at several geographically separate sites. The method identifies several different groupings of the resources. It then assigns the health monitoring of the different resource groups to different DNS servers. The method then configures each particular DNS server (1) to send health monitoring messages to the particular group of resources assigned to the particular DNS server, (2) to generate data by analyzing responses to the sent health monitoring messages, and (3) to distribute the generated data to the other DNS servers. The method in some embodiments is performed by a set of one or more controllers.Type: ApplicationFiled: January 17, 2020Publication date: December 3, 2020Inventors: Murali Basavaiah, Anand Parthasarathy, Sreeram Iyer, Sambit Kumar Das, Narasimhan Gomatam Mandeyam