Vmware, Inc.

Emc IP Holding Company LLC

Zhou Huang

Hong Li

Jin Feng

Jian Zhao

Zhaohui Guo

Haitao Zhou

Honglei Cong

Wenguang Wang

Xinyu Zhang

Christos Karamanolis

He Wang

Ning Xu

Yue Qian

Mark Yue Qian

Jiushi Wan

Yizheng Chen

Aditya Kotwal

Ryan Menglei Liang

Uwe Wienand

Mei Zhao

RunQing Li

An adaptive idle detection method determines whether software defined data centers (SDDCs) in a hyperconverged infrastructure (HCI) environment are idle. Idleness may be quantified via a coefficient of variation (CV) against resource usage, so as to adapt the idle detection method to SDDCs with different hardware specifications and workloads. Management overhead may also be filtered out by the idle detection method, and the idle detection method may use idleness scores to further reduce overhead.

Adaptive idle detection in a software-defined data center in a hyper-converged infrastructure

A method is provided for a hyper-converged storage-compute system to implement an active-active failover architecture for providing Internet Small Computer System Interface (iSCSI) target service. The method intelligently selects multiple hosts to become storage nodes that process iSCSI input/output (I/O) for a target. The method further enables iSCSI persistent reservation (PR) to handle iSCSI I/Os from multiple initiators.

Active-active architecture for distributed ISCSI target in hyper-converged storage

One example method to perform object-based load balancing in a distributed storage system of a virtualization system supported by a cluster of host machines may include determining, by a first host machine in the cluster, whether any host machine in the cluster has affinity to a site. The method may also include determining, by the first host machine, whether to distribute affinity Internet small computer system interface (iSCSI) targets owned by the first host machine to at least the second machine based on a first balance objective associated with the site, and after having considered the first balance objective, determining, by the first host machine, whether to distribute iSCSI targets without affinity owned by the first host machine to other host machines in the cluster based on a second balance objective associated with the cluster.

Object-based load balancing approaches in distributed storage system

One example method to support Internet small computer system interface (iSCSI) services in a distributed storage system of a virtualization system may include receiving a notification of a change event associated with a global virtual Internet Protocol (VIP) object, wherein the global VIP object is associated with a virtual IP address for the iSCSI services. The method may also include in response to a first determination that the first host machine does not own the global VIP object and in response to a second determination that the first host machine gains ownership of the global VIP object based on the notification, locking the global VIP object and binding the virtual IP address to the first host machine.

Object-based approaches to support internet small computer system interface (ISCSI) services in distributed storage system

Example methods are provided for performing fast building and testing a software suite with multiple software components. In one example, the method may include obtaining a changed code file, identifying a software component of the software suite impacted by the changed code file, and instructing to generate a software component build based on the software component but excluding other software components of the software suite. Before completing generating the software component build, the method may also include selecting a software suite build. The method further includes instructing to prepare a testbed based on the software suite build and instructing to test the software component build on the testbed.

Method and system for fast building and testing software

Certain Embodiments described herein relate to configuring the network-storage stack of two devices (e.g., physical or virtual) communicating together (e.g., an initiator and a target, as defined below) with Internet Small Computer Systems Interface (iSCSI) extension for remote direct memory access (RDMA) iSER, which is a protocol designed to utilize RDMA to accelerate iSCSI data transfer. The iSER protocol is implemented as an iSER datamover layer that acts as an interface between an iSCSI layer and an RDMA layer of the network-storage stacks of the two devices. Using iSER in conjunction with RDMA allows for bypassing the existing traditional network protocol layers (e.g., TCP/IP protocol layers) of the devices and permits data to be transferred directly, between the two devices, using certain memory buffers, thereby avoiding memory copies taking place when the existing network protocol layers are used.

Internet small computer interface systems extension for remote direct memory access (RDMA) for distributed hyper-converged storage systems

The disclosure herein describes enabling use of a logical unit for data storage in a distributed storage system using a plurality of backend data objects. Based on receiving instructions to create a logical unit of a logical unit size, a target backend object size to be used with the logical unit is determined, and a plurality of backend objects for allocation to the logical unit is calculated. The backend objects are allocated to the logical unit and a metadata mapping associated with the logical unit is generated. The metadata mapping associates logical block addresses of the logical unit to the allocated backend objects. The logical unit is linked with the metadata mapping in an input/output (I/O) service and, based on the linked metadata mapping, I/O traffic is routed to and from the logical unit. Using multiple backend objects enhances flexibility and efficiency of data storage on the distributed storage system.

Routing traffic of a logical unit to multiple backend data objects based on metadata mapping

A given host machine in a virtualization system having a virtual distributed storage system may receive an iSCSI protocol packet from a computer system separate from the given host machine. Processing the iSCSI protocol may include accessing distributed storage device (iSCSI target) comprising storage connected to the two or more host machines in the virtualization system. The given host machine may generate an outbound iSCSI protocol packet comprising return data received from the target and send the outbound iSCSI protocol packet to the computer system.

Distributed iSCSI target for distributed hyper-converged storage

Various embodiments of the present disclosure provide a method for presenting a storage cluster status, comprising: in response to a request for monitoring a first target node in a storage cluster, monitoring whether a configuration status of the first target node is changed; and in response to the configuration status of the first target node being changed, presenting changed configuration status information of the first target node to the user.

Method and apparatus for presenting status of storage cluster

A storage system failure detection and failover application includes a command execution engine that loads and interprets both user-defined storage system management functions, and vendor-defined storage system management functions. The user-defined storage system management functions allow the system to detect and handle failure conditions indicating both the current state of an active storage system, and the current state of one or more applications that consume a storage service or services provided by the active storage system. The user-defined storage management functions also allow the system to perform failover processing in a way that allows applications to perform application-specific processing during storage system failover.

Growing community of inventors

Shanghai, China

Zhou Huang