Vmware, Inc.

Symantec Corporation

Symantec Operating Corporation

Symantec Operating System

Ron Passerini

Keith Farkas

Sridhar Rajagopal

Michael Nelson

Elisha Ziskind

Joanne Ren

Guoqiang Shu

Michael T Rowan

Kevin Rodgers

John F Kilroy

Diane Delgado

Robert Warren Perry

Jeff Darcy

Jeff Moroski

Tianming Zhang

Robert A Perry

Michael Rowan

An example method for assigning rights to utilize cloud resources associated with a service provider's computing hardware is provided. The example method can include defining a rights package including multiple rights pertaining to utilization of the cloud resources. The rights package can be assigned across multiple tenants of the service provider. The example method can also include defining a global role that includes potential rights, where the global role is assignable to individual tenant users of the tenant. The global roles can be made available to multiple tenants using the service provider. The method can further include provisioning filtered rights to utilize the cloud resources to a tenant user of the tenant, the tenant user being assigned the global role. The filtered rights can include rights present in both the potential rights defined for the global role and the rights defined for the rights package.

Flexible rights management for cloud-based access to computing resources

Embodiments maintain high availability of software application instances in a fault domain. Subordinate hosts are monitored by a master host. The subordinate hosts publish heartbeats via a network and datastores. Based at least in part on the published heartbeats, the master host determines the status of each subordinate host, distinguishing between subordinate hosts that are entirely inoperative and subordinate hosts that are operative but partitioned (e.g., unreachable via the network). The master host may restart software application instances, such as virtual machines, that are executed by inoperative subordinate hosts or that cease executing on partitioned subordinate hosts.

Maintaining high availability of a group of virtual machines using heartbeat messages

A storage management device records write requests that are directed to a data store. In one embodiment, the storage management device records a plurality of write request entries, each one of which includes information relating to a write request, in at least one first database table, and maintains, for each first database table, at least one record in a second database table. The one or more records in the second database table include data representing the effects of the write requests on a state of at least one portion of the data store. In one such embodiment, each time that one write request entry is recorded in one first database table, the storage management device updates at least one record in the second database table.

Methods and apparatus for recording write requests directed to a data store

A method, apparatus, and system for accessing units of storage in at least one logical unit by processing I/O requests directed to the logical units using a LUN queue and an operation-type queue. By using the queues to process the I/O requests, the requests can be processed without address collisions.

Systems, apparatus, and methods for processing I/O requests

The disclosed technology can be used to develop systems and perform methods that receive and process I/O requests directed to at least a part of a logical unit of storage. The I/O requests can be associated with different times corresponding to when such I/O requests were received. Nodes that include non-overlapping address ranges associated with the logical unit of storage can be formed in response to receiving the I/O requests and such nodes can be subsequently organized into a tree data structure. The tree data structure can serve as a basis for determining address overlap, for example to enable processing a first operation associated with a first one of the I/O requests in accordance with the first I/O request's receipt time, while one or more other operations associated with a different I/O request may be processed irrespective of that different I/O request's receipt time. This can be useful in a system in system operations are improved by easy access to information about whether pending I/O requests are directed to overlapping units of storage.

Processing storage-related I/O requests using binary tree data structures

The invention relates to systems, methods, and articles of manufacture for generating an image of a data store at a past time by using a map (e.g., a time map) of the locations of data stored in the data store at the specified past time. The map allows the data storage system to quickly determine the locations of data stored in a data store at a past time, without searching the entire index of records concerning the locations of the past data.

Generation and use of a time map for accessing a prior image of a storage device

Growing community of inventors

Somerville, MA, United States of America

Ron Passerini