Symantec Operating Corporation

Microsoft Technology Licensing, LLC

Symantec Corporation

Veritas Technologies LLC

Veritas Operating Corporation

Nutanix, Inc.

Symantec Operating Corporating

Angshuman Bezbaruah

Ankur P Panchbudhe

Anand A Kekre

Niranjan Sanjiv Pendharkar

Lars Reuther

Vivek V Gupta

John Andrew Starks

Taylor O'Neil Brown

Chirag Deepak Dalal

Milind Vithal Borate

Shailesh Marathe

Christopher Leland Eck

Basant Rajan

John Colgrove

Ronald S Karr

David Allen Dion

Srineet Sridharan

Lokesh Srinivas Koppolu

Pradip Kulkarni

Jonathan Fischer

Sergey Dmitriyevich Meshcheryakov

Rajesh Dave

Ashwani Mujoo

Steven Ekren

Subhojit Roy

Oleg Kiselev

Craig Harmer

Rahul M Fiske

Pranab Patnaik

Raghu Krishnamurthy

John A Muth

Michael E Root

Kiran Tatiparthi

Vikas Gupta

Amitava Guha

Veeral P Shah

Prabhat Kumar Singh

Mayur Vijay Sadavarte

Aditya Anil Gokhale

Kedar M Karmarkar

Praveen Kumar Padia

Bharath Kumar Beedu

Ashish Agarwal

Dinesh Jotwani

Howard Hao

Neils S Van Ingen

Kati Rader

Niels S Van Ingen

Soumya Kanti Das Bhaumik

Hasan Serdar Sutay

A system and method for capturing high frequency snapshots of an entity includes creating, by a storage sub-system associated with a distributed storage system of a virtualized environment, a cached configuration of an entity within the storage sub-system, capturing, by the storage sub-system, a snapshot of the entity from the cached configuration based on a schedule of a snapshot policy, including sending, by the storage sub-system, the snapshot to a repository indicated in the snapshot policy, and determining, by the storage sub-system, that a configuration file associated with the entity has been updated. The system and method also includes updating, by the storage sub-system, the cached configuration based upon the configuration file that has been updated.

System and method for creating high frequency snapshots of an entity in a virtualized environment

A computer system maintains identifiers that identify changed blocks of virtual machine (VM) storage. The computer system accesses a stable VM checkpoint comprising a restorable VM image at a time, and that stores a representation of data of at least one block as it existed at the time. The computer system converts the checkpoint to a reference point. Reference point information is transferable with the VM, such that if the VM is moved to a different computing system, any data identified by the reference point is recoverable. The conversion includes querying the storage to determine an identifier corresponding to the block of the checkpoint at the time, storing this identifier as a part of the reference point, and releasing the representation of the data of the block from the checkpoint. The computer system then uses the reference point to identify changes in the blocks of the storage since the time.

Efficiently providing virtual machine reference points

Embodiments are directed to backing up a virtual machine cluster and to determining virtual machine node ownership prior to backing up a virtual machine cluster. In one scenario, a computer system determines which virtual machines nodes are part of the virtual machine cluster, determines which shared storage resources are part of the virtual machine cluster and determines which virtual machine nodes own the shared storage resources. The computer system then indicates to the virtual machine node owners that at least one specified application is to be quiesced over the nodes of the virtual machine cluster, such that a consistent, cluster-wide checkpoint can be created. The computer system further creates a cluster-wide checkpoint which includes a checkpoint for each virtual machine in the virtual machine cluster.

Snapshotting shared disk resources for checkpointing a virtual machine cluster

A method and system for incremental backup is disclosed. The method includes writing a first update to a secondary node and writing a second update to the secondary node. The secondary node comprises a replication storage group (RSG). Further, the order in which the updates are written at the secondary node is consistent with the order in which the updates were written at a primary node.

Method and system for incremental backup of data volumes

The writing of data to a storage system such that change tracking is efficiently performed. If a portion is to be written to the storage system, the system writes a write record indicating that a group of portions (that includes the particular portion) of the storage system is to be written to the storage system. This is represented even though those other portions are not being contemporaneously written to the storage system, and may in fact never be written. The particular portion is then written to the storage system. At some point thereafter, perhaps in the background, a change tracking structure is changed to reflect that the particular portion is written to the storage system, but without reflecting writes of all of the group of portions. The write record may then be invalidated. This reduces latency in systems that track changes with small cost at the time of backup.

Using an overinclusive write record to track and write changes to a storage system

A method, system and computer-readable medium for providing rapid failback of a computer system is described. The method, which operates during failback of a secondary computer to a primary computer, accesses a map to determine a location of a latest version of data corresponding to a read request, where the location may be within either a primary data storage or a secondary data storage. The system comprises a primary computer coupled to a primary data storage and a secondary computer coupled to a secondary data storage. The primary computer maintains a write log and the secondary computer maintains a map. The computer-readable medium contains instructions, which, when executed by a processor, performs the steps embodied by the method.

Method and system for rapid failback of a computer system in a disaster recovery environment

Tracking changes amongst unit portions (e.g., blocks or files) of a storage system. A logical time identifier is associated with each unit portion and is included within a logical time identifier structure. When writing to a particular write portion, the mechanism updates the appropriate logical time identifiers, calculates redundancy data of a group of one or more logical time identifiers associated with the unit portion(s) of the write portion. Furthermore, the write portion of the storage system is written. In addition, the corresponding redundancy data for that write portion is written to the logical time identifier structure. Later, for a given write portion, the redundancy data is verified to be consistent or inconsistent with the group of one or more logical time identifiers associated with the write portion. If the redundancy data is not consistent, then a current logical time identifier is assigned to each of the logical time identifiers.

Change tracking using redundancy in logical time

Embodiments are directed to establishing efficient virtual machine reference points and to specifying a virtual machine reference point to query incremental changes. In one scenario, a computer system accesses a stable virtual machine checkpoint that includes portions of underlying data stored in data storage, where the checkpoint is associated with a specific point in time. The computer system then queries the data storage to determine data storage identifiers that reference the point in time associated with the checkpoint and stores the determined data storage identifiers as a virtual machine reference point, where each subsequent change to the data storage results in an update to the data storage identifier, so that virtual machine reference point is usable to identify incremental changes from specific points in time on.

Virtual machine cluster backup in a multi-node environment

A method and apparatus for automatically archiving data items from backup storage without having to first restore the data items is provided. In one embodiment, the method comprises processing at least one data item in backup storage using a mapping, wherein the mapping indicates at least one location of the at least one data item and ingesting the at least one data item into an archive database.

Method and apparatus for automatically archiving data items from backup storage

A health monitoring technique monitors the health and performance of applications executing in a guest partition in a virtualized environment. In an embodiment, a guest integration component interacts with an application through an application programming interface in order for the virtualization platform to monitor the health and performance of the application. In another embodiment, the guest integration component may include a monitoring agent that accesses an event log and/or a performance monitor log to access the health and performance of the application. The health and performance of the application may then be analyzed by the virtualization platform to determine an appropriate remedial action.

Health monitoring of applications in a guest partition

A method and apparatus for preventing data leakage of e-discovery data items is provided. In one embodiment, the method for automatically configuring e-discovery data for data leakage prevention includes processing filtering information regarding at least one e-discovery data item that is selected for data leakage prevention and generating data leakage prevention information for the selected at least one e-discovery data item, wherein the data leakage prevention information is used to filter the at least one data item.

Method and apparatus for preventing data leakage of e-discovery data items

A record of changes to virtual machine data of a virtual machine and a record of changes to snapshots of the virtual machine that have been received since the virtual machine was last backed up are maintained. In response to it being time to perform an incremental backup of the virtual machine, a portion of the virtual machine data is backed up based on the record of changes to the virtual machine data, and a portion of the snapshots is backed up based on the record of changes to the snapshots. In response to it being time to migrate the virtual machine to a second host device, the virtual machine data, the record of changes to the virtual machine data, the record of changes to the snapshots, and one or more of the snapshots are migrated to the second host device.

Incremental virtual machine backup supporting migration

A method and apparatus for maintaining data consistency in a virtualized application during software update installation. In one embodiment, the method includes processing software update data associated with a software update installation for a virtualized application, wherein the virtualized application comprises at least one of read-only data or read-write data and coupling the software update data with the at least one of a read-only data or a read-write data, wherein the software update data overrides the at least one of read-only data or read-write data.

Method and apparatus for maintaining data consistency in a virtualized application during software update installation

Various methods and systems for performing cascaded replication are disclosed. For example, one method involves receiving an acknowledgment at a primary replication site from an intermediate replication site. The acknowledgment identifies whether a change has been applied to a remote replication site. The method also involves updating a journal, in response to the acknowledgment. The journal identifies whether the change is currently being replicated. The method can also involve detecting that the intermediate replication site is inaccessible. In response, the method synchronizes a copy of application data at the remote replication site by applying one or more changes identified in the journal to the copy of the application data at the remote replication site.

Cascaded replication system with remote site resynchronization after intermediate site failure

Growing community of inventors

Pune, India

Angshuman Bezbaruah