Emc IP Holding Company LLC

Netapp, Inc.

Lior Oded Bahat

Erez Webman

Dvir Koren

Helen S Raizen

Mark A O'Connell

Zeev Shusterman

Evgeny Katz

Brad Bowlin

Orly Devor

Gil Ben Zeev

Tamir Segev

Eran Borovik

Nir Brifman

Boaz Palgi

Itai Rosenblatt

Ofer Elrom

Techniques are provided for scheduling storage volume migrations based on storage volume priorities and specified constraints. One method comprises generating a migratable volume list indicating storage volumes that can be migrated by evaluating available storage volumes according to an assigned priority and adding a storage volume to the migratable volume list in response to one or more constraints being satisfied that limit a migration of one or more of the storage volumes; and scheduling a migration of a volume part of a given storage volume from the migratable volume list based at least in part on a reevaluation of one or more of the constraints. The migratable volume list can be sorted by the assigned priority for each of the storage volumes. The migratable volume list can be regenerated in response to an event occurring that modifies the migratable volume list.

Storage volume migration scheduling based on storage volume priorities and specified constraints

In one aspect, a method includes storing data in a distributed storage environment that includes data servers and configuring each data server to mark a respective bit map for each block of data changed. In another aspect, an apparatus includes electronic hardware circuitry configured to store data in a distributed storage environment that includes data servers and to configure each data server to mark a respective bit map for each block of data changed. In a further aspect, an article includes a non-transitory computer-readable medium that stores computer-executable instructions. The instructions cause a machine to store data in a distributed storage environment that includes data servers and configure each data server to mark a respective bit map for each block of data changed. In each of the aspects above each data server is configured to handle a respective portion of a logical unit.

Incremental backup in a distributed block storage environment

A method of managing a distributed storage space. The method comprises mapping a plurality of replica sets to a plurality of storage managing modules installed in a plurality of computing units, each of the plurality of storage managing modules manages access of at least one storage consumer application to replica data of at least one replica of a replica set from the plurality of replica sets, the replica data is stored in at least one drive of a respective the computing unit, allocating at least one time based credit to at least one of each storage managing module and the replica data, iteratively renewing the time based credit as long a failure of at least one of the storage managing module, and the at least one drive and the replica data is not detected plurality of storage managing.

Methods and systems of managing a distributed replica based storage

A software upgrade tool and procedure provide uninterrupted operation of a replication system during an upgrade of software components of the system. The replication system includes one or more user systems coupled to one or more target storage systems over a communications network, such as a computer network. Illustratively, each user system is embodied as a replication client, while each target storage system is embodied as a replication server. In addition, the replication system includes a management system embodied as a management server that manages configuration of the system, including during upgrade of the software components of the replication system. To that end, the software upgrade tool cooperates with the management server to query the configuration of 'old' versions of the software components and to manage upgrades of those components to 'new' versions of software. According to the invention, the upgrade tool and procedure enable both the old and new versions of the software components to run concurrently on the replication client and replication server, as well as the management server.

System and method for providing uninterrupted operation of a replication system during a software upgrade

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Kerem Maharal, Israel

Lior Oded Bahat