Emc IP Holding Company LLC

Sergey Koyushev

Mikhail Danilov

Ivan Tchoub

Maxim S Trusov

Nikita Gutsalov

Alexander Fedorov

Konstantin Buinov

Gregory Skripko

Maria Gavrilova

Andrey Fomin

Kirill Viktorovich Gusakov

Sergey Karpenkov

A transformation service is provided for a plurality of transformation jobs associated with one or more storage containers. A single transformation user runs enumeration tasks associated with data stored in the one or more storage containers. When two or more of the plurality of transformation jobs are active during a time interval, the single transformation user runs an enumeration task for all of the active transformation jobs during said time interval.

System and method for parallel storage transformation

A computer program product, system, and method for determining containers, within a secondary storage, to transform; determining users having access to the containers to transform; synchronizing storage configuration between the secondary storage and a primary storage; enumerating objects within the containers to transform; and adding object identifiers and object metadata for the enumerated objects to an object index within the primary storage.

Transformation processing for objects between storage systems

A computer program product, system, and method for determining a list of objects, within source storage, to migrate; generating a chunk layout for the objects to migrate; and for each unencoded chunk within the chunk layout: retrieving objects from source storage specified by the unencoded chunk within the chunk layout; generating data and coded fragments for the unencoded chunk using the retrieved objects; and storing the data and coded fragments to primary storage.

Efficient migration to distributed storage

A method for avoiding recovery and storage of useless data is disclosed. The operations comprise: determining that a subset of data fragments out of a plurality of data fragments have become unavailable, the plurality of data fragments forming a data chunk, wherein the plurality of data fragments are protected by additional redundancy data; determining whether all of data that were stored in the unavailable subset of data fragments when the unavailable subset of data fragments were available would be useless if recovered using remaining available data fragments of the data chunk and the redundancy data; and in response to determining that all of the data that were stored in the unavailable subset of data fragments would be useless if recovered, generating new redundancy data for protecting the remaining available data fragments of the data chunk without recovering the data that were stored in the unavailable subset of data fragments.

Content-aware data recovery method for elastic cloud storage

A technique to accelerate Galois Field (GF) arithmetic. The technique, which does not rely on any specific processor instruction set, can be used to accelerate erasure coding within storage systems.

Accelerated Galois field coding for storage systems

The disclosure relates data protection management (e.g. data re-protection) for distributed storage systems. Specifically, the systems (and methods) of the disclosure implement erasure coding to protect replicated data efficiently while reducing the storage capacity overhead. Traditional approaches for data re-protection that implement erasure coding often require performing a complete re-encoding to reflect changes in data (e.g. a removal of data). The disclosure provides an improved mechanism for data re-protection by implementing an efficient re-encoding (or un-encoding) process that reduces the requirements for data reads and operations, and thus, reduces the resource requirements for data re-protection.

Growing community of inventors

Saint Petersburg, Russia

Sergey Koyushev