Regatta Data Ltd.

Emc Corporation

Emc IP Holding Company LLC

Irit Yadin-Lempel

Shahar Frank

Erez Webman

Renen Hallak

Kirill Shoikhet

Kobi Luz

Yaron Segev

Eran Borovik

Hilla Atzmon

A database system implementing a concurrency control protocol is provided. The database system includes a node connected through a network to a client; the node comprises: a storage for storing a plurality of data cells; one or more processors; and a memory, the memory containing instructions that, when executed by the one or more processors, configure the node to: receive at least one non-commit statement that is part of a transaction; execute locally tasks included in each of the at least one received statement in an optimistic manner allowing statements of other transactions to independently access same data cells in the database system being modified by tasks of the at least one received statement; and return the client an acknowledgment that the transaction is committed, the acknowledgment is returned upon validation of the transaction, wherein the transaction is validated in a pessimistic manner.

Concurrency control protocol for local database systems

A method and system for managing execution of database transactions by facilitating point-in-time image (PIT). The method comprises receiving at least one statement being part of a transaction, the transaction is initiated by a client to be executed on a distributed database system; sending a single request to a sequencer server (SEQ-server) to create at least one PiT, wherein the SEQ-server provides a logical timestamp counter (LTC) value as a timestamp of the PiT; upon creation of the at least one PiT, causing execution of the at least one statement, a PiT provides a state and content of committed data in the distributed database system; upon receiving a commit statement, performing a commitment process of the transaction, the commitment process is based on a commitment timestamp (CMTS) set by the SEQ-server based on an incremented value of the LTC; and returning an acknowledgment of the transaction commitment to the client.

Mechanisms for efficient point-in-time creation and maintenance in a distributed database

A method and system for managing execution of database transactions are provided. The method includes receiving at least one statement that is a part of a transaction, wherein the transaction is initiated by a client to be executed on a database system; executing tasks included in each of the at least one received statement in an optimistic manner, wherein the received at least one statement is not a commit statement; and returning the client an acknowledgement that the transaction is committed, wherein the acknowledgement is returned upon validation of the transaction, wherein the transaction is validated in a pessimistic manner, and wherein the at least one received statement is a commit statement.

Concurrency control protocol and system thereof

A memory management system for a thinly provisioned memory volume in which a relatively larger virtual address range of virtual address blocks is mapped to a relatively smaller physical memory comprising physical memory blocks via a mapping table containing entries only for addresses of the physical memory blocks containing data. The memory management system comprises a snapshot provision unit to take a given snapshot of the memory volume at a given time, the snapshot comprising a mapping table and memory values of the volume, the mapping table and memory values comprising entries only for addresses of the physical memory containing data. The snapshot is managed on the same thin provisioning basis as the volume itself, and the system is particularly suitable for RAM type memory disks.

Snapshot mechanism

A device for scalable block data storage and retrieval uses content addressing. Data storage devices store data blocks, and are connected over a network to computing modules. The modules comprise control modules and data modules and carry out content addressing for both storage and retrieval. The network defines separate control paths via the control modules and data paths via the data modules.

Growing community of inventors

Caesarea, Israel

Irit Yadin-Lempel