Virtual Access Roll Data Protection Appliance

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Solution Overview

Problem

Conventional data protection systems face challenges in maintaining continuous data protection by keeping pace with high data transaction rates at production sites without slowing them down, leading to potential backlogs and system shutdowns.

Innovation Solution

A method and system that utilize a Data Protection Appliance (DPA) to create a virtual image of a point in time by taking storage array snapshots, enabling a hot pull session and exposing a Logical Unit Number (LUN) containing the point-in-time image, which allows for efficient data replication and recovery without interrupting production site operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If journaling is used to enable continuous data protection and rollback to any point in time, then data recovery flexibility is improved, but system overhead increases and may force production site shutdown at high transaction rates

Engineering Contradiction:
Improvedata recovery flexibilityVSAvoidsystem throughput
Core Design Contradiction:
Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent segments the backup system into multiple parallel backup units that can independently process different portions of data transactions. This segmentation allows the system to handle high transaction rates by distributing the journaling overhead across multiple units, preventing any single unit from becoming a bottleneck that would force production shutdown.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary actions by pre-allocating and pre-configuring multiple backup units and their associated journaling resources before high transaction rates occur. This preparation ensures that when transaction rates increase, the system already has the necessary infrastructure in place to handle the load without forcing shutdown, thus maintaining both recovery flexibility and throughput.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If backup site processes all data transactions synchronously with production site, then data consistency is improved, but backup site becomes bottleneck at high transaction rates

Engineering Contradiction:
Improvedata consistencyVSAvoidtransaction processing speed
Core Design Contradiction:
ReliabilityVSSpeed

Solution Approach 1:

The patent divides the backup processing into multiple parallel backup units, each handling a segment of the data transaction stream. This segmentation allows the backup site to process transactions concurrently across multiple units, maintaining data consistency within each segment while achieving higher overall processing speeds that can keep pace with high-rate production sites.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent transitions from a single-dimensional sequential backup processing model to a multi-dimensional parallel processing architecture. By adding the dimension of parallelism across multiple backup units, the system maintains data consistency (the original requirement) while dramatically increasing transaction processing capacity to handle high-speed production environments.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Quantity of substance

If conventional tape backup is used for data protection, then storage cost is reduced, but recovery time increases and data availability decreases

Engineering Contradiction:
Improvestorage capacityVSAvoidrecovery time
Core Design Contradiction:
Quantity of substanceVSLoss of time

Solution Approach 1:

The patent replaces the mechanical tape-based backup system with an electronic/digital backup architecture using multiple parallel backup units. This substitution eliminates the physical limitations of tape media (sequential access, slow speeds) while maintaining cost-effective storage capacity, enabling rapid data recovery and continuous availability without the time penalties of conventional tape systems.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS8862546B1Virtual access roll
Publication Date: 2014.10.14 EMC IP HLDG CO LLC
  • US8862546B1 patent drawing
  • US8862546B1 patent drawing
  • US8862546B1 patent drawing

AI summary

A method, system, and program product for data replication comprising, building a virtual image of a point in time in a Data Protection Appliance (DPA), taking a storage array based snapshot of a current image, creating a hot pull session and exposing a LUN containing the point in time image at the DPA.