WOS Object Storage

DDN’s WOS enables organizations to build highly reliable, infinitely scalable, cost-efficient storage pools for all their unstructured data needs. Available as software or delivered as a density optimized appliance, WOS is a comprehensive and purpose-built object storage solution.

True Object Storage

WOS is enabled through DDN’s underlying NoFS (no underlying file system) architecture, which minimizes disk operations with as little as a single-disk-operation for reads, and two for writes. (This sharply contrasts with the 8-10 I/O operations that POSIX file systems require, resulting in additional performance and network overhead). Further, the infinitely variable data buckets or “sector” sizes used in WOS carefully balance performance and platter utilization, while keeping system overhead very low.

• No Linux file I/ Os, no fragmentation.
• Fully contiguous object read and write operations for maximum disk efficiency.

DDN WOS Key Advantages:

Latency-Aware Access Manager

In distributed environments with replicated data, WOS minimizes the access latency for end users. When a user requests an object, WOS automatically retrieves the object from the geographic node with the lowest latency.

Meta Data Search

WOS avoids scalability bottlenecks by storing metadata in key-value stores, rather than in scale-limiting metadata databases. A highly parallelized backend metadata search allows users to query one or more indexed fields of user-specified metadata across petabytes of objects. Applications can assign their own metadata via object storage API, WOS now also supports simple search of WOS user metadata.

Self-Healing Architecture

ObjectAssure, a unique form of erasure coding, has self-healing capabilities that reduce the management effort. In case of a failed disk, ObjectAssure only reconstructs the actual data that was lost, as opposed to the entire disk. In the event of an object read error, WOS automatically recreates the object from a replica or parity to fulfil the request and then replaces the object to restore compliance with the specified data protection policy. These automatic features dramatically increase data availability and reduce operator intervention. No hard tie between physical disks and data:

• Failed drives are recovered through dispersed data placement.
• Rebuilds happen at read, not write, speed.
• Rebuild data, not disks.

Flexibility

WOS provides full flexibility to build the right storage infrastructure for any mix of applications. Customers can tune their infrastructure to meet the requirements for their data and application needs.