Veritas Storage Foundation by Symantec includes Veritas File System (VxFS) and Veritas Volume Manager (VxVM).
A file system is simply a method for storing and organizing computer files and the data they contain to make it easy to find and access them. More formally, a file system is a set of abstract data types (such as metadata) that are implemented for the storage, hierarchical organization, manipulation, navigation, access, and retrieval of data.
Veritas File System (VxFS) was the first commercial journaling file system. With journaling, metadata changes are first written to a log (or journal) then to disk. Since changes do not need to be written in multiple places, throughput is much faster as the metadata is written asynchronously.
VxFS is also an extent-based, intent logging file system. VxFS is designed for use in operating environments that require high performance and availability and deal with large amounts of data.
Veritas Volume Manager (VxVM) by Symantec is a storage management subsystem that allows you to manage physical disks and logical unit numbers (LUNs) as logical devices called volumes. A VxVM volume appears to applications and the operating system as a physical device on which file systems, databases and other managed data objects can be configured.
VxVM provides easy-to-use online disk storage management for computing environments and Storage Area Network (SAN) environments. By supporting the Redundant Array of Independent Disks (RAID) model, VxVM can be configured to protect against disk and hardware failure, and to increase I/O throughput. Additionally, VxVM provides features that enhance fault tolerance and fast recovery from disk failure or storage array failure.
VxVM overcomes restrictions imposed by hardware disk devices and by LUNs by providing a logical volume management layer. This allows volumes to span multiple disks and LUNs.
VxVM provides the tools to improve performance and ensure data availability and integrity. You can also use VxVM to dynamically configure storage while the system is active.
VxFS and VxVM are included in all Veritas Storage Foundation products. If you have purchased a Veritas Storage Foundation product, VxFS and VxVM are installed and updated as part of that product. Do not install or update them as individual components.
Veritas Storage Foundation includes the dynamic multi-pathing functionality.
The Veritas Replicator option, which replicates data to remote locations over an IP network, can also be licensed with this product.
Before you install the product, read the Veritas Storage Foundation Release Notes.
To install the product, follow the instructions in the Veritas Storage Foundation Installation Guide.