Veritas Brings Data Replication to Unix
By Dave Simpson
This month, Veritas Software rolled out a data replication tool for automated data distribution. The Veritas Storage Replicator (VSR) is a software-only solution that competes with more expensive hardware-software combos such as EMC`s Symmetrix Remote Data Facility (SRDF) and database replication tools such as those from Oracle and Sybase. Unlike database replicators, VSR replicates all system data.
Data replication applies primarily to data distribution in applications such as disaster recovery, data warehousing, and decision support.
VSR works only with Sun`s Solaris operating system, but a version for Windows NT is due late this year or early next year and an HP-UX implementation is slated for late next year, according to Eric Burgener, group product manager at Veritas. VSR works with Sun`s UFS and NFS file systems and, for greater functionality, with the Veritas File System. The replicator is currently limited to four nodes.
Unlike most other data replication products, VSR has multi-node bi-directional read/write capability, which allows users to have hot file systems at primary and remote sites. VSR uses synchronous rather than asynchronous replication, trading a slight performance degradation for data integrity (see figure). An asynchronous implementation is planned for the second half of the year.
The Veritas Storage Replicator is priced on a per-node basis in accordance with Sun`s platform tiers. Prices range from $10,000 to $45,000 per node.