Specifications
Chapter 4: SteelEye DataKeeper for Linux
Introduction
SteelEye DataKeeper for Linux provides an integrated data mirroring capability for LifeKeeper
environments. This feature enables LifeKeeper resources to operate in shared and non-shared
storage environments.
Mirroring with SteelEye DataKeeper for Linux
How Steeleye DataKeeper Works
Mirroring with SteelEye DataKeeper for Linux
SteelEye DataKeeper for Linux offers an alternative for customers who want to build a high
availability cluster (using SteelEye LifeKeeper) without shared storage or who simply want to
replicate business-critical data in real-time between servers.
SteelEye DataKeeper uses either synchronous or asynchronous volume-level mirroring to replicate
data from the primary server (mirror source) to one or more backup servers (mirror targets).
DataKeeper Features
SteelEye DataKeeper includes the following features:
l Allows data to be reliably, efficiently and consistently mirrored to remote locations over any
TCP/IP-based Local Area Network (LAN) or Wide Area Network (WAN).
l Supports synchronous or asynchronous mirroring.
l Transparent to the applications involved because replication is done at the block level below
the file system.
l Supports multiple simultaneous mirror targetsincluding cascading failover to those targets
when used with LifeKeeper.
l Supports point-in-time data rewind to allow recovery of lost or corrupted data.
l Built-in network compression allows higher maximum throughput on Wide Area Networks.
l Supports all major file systems (see the SPSfor Linux Release Notes product description for
more information regarding journaling file system support).
SteelEye Protection Suite for Linux255