Virtual TapeServer 8.4 Supplemental Installation Guide

25
3
Enabling and Configuring AutoCopy and Instant DR
Data Replication is a advanced software feature that enables you to back up data to remote Virtual
TapeServer (VTS) servers. This feature was implemented as Instant DR and AutoCopy before this
release; Instant DR and AutoCopy are supported on upgraded systems.
To configure Instant DR and AutoCopy, you must configure network settings for all VTS locations.
Adhere to the following requirements and guidelines when configuring these software modules:
l The VTS server provides two Ethernet ports (eth0 and eth1). Under normal circumstances,
eth0 is used for local IP traffic to access the user interface for the VTS and for mounting
communication between VTS and hosts. When Instant DR is configured, eth1 is configured with
a routable address to communicate with additional VTS servers at remote locations.
l The Event Management Service (EMS) is responsible for monitoring mounts and dismounts
relevant to AutoCopy. Therefore, EMS must be configured and running on the VTS server as
described in the EMS chapter of the Virtual TapeServer Configuration Guide.
l SSH must be configured on all VTS servers if you want to secure data when copying data to
remote locations (for Instant DR). Also, it must be configured on all VTS servers involved in
AutoCopy operations. SSH must be configured for Protocol 2 RSA or DSA encryption using
Public Key Identification. Public Key Identification requires that the sender’s Public Key be
installed in the specific authorized_keys file on the receiver VTS system.
l It is very important that SSH communications flow though network connections from one VTS
system to another. A single gigabit connection is used to handle the SSH data transfer and
other communications between VTS systems. To prevent congestion, because of the high
volume of traffic that can flow over a connection used for Instant DR or Autocopy, it is
recommended that a completely separate gigabit subnet be used to connect VTS systems.
Network speeds of less than a gigabit are not recommended. The ProLiant servers do not
support speeds of greater than one gigabit.
After completing the procedures in this chapter, refer to the Virtual TapeServer Configuration Guide
for instructions on using the Data Replication feature to import and export virtual tapes.