Virtual TapeServer 6.02.00 Installation Guide

HP Virtual TapeServer Installation Guide 48 HP Part Number 528654-006 Sept 2006
VTS AutoCopy Feature
This feature must be configured via certain settings in the VTS Configuration File. The settings
designate which pools are to be monitored for mount and dismount activity for AutoCopy
(AutoCopy is a Pool Level setting) and which VTS system is to be the recipient of copies of the
modified virtual cartridges. AutoCopy assumes that a virtual cartridge mounted in Read/Write
(or With Ring) mode will be modified upon dismount. NonStop mount requests which bear the
No Ring designation will be mounted as Read Only and will not be automatically copied.
EMS and SSH are prerequisites of AutoCopy. The VTS EMS feature must be configured (and
determined to be running correctly). SSH must also be configured between the sender and
receiver VTS systems before activating AutoCopy.
AutoCopy performs the copy operator from sender (the VTS system configured for AutoCopy
that has detected an AutoCopy-eligible dismount) to receiver (the VTS system that will be the
copy target) via an SSH transfer. SSH (Secure Shell) performs encrypted communication
between VTS systems. For VTS purposes, SSH must be configured for Protocol 2 RSA or DSA
encryption using Public Key Identification only, requiring that the sender’s Public Key (of the
secure Public/Private Key Pair of each VTS system’s Runtime User, the userid under which the
VTS Engine runs) be installed in the specific authorized_keys file on the receiver VTS system.
It is very important that as SSH communications flow though network connections (from one
VTS system to another), either a single gigabit (or greater) connection be used (on both sender
and receiver) to handle both the SSH data transfer and other communications between VTS
systems. If other non-VTS related traffic is flowing over this segment of the company intranet
or a completely separate, a second (private) gigabit (or greater) subnet must be setup between
VTS systems designated for SSH data traffic only.
The following are the VTS Configuration File parameters relevant to AutoCopy on the sender
system:
• autocopy_enable - Required: Specify ‘YES’ to enable
AUTOCOPY.
• autocopy_pools - Required: List of pools eligible for
AUTOCOPY.
• autocopy_target_poolname - See note: One for each pool listed in
“autocopy_pools” to designate copy-target.
• autocopy_target_anypool - Optional: Copy-target for any pool listed in
“autocopy pools”.
CONFIGURATION NOTE: A copy-target (receiver) must be designated for each pool specified
in the autocopy_pools list. Either specific targets (autocopy_target_poolname), “anypool”
targets (autocopy_target_anypool) or both may be used, however, there must be a specific
target for each pool if an anypool target statement is not used. The autocopy_pools list itself
is formed as a string of (receiver) system names (blank separated). The receiver/target VTS
systems themselves do not have to be configured (but may) for either EMS or AutoCopy;
only for SSH, as described earlier. Additionally, as each virtual cartridge will be copied to the
identical vault and pool on the target system (matching the vault and pool under which the
virtual cartridge exists on the sender system), the target system must have an identically
named vault and must not have a virtual cartridge of matching name under any other pool.
The pool itself may or may not exist prior to the Auto Copy operation; it will be automatically