1. Volume Replicator 3.5 New Features
Web GUI
Web-based management console
Simplified framework for off-host processsing
Define and execute scripts to automate procedure
Offline Data Verification
Single command to verify that primary and secondar data are exactly the same
Enhancements in administrative interface
Commands to delete primary
Ability to set the same replication attributes on all nodes
Ablity to start resynchronization of Secondary from any node
Firewall support
Configure VVR to replicate in a firewall environment
New Features in This Release
This release of VERITAS Volume Replicator includes the following features:
Volume Replicator Web Console (VRW)
VRWis theWeb-based GUI for VVR. For details, see the Volume ReplicatorWeb Console
Administrator’s Guide and Volume Replicator Web Console Release Notes.
Simplified Framework for Using IBC messaging With Off-host Processing
Earlier, using IBC messaging for off-host processing required execution of multiple
commands on multiple hosts. Now, VVR provides the vradmin ibc command,
which simplifies this task and enables you to define and execute scripts to automate
the procedure.
Offline Data Verification
The vradmin syncrvg command and the vradmin syncvol commands have been
enhanced to verify whether the Primary and Secondary data is identical. This data
verification can only be done while application is inactive.
Integration of VERITAS Volume Replicator Administrative Services With VxVM and
VVR
The Volume Replicator Administrative Services (VR-AS) package has been merged
with the VERITAS Volume Manager package. This provides simplified installation of
VVR and avoids compatibility issues between VVR and VR-AS.
Firewall Support
Now you can configure VVR to replicate in a firewall environment. For more
information, see the VERITAS Volume Replicator Configuration Notes.

2. Volume Replicator 3.5 New Features
Support for Layered SRL
Simplified Upgrade Procedure
New VVR commands
Remove primary from RDS
Replay a DCM that is active
Display VVR and VxVM memory pool statistics
Display names of the Rlinks that are associated with the specific RVG
Display names of data volumes that are associated with specific RVG
Display application statistics
Support for Layered SRL
In the earlier releases of VVR, the SRL could not be configured as a stripe-mirror
volume. In this release of VVR, the SRL can be a striped-mirror volume. If you want to
convert an existing mirror-stripe SRL, use the following command:
# vxassist -g diskgroup convert srl layout=stripe-mirror
Simplified Upgrade Procedure
This release of VVR includes scripts to simplify the upgrade procedure. For
instructions, see the VERITAS Volume Replicator Administrator’s Guide.
New Tunables
Two new tunables have been included in this release: vol_dcm_replay_size, and
vol_nm_hb_timeout. Refer to the
VERITAS Volume Replicator Configuration Notes for information about these tunables.
New Mode of SRL Protection—autodcm
By default, SRL protection is set to autodcm; if the SRL is about to overflow, VVR
switches automatically to dcm logging mode and writes continue. Previously, writes
were throttled until either the RLINK disconnected or until 20MB or 5% of the SRL,
whichever is lower, was free.
New VVR Commands
In addition to the above enhancements, VVR provides new commands to perform the
following tasks:
To remove a Primary from its RDS vradmin delpri
To replay a DCM that is active because of an SRL overflow or
failback logging, that is, to incrementally synchronize the
Secondary.
vradmin resync
To display the VVR and VxVM memory pool statistics. vxmemstat
To prematurely terminate the receive and regrecv
operations before the IBC message arrives on the Secondary.
vxibc stoprecv
To display the names of the RLINKs that are associated with
the specified RVG.
vxrvg getrlinks
To display the names of the data volumes that are associated
with the specified RVG.
vxrvg getdatavols
To display application statistics for the specified RVG vxrvg stats