Veritas Volume Manager 5.0 Release Notes (5900-0593, March 2010)

Veritas Volume Manager 5.0 Release Notes
New Features in VxVM 5.0
Chapter 18
imported successfully. Because using the -f option to forcibly import an incomplete disk
group counts as a successful import, the disk group can subsequently be imported without
specifying this option.
• Faster startup time
The time required to start the Veritas Volume Manager configuration daemon,
vxconfigd, to discover new devices, to initialize dynamic multipathing, and import disk
groups has been significantly reduced.
• Faster cluster node joins
The time that cluster nodes take to join a cluster has been reduced by allowing concurrent
joins.
NOTE The fast cluster node join feature is not available with Base-VxVM and Full
VxVM bundles.To enable this feature, an additional license is required.
• Remote Mirror --robust campus cluster support
The Remote Mirror feature retains the current usage model for campus cluster support
(also known as stretch cluster) where a disk group can span storage from multiple sites.
Existing utilities, such as vxdg and vxdisk have been enhanced to achieve data set
completeness, and to maintain site consistency. The preferred read policy for mirrors has
been extended so that read requests are serviced locally, if possible. A mechanism is also
provided to deal with diskgroup inconsistencies between storage at different sites (serial
split-brain scenario) and to perform fire-drill testing of site failure and recovery.
NOTE The remote mirror node join feature is not available with Base-VxVM and
Full VxVM bundles.To enable this feature, an additional license is required.
• Support for 16 cluster nodes
The clustering functionality of VxVM now supports up to 16 nodes.
NOTE The support for 16 node clusters is not available with Base-VxVM and Full
VxVM bundles. To enable this feature, an additional license is required.
• SCSI 3 PR enhancement in clusters
The keys for disabled paths have been removed so that node joins are not obstructed. In
addition, the time taken to register keys has been reduced. This applies only to VCS and
not HP Serviceguard Storage Management suite of products.