HP Tru64 UNIX and TruCluster Server Version 5.1B-5 Patch Summary and Release Notes (March 2009)

3.2.1.2 Cluster Cloning Offers Alternative to No-Roll Patching
This kit provides a new installation method, generically referred to as cloning, using
a new tool named dupclone . The process consists of two primary steps:
• Creating an exact duplicate of an existing system on an alternate set of disk drives.
• Using dupclone to install the patch kit to the alternate disk set. After completion,
the system can immediately be rebooted using the alternate disks.
See the Patch Installation Instructions document and the new dupclone(8) reference page
for information about using dupclone. See “dupclone Error Message Can Be Ignored”
(page 30) for information about a message you may see when using dupclone.
3.2.1.3 Link Aggregation Extended to Cluster LAN Interconnects
This kit provides enhanced support for link aggregation (LAG) by extending it to cluster
LAN interconnects. It does this by decreasing the latency associated with time critical
Interconnect Communication Subsystem (ICS) remote procedure calls and by increasing
the available bandwidth of the LAN interconnect, thereby allowing increased
interconnect throughput.
Latency is improved though multiple active interfaces decreasing queue sizes (link
aggregation) and through the separation of ICS channels that prefer low latency from
channels that require high bandwidth.
Throughput is improved from multiple active interfaces decreasing queue sizes.
The primary goal is to distribute cluster component channel traffic among the interfaces
that form part of the link aggregation group.
These changes are implemented with the following three new sysconfigtab attributes,
which configure the interfaces and create the LAG set:
ics_tcp_lag0 Configures a LAN interface to be part of the LAG
set.
ics_tcp_lag_dist Specifies the lag traffic distribution algorithm for
a LAG interface.
ics_tcp_lag_serv_weights Based on this value, the channel traffic for an ICS
channel is distributed over the LAG interface.
CAUTION: Do not modify the default value of these attributes unless instructed to
do so by support personnel.
The following restrictions apply the to the use of these attributes:
• Supported only on DEGPA (alt), DEGXA (bcm), and DE60x (ee) network interface
cards (NICs).
• Supported only on Ethernet (802.3 CSMA/CD) links.
• NetRAIN virtual interfaces cannot be included in link aggregation groups.
• Ports must be operating in full duplex mode.
40 Tru64 UNIX Patches