Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

Table 5-3
LLT timer tunable parameters (continued)
Dependency with other
LLT tunable parameters
When to changeDefaultDescriptionLLT
parameter
This timer value should not
be more than peerinact timer
value. Also, it should not be
close to the peerinact timer
value.
Disable the out of timer
context heart-beating
mechanism by setting the
value of this timer to 0 for
planned replacement of
faulty network cable /switch.
In some circumstances, when
the private networks links
are very slow or nodes in the
cluster are very busy,
increase the value
200LLT sends out of timer
context heartbeats to keep
the node alive when LLT
timer does not run at regular
interval. This option
specifies the amount of time
to wait before sending a
heartbeat in case of timer not
running.
If this timer tunable is set to
0, the out of timer context
heartbeating mechanism is
disabled.
timetosendhb
18000This value specifies the
maximum time for which
LLT will send contiguous out
of timer context heartbeats.
sendhbcap
Not applicableDo not change this value for
performance reasons.
Lowering the value can result
in unnecessary
retransmissions/negative
acknowledgement traffic.
You can increase the value of
oos if the round trip time is
large in the cluster (for
example, campus cluster).
10If the out-of-sequence timer
has expired for a node, LLT
sends an appropriate NAK to
that node. LLT does not send
a NAK as soon as it receives
an oos packet. It waits for the
oos timer value before
sending the NAK.
oos
Not applicableDo not change this value.
Lowering the value can result
in unnecessary
retransmissions.
You can increase the value of
retrans if the round trip time
is large in the cluster (for
example, campus cluster).
10LLT retransmits a packet if
it does not receive its
acknowledgement for this
timer interval value.
retrans
255Tunable parameters
About LLT tunable parameters