10 More Discussions You Might Find Interesting
1. AIX
hello
ive 2 nodes aix 6100-04-10-1119 with hacmp 6.1.0.0
my qustion is :
can i add default gateway to one member node with hacmp a live or to do take over to realse one of the members ?
thanks
When it is urgent, then open the thread up in the appropriate subforum next time, thanks. (3 Replies)
Discussion started by: ariec
3 Replies
2. AIX
Hi,
I have question about HA. I have 2 node cluster (node A and node B). I have configured network and disk HB. If my network is up and i remove both the fc cables from node A will my cluster failover to node B? I have checked and its not working, if i want my cluster to failover in this... (5 Replies)
Discussion started by: powerAIX
5 Replies
3. AIX
Hi.
We have a two node HA cluster.
We got a request to change one of the VG name?
Is there an option to do this online ? If it requires downtime can someone please explain me the steps for doing it ?
Let me know if you need any outputs from the servers (1 Reply)
Discussion started by: newtoaixos
1 Replies
4. AIX
Does anyone has idea about, what is the ibm standard HACMP trip interval?
We have 20 second.
lssrc -ls topsvcs
Subsystem Group PID Status
topsvcs topsvcs 1843200 active
Network Name Indx Defd Mbrs St Adapter ID Group ID
HB Interval =... (7 Replies)
Discussion started by: allwin
7 Replies
5. AIX
hi,
when I do a failover, hacmp always starts db2 but recently it fails to start db2..noticed the issue is db2nodes.cfg is not modified by hacmp and is still showing primary node..manually changed the node name to secondary after which db2 started immediately..unable to figure out why hacmp is... (4 Replies)
Discussion started by: gkr747
4 Replies
6. AIX
hi
can anyone explain the concepts of HACMP and configuration (step by step) (2 Replies)
Discussion started by: udtyuvaraj
2 Replies
7. AIX
Hi,
Can we use network for heartbeat, I mean can we use different network card for heartbeat. (6 Replies)
Discussion started by: vjm
6 Replies
8. AIX
Hi All,
How do I restore previous state if my current update failed w/o multibos? Is that possible?
Thanks in advance for any idea. (3 Replies)
Discussion started by: itik
3 Replies
9. AIX
Hi All,
Is multibos really needed on each sp update on a hacmp config?
Is someone using it?
I have an up coming update and I don't have time to understand this technology. Does SP update might screw you up and you can't restore properly from it?
Thanks for any idea in advance. (1 Reply)
Discussion started by: itik
1 Replies
10. HP-UX
Hi,
Can anybody advice whether it is possible to configure HACMP in HP-UX Server.
To my knowledge HACMP is IBM Solution.
Thanks && Regards,
N. Poorna Chandra Rao. (2 Replies)
Discussion started by: npcrao
2 Replies
lcpu_attr(5) File Formats Manual lcpu_attr(5)
NAME
lcpu_attr - dynamically enable or disable LCPU attribute of the default processor set
VALUES
Fail Safe
Default
the LCPU attribute of the default processor set is disabled
Allowed values
or
DESCRIPTION
This tunable dynamically enables or disables the logical processor (LCPU) attribute in the default processor set. On systems supporting
hyper-threading technology, each hyper-thread is represented as an LCPU.
When the LCPU attribute is enabled, the processor cores in the default processor have hyper-threading enabled. If the LCPU attribute is
disabled, the physical processors in the default processor set behave as single threaded processor cores.
See pset_setattr(2) for information about managing the LCPU attribute in processor sets other than the default processor set.
Who Is Expected to Change This Tunable?
System administrators that wish to change hyper-threading ability in the default processor set.
Restrictions on Changing
The tunable has no effect on platforms that do not have hyper-threading capability or systems with hyper-threading disabled at the firmware
level. On systems that support hyper-threading, the firmware feature must be enabled to dynamically enable/disable the LCPU attribute in
the default processor set.
When Should the Tunable Be Turned On?
The tunable should be turned on to enable the LCPU attribute in the default processor set to take advantage of hyper-threading. If the
applications running on the system see performance benefits, the LCPU attribute should remain enabled.
What Are the Side Effects of Turning the Tunable On?
Some workloads may experience performance degradation when the LCPU attribute is enabled.
When Should the Tunable Be Turned Off?
Some applications may experience performance degradation or may not see any performance benefits from using hyper-threading. In this case,
this tunable should be turned off.
What Are the Side Effects of Turning the Tunable Off?
With LCPU turned off, applications may not take advantage of hyper-threading.
What Other Tunables Should Be Changed at the Same Time?
None.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
AUTHOR
was developed by HP.
SEE ALSO
psrset(1M), pset_assign(2), pset_bind(2), pset_create(2), pset_ctl(2), pset_destroy(2), privgrp(4).
Tunable Kernel Parameters lcpu_attr(5)