| Title: | VAX and Alpha VMS |
| Notice: | This is a new VMSnotes, please read note 2.1 |
| Moderator: | VAXAXP::BERNARDO |
| Created: | Wed Jan 22 1997 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 703 |
| Total number of notes: | 3722 |
Hi all,
what about performance adjustments of cluster traffic via two
independent FDDI rings, if all members are connected to both rings ?
As far as I know, there is no way to force traffic onto one
particular adapter, if the other one is equal (buffer size)
But I still have the following questions:
1.) Test with a 2-node cluster, 2 Ethernets, each node connected
to both ethernets.
Disconnecting the "current" LAN --> 3 - 5 seconds of delay, then
continuing on the other LAN without any problem, only a slight
performance loss when copying a large file.
- same with FDDI (not able to test with)
- this timeout of approx. 3 - 5 seconds --> a SYSGEN-value ?
2.) Additionally, what happens, if the "current" LAN gets flooded
(broadcast storm,..) --> will there be the switch to the other
LAN, although some (but not many) packets can be sent, including
the LAVC-hello message.
Any help will be highly appreciated.
Thanks,
Ralph
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 136.1 | See SYS$EXAMPLE:LAVC*, PREFER.* | XDELTA::HOFFMAN | Steve, OpenVMS Engineering | Tue Feb 04 1997 10:14 | 28 |
SPEZKO::CLUSTER is a better spot for VMScluster questions.
: As far as I know, there is no way to force traffic onto one
: particular adapter, if the other one is equal (buffer size)
See the SYS$EXAMPLE:LAVC*.* and *PREFER* tools.
: 1.) Test with a 2-node cluster, 2 Ethernets, each node connected
: to both ethernets.
: Disconnecting the "current" LAN --> 3 - 5 seconds of delay, then
: continuing on the other LAN without any problem, only a slight
: performance loss when copying a large file.
- same with FDDI (not able to test with)
- this timeout of approx. 3 - 5 seconds --> a SYSGEN-value ?
The PEDRIVER NI port driver polls at 3 second intervals.
I don't believe this particular timer is adjustable.
: 2.) Additionally, what happens, if the "current" LAN gets flooded
: (broadcast storm,..) --> will there be the switch to the other
: LAN, although some (but not many) packets can be sent, including
: the LAVC-hello message.
If one NI fails, SCS will fail over to any alternate NI path available.
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