So to me, it looks like you have two options to guarantee accurate sequential node assignment:
1) Collect the MACs serially (one at a time).
2) Write a tool that does the operation I described over the serial console. (and then submit it to OSCAR! ;-))
Jeremy
At 07:11 PM 12/12/2003, Bernard Li wrote:
Hey Jeremy:
I am not too familiar with PXE-BOOT - what sort of utilities are available for me to use on the nodes so that I can grab the mac address?
I only needed it for the re-direction so that I am sure that the mac address that showed up on OSCAR's collection tool is the right one (in order) - because some times for you boot up 5 at the same time, for whatever reason #3 may have hardware problems and didn't boot, and #4's mac address comes before and that would screw up your assignment - which won't be pretty :-)
Thanks for your help!
Bernard
Question: why were you needing to do this? I ask because some people collect MAC addy's over the serial ports using a method that's similar...
1) just creating a utility that spits out the mac address and offering it up PXE style
2) boot nodes, listen on serial ports, which are already mapped to specific nodes
3) because serials are mapped to nodes already, MACs spit across serial can now be linked to nodes
4) adjust PXE settings to build an OS and reboot nodes (this could be automatic, or via remote power control)
Viola! Parallel MAC collection accomplished! In a configuration w/o serial consoles, this same method could also be employed serially (no pun intended) just by using power control alone. I hope to offer such an option someday in OSCAR.
Jeremy
Thanks,
Bernard
Jeremy Enos wrote:
In /tftpboot/pxelinux.cfg/default, change the add the following to the "append" line:
append = "console=tty0 console=ttyS0,9600"
(don't blow away the other stuff on the append line of course)
You may also want to increase the speed of course. Let me know how that goes.
Jeremy
At 06:16 PM 12/12/2003, Bernard Li wrote:
Hey Jeremey:
I don't know _exactly_ what speed it's transferring at, but I set it to 115200 in BIOS and also in agetty and it seems to be okay. I am actually not too concerned about SIS, I needed PXE-BOOT!!
Know how to get that going? ;-)
Thanks,
Bernard
Jeremy Enos wrote:
Ah... that's because in the OS environment, something needs to be set explicitly for console redirection. The SIS network boot kernel can be set that way very easily (just change options on the kernel loader line). However... I tried this, and it worked just fine, but: it slows EVERYTHING down to the speed that the serial line can transfer the stdout!!! Hence... it seemed like a very bad idea for using during the build. That was at 9600 baud though... I know the Cyclades can be set faster, but I didn't experiment with that yet... maybe it's not such a big deal.
Jeremy
At 01:39 PM 12/12/2003, Bernard Li wrote:
We are using it for our opteron clusters, it seems to work okay when we're in BIOS or have booted into Linux, but none of the PXE-boot/SIS stuff gets re-directed. It would be handy for OSCAR installations... any ideas?
Thanks,
Bernard
Neil Gorsuch wrote:
We use cyclades on one of our test clusters. I don't remember what particular models. Jeremy set them up, so he would be better to answer these types of questions. On Fri, 2003-12-12 at 12:53, Bernard Li wrote:
Anybody have experience using the Cyclades TS-3000 for terminal re-direction?
Thanks,
Bernard
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