Setting up nodes with built in hard disk

Carlos O'Donell carlos at baldric.uwo.ca
Wed Jun 19 08:27:22 EDT 2002


> With those 60 nodes netbooting, what kind of network overhead are you 
> seeing used for larger applications, and the initial boot of each 
> machine?  Are you using two seperate networks, one for NFS and the other 
> for your mpi/comm traffic?
> 
> Doug
>

We have a cluster of ~50 PARISC boxes and only /var and /home
(some are diskless) are on NFS. The NFS server _should_ really be 
running GigE, but we only have bonded 2x100MBit (We have 10/100 24 Port
Baystack 450 switches in a stack -> 2.3GBit interconnect).

And I can say that if you need to reboot the systems...
be prepared to time-step the starts. We almost always
completely throttle the NFS server bandwidth 
(PIII 2x1GHz, 1.5GB RAM). 

50 x 500k/s = 25MB/s = 200MBit 

Some optimizations are required... and thusly we are back
to 'need to setup big phat fast NFS server' tasks that 
admins are so used to ;)

c.

_______________________________________________
Beowulf mailing list, Beowulf at beowulf.org
To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf



More information about the Beowulf mailing list