Silly Cluster Tricks - Vol. 1
Serially executing the cdrom tray eject command on a 18-node cluster of Dell PowerEdge 1950 servers.
This is actually more useful than it looks. With piles of hardware getting IPs and hostnames assigned dynamically it is always good to make sure that your machines are named the way you expect, especially if MAC addresses were gathered or organized "by hand" -- it can be pretty easy to mess the order up.
One way to test is to run the "eject" command serially (in order by hostname).
If the trays pop out sequentially then you know that your nodes have been provisioned in the proper order.
Side note - this is a pretty beefy cluster. Each of the 18 Dell 1950 servers has dual Quad-Core CPUs and 32 gigs of memory.
Silly Cluster Tricks - Vol. 1
Serially executing the cdrom tray eject command on a 18-node cluster of Dell PowerEdge 1950 servers.
This is actually more useful than it looks. With piles of hardware getting IPs and hostnames assigned dynamically it is always good to make sure that your machines are named the way you expect, especially if MAC addresses were gathered or organized "by hand" -- it can be pretty easy to mess the order up.
One way to test is to run the "eject" command serially (in order by hostname).
If the trays pop out sequentially then you know that your nodes have been provisioned in the proper order.
Side note - this is a pretty beefy cluster. Each of the 18 Dell 1950 servers has dual Quad-Core CPUs and 32 gigs of memory.