For new distributed routing support, must first run this script as
        root to generate a data file for each existing experiment.

		sudo sql/gentopmaps.pl

vserver/pcplab). Rather then 10000s of fixed node entries in the DB,
create node entries on the fly as needed (assign_wrapper), and then
delete them when they are no longer used (nfree). When new nodes check
in, no longer create all those nodes table entries (utils/newnode.in
and tbsetup/plab/libplab.py.in).

I've added a new library: db/Node.pm which is something I started a
while back, and decided to commit, along with the support for creating
and deleting virtual nodes. CreateVnodes() creates a new set of nodes,
choosing non-conflicting names in the DB, and then immediately
reserves them to the pid/eid specified. DeleteVnodes takes a list of
vnodes and deletes them from nodes,reserved,etc. This library does a
few other things which I am going to be playing with, so you might
want to go read the comment at the top of the file. Feel free to speak
up. CreateVnodes() is from called assign_wrapper when a node type has
the "isdynamic" property. Otherwise does the existing avail/nalloc
stuff. DeleteVnodes() is called from nfree when the node type has the
isdynamic property.

I've added a script (sql/delvnodes.pl) to run after updating the DB
and software. All free pcvm and pcplab virtual nodes are deleted from
the DB; reserved ones will get deleted whenever their experiment ends.
I've noted all of this in doc/UPDATING, including setting the
isdynamic property on pcvm in the node_types table.

I've left tbsetup/plab/libplab.py.in to create a single pcplab node
for the management sliver (still called -20). We can worry about this
later.

All this for modelnet?

their ports.

it out of a file in /usr/testbed/etc .

We put it in a seperate file from the rest of the certificate, because
we need the fingerprint to be publically-readable.

instead of only 10 characters.

we were attempting to start up duplicate copies of everything as boss
went down.

better.

our source and DB that need to be made on boss and ops. Things like
changes to ports or system configuration files should go into this
file.