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read. The impl (menu stuff) needs to be cleaned up for sure.

TB_IMAGEID_READINFO - I was mistaken about the level of access implied
by TB_IMAGEID_ACCESS.

currently defined as 30 minutes, to keep false positives to a minimum. Sends
mail to testbed-ops if/when it finds any. The timing is not precise, as it
only polls in between loading machines, but this is fine for our purposes.

people who want to log into the delay nodes and change a specific link.

stuff so that the web page did not need to do anything except display
and form processing. Add tbsetup/node_control for backend so that it
can be called from the command line too. The virt_nodes table is also
updated (for those values that have virt_nodes equivalents), and this
mostly implies that changes can be applied only to swapped in
experiments since we use the reserved table to map pcXXX to its vname
so that the virt_nodes table can be updated. It is an easy extension
to allow changes based on the pid/eid/vname, but I do not see a reason
to support this ability yet. Note usage:

    Usage: node_control name=value [name=value ...] node [node ...]
           node_control -e pid,eid name=value [name=value ...]
           node_control -l
    For multiword values, use name='word0 ... wordN'
    Use -l to get a list of operational parameters you can change.
    Use -e to change parameters of all nodes in an experiment.

    {824} stoller$ /build/testbed/install//bin/node_control -l
      next_boot_osid            - (administrators only)
      startup_command
      bios_version              - (administrators only)
      rpms                      - (multiple options allowed)
      default_boot_cmdline
      default_boot_path
      default_boot_osid
      next_pxe_boot_path        - (administrators only)
      tarfiles                  - (multiple options allowed)
      pxe_boot_path             - (administrators only)
      next_boot_cmdline         - (administrators only)
      deltas                    - (multiple options allowed)
      next_boot_path            - (administrators only)

request.

whose idea was that. Oh right, mine.

a lurking case where GID is null. Need to find that, but in the
meantime this will keep the tmcd happy.

there have been 260,000 connects (and 260,000 disconnects) to the
mysqld server. 240,000 of them were from the TMCD! I've changed the DB
code to keep the connection to the server open, and let the server
time it out. The client side code library code already deals with a
auto reconnect if the server goes away, so no reason to open/close
this connection for every single DB query. Besides, it might help
reduce the amount of time it takes to answer a single tmcd query, and
that would be a good thing.

Made this number more easily tweakable: just set $max_tries in vlanLock().
Also, only prints out every 5th failure, and in a form that should make it
more clear that it's a transient, recoverable, error.

was preventing VLANs from being cleared out before they were delted.

document.

interface for this node.

control interface for this node.

operate on, but it turns out this can happen during normal operations. For
example, an experiment with no VLANs.

hold separate values for each of the two pipes. This allows us to
treat the links asymmetrically with respect to the delay node
configuration. Changes to tmcd to return the expanded info, and rework
(completely) delay_config to allow user to change the duplex
characteristics (just like before), or just simplex characteristics by
specifying the pipe number. By convention (I invented) pipe 0 is
traffic coming in on iface0. Of course, none of the front end stuff
has been changed, so the changing a single pipe does not cause
anything in virt_lans to be changed, so those changes will be lost at
swapout. Also get rid of all the ssh'ed pipe config stuff in
delay_config. Instead, add a client side script called update_delays
to /etc/testbed on the experiment nodes. After updating the delays
table, just ssh over and run that script, which calls the existing
code. Less distribution of knowledge.

we can now handle cross-switch links.