Thayer School Computing Services supports all computing needs of the Thayer School community, including faculty, staff, graduate students, and undergraduates.
ThayerFS Maintenance – March 16, 2013
On Saturday, March 16, 2013, Thayer Computing Services will be upgrading software and performing hardware maintenance on our ThayerFS file server. This upgrade requires that ThayerFS will be offline and unavailable from 8:00am until 2:00pm on that day.
In addition to direct ThayerFS file access, many other Thayer systems will be down during this time, due to their dependency on ThayerFS. Please see our ThayerFS Upgrade page for more information.
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March 1, 2013
I recently ran into an issue installing FreeBSD on a system that already had some disks & zpools. Because the disks were partitioned previously, automatic multipath was not an option as the last sector of all hard drives isn’t available to store an ID. The remaining option is to do manual multipath, and it needs to be done every time the system boots.
Here’s an rc script that will run early in the sequence and create a multipath “link” between drives based on their serial number.
November 9, 2012
Sending ZFS snapshots across the wires can be done via multiple mechanisms. Here are examples of how you can go about it and what the strengths and weaknesses are for each approach.
strengths: encryption / 1 command on the sender
zfs send tank/volume@snapshot | ssh email@example.com zfs receive tank/new_volume
strengths: pretty fast
weaknesses: no encryption / 2 commands on each side that need to happen in sync
on the receiver
netcat -w 30 -l -p 1337 | zfs [snip...]
October 5, 2012
With the ever growing number of Apple devices here at Thayer School, Bonjour is quickly becoming a critical protocol of our I.T. infrastructure.
To say the least, Bonjour is not designed for an enterprise environment. Sill, we advertise our printers with it in an effort to accommodate Apple users.
Here is a script I wrote that will discover which printers are currently advertised on the network. We use it along with a Nagios check to make sure [snip...]