'Uncategorized' Category

  • email, the g.cs.miami.edu and m.cs.miami.edu placeholder domains

    July 4, 2017

    Email for the department is generally addressed to the domain cs.miami.edu. The remainder of this post is for those curious about the department’s email routing, or special cases were it is important to know more about our email routing. By Internet standards, email is routed to a machine based on the domain portion of the […]

  • rpcinfo crash on Centos 7

    June 11, 2017

    At 4:30pm on Saturday, 10 June, victor reports he cannot log into rosecrans. This is because the ypbind had crashed on sickles, and the NIS maps were not being distributed. No rpc services can start without rpcbind, among them ypbind. For our distro CentOS Linux release 7.3.1611 (Core) the following bug reports were found: bugzilla.redhat.com […]

  • Lisbon and Paris infrastructures

    June 8, 2017

    The code name Lisbon refers the the architecture of things put in place during the creation of the third floor server room. It takes its name after the name of the ASA 5000 firewall implemented at that time. The previous architecture was Paris, named after the Paris server that was at the center of the […]

  • Notes on power distribution

    June 8, 2017

    The CSC/CCS server room is powered by 225 Amps of 3 phase, 120V power, or 46.7 KVa. The 225 Amp circuit breaker for this is on the 1st floor, labeled PNL-SR 3rd Floor. It is located at the bottom of the breaker box, not along the two columns of lower amperage breakers; in a box […]

  • Notes on Power and Cooling in Lisbon

    June 7, 2017

    This is r162 of documentation found in the repository svn://svn.cs.miami.edu/csadmin. POWER IN THE CSC SERVER ROOM document history: 26 june 2015, created bjr 29 june, update 26 july, update OVERVIEW A 200A 3ph line comes from the generator, via operations, to the electrical panel on the back wall. The individual breakers in the panel provide […]

  • The .as and .csc departmental web pages

    June 7, 2017

    On July 25, 2015, revision 57 was made to svn.cs.miami.edu/cscadmin that implemented the separation of csc web pages under the supervision of the College of Arts and Sciences and those which remain under the supervision of the department. In order to increase the web appeal of the Arts & Sciences, the college contracted a professional […]

  • Ewell migration file layout and link migration

    June 7, 2017

    Since about 2000, homepages of CSC are served by a tiered architecture that spans three security levels. The machine implementing www.cs.miami.edu is in a CSC DMZ (an area of internet facing machines that employs firestops to mitigate compromise). However the files originate on the machines that handle department home directories. The files are provided from […]

  • Mcclellan to Ewell Migration

    June 6, 2017

    Home directories are being migrated from mcclellan to ewell. Logins will be disabled on mcclellan, but the data will remain as a backup while the transition settles. Login in to ewell.cs.miami.edu. The data layout is identical to what was on mcclellan. Passwords have been moved forward to ewell. If you use gmail.cs.miami.edu for departmental email, […]

  • CSC onramp to UM’s high speed Science Lambda

    June 6, 2017

    Sickles, Armistead and Rosecrans form our scientific compute cluster. In order that they scale to the full CCS resources, we synchronize our Linux distro with theirs. They are in an NIS cloud with NFS mounted home directories to give uniform access to all machines. Sickles also has a K80 GPU. To support big data, CCS […]

  • Proxy SSH

    June 13, 2015

    There was a post on my own blog in February about how to log in directly to lab machines, hopping through Lee in a transparent way. Proxy SSH was described in this helpful article. It consists of running “nc” (netcat) on one machine to pass all of the ssh connection onto another machine. It depends […]

 
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