CfA: OIR Computer Resources
Sections: Hardware Software Disk Storage


OIR computing resources are mostly distributed on users' desktops, some Linux, some Windows.

There are no longer any tape drives at the CF: Consult the CF page:

Through OIR, the TDC makes available a computer for the reduction of ground-based telescope data of all types. This machine is named tdc2 and is a Dell PowerEdge 900 with 8 3 GHz cpus, 128 GB of memory, and a Gigabit Ethernet connection.

The tdc2 computer is open for use by anyone with a CF-domain account, and that has telescope data to reduce. For more information, see the Web page:

Note that much of the data obtained at the MMT or Magellan is reduced by the TDC staff. Contact tdchelp at for details.

The CF runs the publicly-available computers neptune, jupiter, cfa0, and mars. Each has slightly different combinations of number of cpus, cpu speeds and memory. Note that neptune and jupiter are located at CDP, so I/O from the 60 Garden St. complex is over a single shared Gigabit link. See:


Much non-CF-supported software is available via the tdc2 computer. For many of these programs, it is necessary to include /data/oiropt/bin and /data/oir/bin in your PATH environment variable.

Note that the /data/oiropt directory is an architecture-dependent mountpoint, such that a Linux system gets Linux-appropriate binaries, and a Solaris system gets SunOS-appropriate biaries.

Catalog searching
There are many catalogs and software search programs to make World Coordinate fits, finder charts, etc.

This is an RDB-type database manager created by John Roll. Include /data/oiropt/starbase near the beginning of your PATH environment variable.

The Starbase documents give an overview of the system.

Fits Users Need Tools - software to ease the manipulation of FITS files in C programming.
CF-supported software
The tdc2 computer is managed by the Computation Facility with all their supported software available.

Still Other local documentation:
See the OIR local documentation web page.

Disk storage

There are several places to store data:

  1. /data/oirperm   /data/oirperm2

    Two ``permanent'' storage spaces for any in OIR once you're added to the group oirgroup. Files are never deleted and are backed up nightly by the CF. You make your own dir in /data/oirperm{,2} and away you go. Please do not use this space for ordinary data reduction.

  2. P.I. disks (various)

    There are PI disks, also permanent and usually backed up. If you don't already know of such a disk, the owner probably doesn't want you to use it.

  3. Scratch disks

    Scratch disks are intended for data reduction, not permanent storage. Scratch disks are not backed up, and are purged after 90 days.

    /pool/tdc3       /pool/tdc5    /pool/megascr1
    These are NetApp NAS filers available via NFS. They are intended for use by CFA staff & students for ground-based telescope data reduction.

    Anyone can make directories on /pool/tdc5 (i.e. no group restrictions); /pool/tdc3 is limited to members of group oirgroup, and /pool/megascr1 is restricted to members of megagrp.

    In addition, /pool/tdc5 is each week of files older than 155 days, /pool/tdc3 is purged each week of files older than 90 days, and /pool/megascr1 is never purged.

    Finally, these disks are not backed up, but are protected by parity and hot-spare disks in the RAID arrays, including limited snapshotting of up to about a week.


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