Giant Meterwave Radio Telescope
There are many compuers on GMRT network with few of them are on NIS and are located in Control Room, Terminal Room and Computer Room. They are maintained by system and network administrator.
More General Information about Computers at GMRT
- The NIS machines and their architecture are:
- Linux : krithika, astro1, astro2, astro3, astro4, astro5, astro6, astro7, gtac1, gtac2, gtac3, gtac4, astro0.
- Solaris: anuradha
- Apart from these, there are computers for antenna and electronic system parameters (ONLINE) control and monitor, correlator and pulsar hardware control and monitor purposes which are not on NIS. The telescope operators knows about their usage for the observatory operations.
- System backup is taken by system administrator while observatory data backup is taken by the telescope operators.
- Network Printers:
- npgcc : HP LaserJet 2300. Placed in Terminal room.
- nptcc : HP LaserJet 5100 . Placed in computer room.
- npcp : HP LaserJet 4600 . Placed in control room.
- psgcc : HP LaserJet 2300. Placed in GCC for 'callsheet' program purpose and GCC usage.
- All printers are visible from computer krithika.
- Tape Drives: Computer name and device name:
- gtac1 : /dev/nst0 : A DAT72 dattape drive.
- astro6 : /dev/nst0 : A DDS3 dattape drive.
- proj2 : /dev/nst0 : A DDS3 dattape drive.
- proj3 : /dev/nst0 : A DDS3 dattape drive.
- mithuna : /dev/nst0 and /dev/nst1: Two DDS3 dattape drives.
- The observatory uses default block size of 1024 bytes.
- Also, some important points to note:
- gtac1, gtac2, gtac3, gtac4 are the computers reserved for GTAC users where locally disk /analysis is available for visitorX account.
- gtac1, gtac2, gtac3, gtac4, astro1, astro2, astro3, astro4, astro5 machines to be given priority for astronomical data analysis.
- Local AIPS is available on astro1 to astro7 and gtac1 to gtac4 computers.
- For interferometry data, recording is done on machine mithuna where data area is /rawdata and on machine mithunb with area as /rawdata1 and both cross mounted on all NIS machines.
- Observatory data files ( lta files) and FITS files of capacity approximately 10 to 11 GB can be stored on a DDS3 dattape using tar.