ServNET: cluster management June 2003

1
ServNET cluster management (June 2003)
RS-485 links up to 125 nodes, up to 1,000
meters Several links (equaling the number of
COM-ports) may be connected to the control
station.
2
ServNET simple hardware

• Single-sided board.
• One Atmel microcontroller
• Two Maxim chips (MAX232A ? MAX487)
• One chip for ferric RAM (FRAM) RAMTRON.
• Few auxiliary components.

3
ServNET functionality

• Selective node reset (SW groups).
• Selective switching on/off of nodes power supply
  (SW groups, also smooth, with a target latency
  between nodes).
• Access to the serial console of the node
  allowing...

4
Access to the serial console of the node allows
the following

• To change the parameters of the BIOS node.
• LILO select an OS to be loaded and the loading
  parameters of the Linux core.
• To execute any commands in a console regime.
• To monitor critical messages of the OS.
• To read several last console messages from the
  nonvolatile memory of the ServNET board after
  failure.

5
ServNET production

• Development PSI of RAS, Production Computer
  Research Institute, Minsk.
• A pilot lot of more than 200 items has been
  produced. ServNET has been installed in
• T-Forge32 (16 nodes).
• SKIF ?-500 (64 nodes) and other clusters in
  Minsk.
• Clusters in Pereslavl.
• Clusters in the Research Computing Center of the
  Moscow State University (58 ServNET boards).
• ServNET v.2 2004, developed by PSI of RAS and
  T-platforms, produced by T-platforms.

6
SKIF-ServNet v.2

• The size has become half as large (66 33 mm) if
  compared with the previous version.