2.1 The Server Architecture

Fig. 1 shows an overview of the SMA on-line archive server architecture. The visibility data produced from the SMA correlator (Crates) along with the ancillary data is transferred via RPC to the data computer Smadata (Sun Ultra 60/Solaris). Smadata is a central host in which almost all the post-correlator data processing in terms of real-time correction, flagging, formating and archiving does occur. In addition, this data computer also hosts the Sybase SQL server, Replication server and the HTTP server.

 

Figure: 1. The SMA Archive Server Architecture. The host computer is SMADATA, Sun Ultra 60 /Solaris. The RDBMS is Sybase. The JDBC utilizes jConnect from Sybase. This configuration is for the primary site currently located on the top of Mauna Kea. This system will be moved to the SMA headquarter in Hilo. There already exits a dedicated network link (45Mb/s) between Mauna Kea and Hilo. This system can be shared by SMADB and other SMA databases, such as DERSDB, DOCDB etc..