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23.12.1998 KOSOF  
28.7.1999 Finasta for NT  
8.7.1999 Landibase Enterprise Edition for Linux  
1.8.2000 Netsword for Linux / Solaris  
25.9.2000 Sydney application serwer  
21.12.2000 Landibase Enterprise Edition for NT    
25.3.2001Telskan for NT  

Netsword replication

Netsword like any other edition of LanDiBase class of database servers is out of the box equipped in replication. In one of the oldest html documents published in late 1996 LanDiBase was compared to a brain with its two hemispheres, and it should have been seen as a analogy to Landibase database server and replica server. In fact even in the oldest implementation of that idea the LanDiBase server is a cluster of three server, one main server and two replicas, all using LanDiBase protocol , which is rather standard asynchronous request/response protocol. How it works ? The main server after obtaining the request from the client , handles it appropriately depending on the nature of the request and at the same transfers the request to one or two replica servers.It means, that although three servers are very similar they sometimes perform different actions .The number of replicas , set as a default to two, is in principle arbitrary. The three servers can be located on one computer or on different computers. The LanDibase cluster can be even installed on the same computer as that of client. More, You can install many LanDiBase clusters on one computer. The replica server of one cluster can be shared among many Landibase clusters, so You can easily build the "neuronal" like networks. Netsword cluster differs from standard LanDiBase cluster in that it uses different protocol with clients and replicas, it means Netsword main server is a multiprotocol server.In many cases You will not need replicas , so You can easily switch off replication. Generally the function of replication is to serve as a backup and loadbalancing.