Re: Data Replication Implementation

datamas wrote: } } At 10:29 24/04/97 -0400, you wrote: } >datamas wrote: } >> } >> Hi Friends, } >> } >> I am having two HP machines } >> } >> 1. HP K200-Production System, Dual Processor, 196 MB RAM } >> } >> 2. HP 827-Disaster Recovery System, Single Processor, 128 MB RAM } >> } >> By any chance is it possible to go for Data Replication. Informix ver is 7.x } >> DSA on both the machines and O/S is also same. } >> } >> Any comments will be highly appreciated. } >> } >> Regards } >> Sanjeev } > } > } >It is hard to answer, which version of DSA do you have?? } >Informix DSA 7.22 or above manage CDR Replication, and the } >prior versions use HDR Replication, both configurations are diferent. } > } >Regards, } >Javier Puente } > } } Hi Javier, } } Thanks for your reply. } } Could you pls tell me the difference b/w CDR and HDR. Why there are two } different terms for the same activity? } } I would appreciate your efforts for the same. } } Regards } Sanjeev Hi, there is big different between both. HDR (High Avalability Data Replication) is a data replication of a complete system. That means a replication between a copy of entire engines. For this, exists a primary and a secondary, the primary is the server than will replicate all the activity to the secondary , the key of this fact resides in the use of logical logs (than will be replicated also). For a detailed explanation of this configuration, use the Informix Online Dynamic Server Administrator Guide chapter 29-30. CDR on the other hand, is the new way to perform replication, that means that you can replicate just a database or table from an engine to another engine(s). This scheme brings a flexible way to replicate data. In conclusion, HDR is replication of entire engines and CDR is replication of databases or tables as you prefer. The CDR appears since version 7.22, I would like to know what version do you have???? Regards, Javier Puente Corporacion Noboa