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Hardware replication and DBISAM |
Wed, Apr 4 2007 8:45 AM | Permanent Link |
"Jose Eduardo Helminsky" | Tim
One of my customer is starting to implement a hardware replication (two servers, same manufactor, same model, same features). The application is running in C/S mode (4.22 build 4) My doubts: 1) Do I have to install DBSRVR on both servers ? 2) What about the performance ? 3) Do I have to deal with different issues when programming ? Eduardo |
Wed, Apr 4 2007 5:43 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Eduardo,
<< One of my customer is starting to implement a hardware replication (two servers, same manufactor, same model, same features). The application is running in C/S mode (4.22 build 4) My doubts: 1) Do I have to install DBSRVR on both servers ? >> Well, if you want to simply switch over to the new server immediately and have everything keep on running, then yes, it will need to be installed on both. << 2) What about the performance ? >> The only performance issue that I can see is how fast they can replicate the data over from one server to the other. How do they intend to do so ? Are they using a hot-backup software package on the servers ? -- Tim Young Elevate Software www.elevatesoft.com |
Thu, Apr 5 2007 3:53 PM | Permanent Link |
"Ralf Mimoun" | Jose Eduardo Helminsky wrote:
> Tim > > One of my customer is starting to implement a hardware replication > (two servers, same manufactor, same model, same features). The > application is running in C/S mode (4.22 build 4) > > My doubts: > 1) Do I have to install DBSRVR on both servers ? > 2) What about the performance ? > 3) Do I have to deal with different issues when programming ? That all depends on the replication system the customer will use. Some systems simply mirror everything to the backup system. Both will be in exactly the same state all of the time until one system goes down. Normally, the servers have dedicated network cards for that, high speed etc. In such a scenario, the "normal" software running on such a system does not have to know anything about that replication. It will be replicated, too. Ralf |
Thu, Apr 5 2007 5:06 PM | Permanent Link |
"Jose Eduardo Helminsky" | Tim and Ralf
Thank you for both. Eduardo |
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