I know this is a delicate topic which must be approached cautiously. Let's have a server which feed data to multiple slaves, usually using direct online connections. Now, we may want to allow those client to sync the data to a local replica, work offline and then resync the data back to the server. Which is the easiest way to approach this problem? Can you address me to tools, documentation, tech reference or other resource on this topic? I've found people talking about Slony-I, what can you tell me on this tool? Are there other tools? Moreover, additionally to the previous question, let's take the case i do have multiple indipendent and separate server and then i want to upload the information of these server (actually not everything but a subset of the data) to another server (here we have a unidirectional comm, as opposed to previous bidirectional comm and we have asymmetric structure as opposed to the previous exact replica), what are the tools, documentation, best practices or other resources to approach this problem? Thank you!
