Incremental replication test

Question

Dear Fellow members,

We've just started playing with Replistor. We plan to replicate office files among 12 sites in a circular replication manner.

The first thing we checked out is the incremental replication. The documentation is very foggy on how the application determines when to send a full copy of a file or sync only the changes. During our test we were simply not able to make the application preform a proper incremental sync. One of our test was to change a single character in a 5mb txt file.

The initial sync produced a 2mb actual transmission /due to the implemented compression/. After changing a single character in the file Replistor sent over the whole file again. Shouldn't it send only the changes??

Waiting for you kind answers,
Balazs

tribicic · Answer

Hello Balasz - there is a difference between syncing and mirroring (which is what happens after the specification is in sync). Incremental sync will always send the complete file over; incremental in this case means that it will not send over every single file, but only that have changes (it is the incremental sync of the specification, not the file!). Once the specification is in sync, mirroring starts - and mirroring replicates just the operations that are done on the files.
So the behavior you are seeing is expected, and sync is something that you should be doing rarely, or only once in ideal world.

lovasb1 · Answer

Dear Tomislav,Thanks for you answer. I figured out finally that mirroring and syncing are two completely different things. I'm afraid the documentation is quite poor on this topic..Thanks again,Balazs

Replication Manager

Incremental replication test

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