stateless synchronization between two imap accounts I used to be an impasync user. But one day this piece of software had been removed from debian repos by its author. I'm now trying to find an alternative to imapsync. I currently paying a strong attention to offlineimap and mbsync.
I try to reproduce the same behaviour as in imapsync : stateless synchronisation between two imap accounts. One of these imap accounts is the master account, the other one is the slave account. The master account is the one that I use on a daily basis, as my main mail account. The slave account is juste a backup account synchronized from time to time from the master account. This solution make it possible to have a secondary backup mail account in case of hardware or software failure on the master account. It is even useful in case of accidental deletion of mails on the master account, which might be backuped on the slave account (if created before the last synchronization). The stateless statement is important for me, as I want to be able to synchronize my two imap accounts from various computers, even if I reinstall the system, leading to restart from a fresh install without cache data. If I consider a piece of software such as imapsync (for imap synchronization) or weex (for ftp synchronization), these softwares might use caching or not, they always have a "rebuild" mode that lead the software to build or rebuild its cache data. This is permitted by the fact that one account is the master and the other one is the slave. As there is no two-way synchronization, it is easy to rebuild the cache data. How does mbsync determine if a mail has been deleted from an account, or newly received from the other account ? I can't figure out if mbsync is a stateless or a stateful piece of software. As mbsync maintains a cache of all mails it knows, mbsync is in a way a stateful application, while imapsync is stateless. As imapsync does only a 1-way synchronization, it is easy for imapsync to be stateless : imapsync only has to compare mails from the two repositories and synchronize them considering that the original repository as the reference repository. Considering mbsync, what happens if the cached data of mbsync are deleted ? Can the synchronization be recovered ? In this case, how can mbsync determine if a mail has been deleted from an account, or newly received on the other account ? In my case, I use a one-way only syncrhonization. Is there a special way of rebuilding cached data ? As one of the repository is readonly, every mail deleted from this repository should also be deleted from the other repository. Does mbsync work like that ? ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk _______________________________________________ isync-devel mailing list isync-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/isync-devel
