trevellyan

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Posts posted by trevellyan

  1. Glad to hear you don't consider Sync to be a backup solution, my comment about that was meant to be general, not accusatory.

     

    As with most synchronization and backup solutions, when Sync periodically indexes a share, it only looks for metadata changes (times, sizes). Anything else would be too resource intensive. Sync only looks at the content when it's actually preparing to propagate changes. As long as bit rot doesn't affect the metadata, it won't propagate spontaneously.

     

    There are other solutions to the bit-rot problem involving the periodic generation of hashes on filesystem content - which is what ZFS has built-in.

  2. If your main purpose here is backup, I wouldn't go with BTSync. Although I'm a fan. Syncing is not the same as making a backup.

     

    Here here!

     

     

    I see my friends backup as one big encrypted file. So basically we provide eacht other storage, outside our homes.

     

    And you can set a storage quota for each peer.

  3. By the time you were actually running as a different user, Sync would be running again and keeping the files in Sync.

     

    First, recognize that each user has their own Sync database in ~Library/Application Support/BitTorrent Sync, which cannot be up to date for both users at the same time.

     

    Now imagine user A is logged in. Sync is running and files are changing, either because user A changed them or because they changed on another peer. Now user A logs out and user B logs in. Sync starts and discovers that files have changed while it wasn't running. This instance of Sync doesn't know that it was another instance of Sync that made the changes. Therefore, this instance of Sync has been presented with changes that occurred while it wasn't running. This is a bad thing.

     

    Even worse, imagine if you have fast user switching enabled. Now two instances of Sync could be fighting over the same folders at the same time. Yuck.