On 8/22/07, doxburger <[EMAIL PROTECTED]> wrote: > 2) I will need to update my RSync server on a regular basis. I have been > using rsync to send data to the rsync server (makes sense right?). Now and > then a user has been downloading from the rsync server, as I am updating the > data set, and they get a mix of the old and new update. This completely > breaks my application. How is this handled normally?
I recommend the following technique: 1. Upload each new revision of the module contents to a new directory. (You can --link-dest from the existing contents.) 2. Make a symlink that always points to the latest revision. Whenever you finish uploading a new revision, atomically overwrite the symlink to point to it. (Note: "ln -fs module.5 module" is not atomic; "ln -s module.5 module.tmp && mv module.tmp module" is.) 3. Specify the symlink as the module path in your rsyncd.conf . Each time the daemon gets a connection from a client, it will fork a server process which will chdir through the symlink into the latest revision of the module. Subsequent changes to the symlink will not affect the data seen by that connection. Once you are pretty sure that no open connections are using an old revision of a module, you can delete the revision. If you like, you can set up a special module on the daemon with pre-xfer and post-xfer commands to carry out this technique and then just upload to that module. Matt -- To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
