What happens if...

[bertalanimre]

Hey Andreas,

Awesome trick you've done here. May I ask you what would happen in the following situation?

I wish to do a 2-way-file sync between two NFS servers. Now for this I could use only your watcher, but I would like to use something that is a bit more sophisticated than triggering scp commands. I was thinking about unison. Easy to use and easy to set up, and still does a pretty good job. However I want to trigger it with watcher and on file create events.

Now I want an upload folder to be watched and clone the files to the other backup server when they are uploaded. What happens with the following event line?

• User starts uploading a 2 GB file
• My webapplication starts receiving the file and creates it in the uploads folder
• A file is created but obviously with not all the data yet.

My question is: Is watcher going to get triggered by this broken file as well or it is intelligent enough to wait until the upload is finished? If not, then....

• User uploads the file
• The webapp, when the upload is ready, can copy the file to a different folder
• Watcher can watch that different folder and when the file is copied then it can trigger unison

What do you think? Is the first method working or am I forced to use the 2nd option?

Thanks in advance!

Bert