I want to be able to make periodic backups of objects from one folder to another automatically; I would like to back up modified objects in one folder periodically to another nearly identical folder mounted on an external ODB via ExternalMount and ZEO. I've never considered what it would take to copy an object from one place to another, so I had a few questions:

- Is the best solution just to take the _getObject() from folder1 and do a _setObject() in Folder 2? - How reliable is bobobase_modification_time for using to determine object modification time in Folder1? - Related to the above, might it work to wrap backed-up objects with an extra property containing the original mod time on the object when it lived in Folder1 as a means of comparison? The other thought I had was to figure out a way to get an MD5 or SHA hash for the object, but I figure that doing this on a folder with thousands of objects might be a total waste of CPU... - Any other thoughts?

Sean, this might not be what you need, but perhaps it's worthwhile anyway. Instead of periodic backups, can't you just use a special object manager for that folder which you want to backup? For instance, override _setObject to instead of just doing it's stuff on self, doing it also on your backup storage. Take %Y%Y%Y%Y%M%M%D%D as the destination folder id (autocreated) and you have your weekly archive. If these destination folder are transparent to acquisition, you could also have the same behavior as the original folder, while having all weekly revisions of your objects. Ok, I admit it, I didn't answer any question. cheers, oliver