[Quoting repaired] On Apr 20 2015, Viktor Szépe <[email protected]> wrote: > On Saturday, April 18, 2015 at 10:53:05 AM UTC+2, Viktor Szépe wrote: >> >> Is there a way to upload only changed file, thus doing incremental backup? >> My usecase is making backup of a website that has 1 or two new files per >> backup. > > Excuse me that was a wrong question. > The right one is: Will s3ql read the file's contents to determine whether > it has change or reads only the file's metadata (mtime, size etc.)?
I don't think that's the right question either. S3QL is a file system. When a client application (like your backup program) tells it to write data to a file, it checks if it already has identical data stored and (if so) saves only one copy. There is no way for S3QL itself to compare mtime and size. S3QL does not know when a file has reached its "final" size or mtime, and the mtime is the time of last write, i.e. when S3QL receives a write request it is always the current time. Finally, S3QL also has no idea which other file to compare any of this against. What you want is a feature of the backup program. For example, if you use rsync it will only copy a file if its attributes have changed. Look at http://www.rath.org/s3ql-docs/contrib.html#s3-backup-sh for an example. Best, -Nikolaus -- GPG encrypted emails preferred. Key id: 0xD113FCAC3C4E599F Fingerprint: ED31 791B 2C5C 1613 AF38 8B8A D113 FCAC 3C4E 599F »Time flies like an arrow, fruit flies like a Banana.« -- You received this message because you are subscribed to the Google Groups "s3ql" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
