Hi,

Tony Schreiner wrote on 11.06.2007 at 15:38:45 [[BackupPC-users] RStmp]:
> General question:
> 
> What is the RStmp file used for during BackupPC backups?

from a quick scan of the code surrounding occurrences of "RStmp" in BackupPC,
it seems that for rsync transfers an uncompressed copy of any compressed
pool file > 16 MB that has actually changed is made in order to build the
new file with a minimum of bandwidth usage. This is necessary if unchanged
blocks of the file are detected in a different order than they appear in
within the file, because a compressed data stream is not seekable. I have no
idea why they *would* be detected out of order, but I expect the code would
not provide for this case if it couldn't happen.

> I have one Linux share, about  6TB uncompressed, over rsync, which  
> backs up nearly to completion, then BackupPC (3.0.0) spends 3-4 hours  
> repeatedly copying RStmp files to the base of the current
> 
> .../pc/<client>/new/f%2f<sharename>
> 
> the RStmp files are from 1 to 3 GB in length, and I have had no  
> success correlating them to an actual file.

It appears they end up in that directory for any file in the "share". So,
you're looking for files in the "share" between 1 and 3 GB (uncompressed
size) that have changed since the previous backup. You might look at the
contents ('file .../pc/<client>/new/f%2f<sharename>/RStmp' can give you an
idea what sort of file it is).

Hope that helps.

Regards,
Holger

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