>>>>> Dave Kempe <[EMAIL PROTECTED]> >>>>> wrote the following on Thu, 29 Sep 2005 09:02:49 +1000 > Hi, > I am trying to get rdiff-backup 1.0.1 going on cygwin. I will have a > windows package built shortly, but I would love it if windows-> windows > backups worked. > the initial backup works ok, but after the session stats are printed at > the end I get an error similar to the one below. Thats fine, but > subsequent backups crash with the error below before copying any files. > I think os.fsync is not available on cygwin python2.4 and is erroneously > turned on... > > Let me know if there any other information you need to help me out - is > there some way I can turn off fsyncing on cygwin?
rdiff-backup needs some way to order writes. For instance, when updating it sometimes needs to make sure a file is fully written before it is moved. Many optimized file systems will mess with the order of these operations for better performance (at least this is what the ext2/3 people told me). So without fsync, how can rdiff-backup be guaranteed everything is written in the right order? It would be easy to add a check and then just disable fsyncing if it's not available, but I don't think this would be entirely safe. -- Ben Escoto
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