Re: weak checksum

2009-09-28 Thread Julian Pace Ross
OK.. didn't notice adler32 wasn't rolling... The reason I was asking is this: this is from the rsync code: /* a non-zero CHAR_OFFSET makes the rolling sum stronger, but is incompatible with older versions :-( */ #define CHAR_OFFSET 0 Anyone knows exactly what an ideal value for CHAR_OFFSET is?

Re: LVM snapshots vs. --link-dest

2009-09-28 Thread Andrew Gideon
On Sun, 27 Sep 2009 17:14:42 +, Andrew Gideon wrote: I was thinking that an alternative to links, which do nothing to preserve space when small file changes have been made, would be using LVM snapshots. Instead of creating a new directory for a new backup, and specifying --link-dest to

Re: LVM snapshots vs. --link-dest

2009-09-28 Thread Paul Slootman
On Mon 28 Sep 2009, Andrew Gideon wrote: The --update option is also useful in this regard? What would happen if --inplace were used but --update were not? --update only influences what files are considered for transfer, not how that transfer is performed; hence it is completely irrelevant