On 23.07.2010 00:30, Tom Christensen wrote: > > I am running rsync in cygwin on windows. I am attempting to backup a > somewhat large data store (750GB) to a remote site. As its windows > and preserving permissions exactly is important, I have an iSCSI drive > mounted on the local system across a somewhat slow WAN link (IE, it > would take about 3 months to copy the datastore over it). > Unfortunately, since this appears as a "local" copy to rsync, it > always copies whole files. Even though it is a "local" copy, I want > to only send diffs, as we have large files that have small changes > daily. Reading the man page, and everything I can find on the net I > don't see an option to force diffs only/rsync protocol, is this > possible?
You have an abstraction error here, an iSCSI device is just a bit-bucket like any localy connected HDD in that all filesystem and data processing is done on the local side and raw block-data is send over the WAN. You would have to run the other side of rsync on the machine that provides the iSCSI-Device. For that to work the remote-machine would have to mount the filesystem localy which in most cases means you would have to unmount it from your Windows machine. This is because, except for cluster-filesystems or a filesystem that is mounted read-only (on every machine!), a given fileystem can only be mounted on 1 machine at a time. Bis denn -- Real Programmers consider "what you see is what you get" to be just as bad a concept in Text Editors as it is in women. No, the Real Programmer wants a "you asked for it, you got it" text editor -- complicated, cryptic, powerful, unforgiving, dangerous. -- Please use reply-all for most replies to avoid omitting the mailing list. To unsubscribe or change options: https://lists.samba.org/mailman/listinfo/rsync Before posting, read: http://www.catb.org/~esr/faqs/smart-questions.html
