-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 clint woodrow wrote: > > Matthias Meyer wrote: >> rsync(d) transmit only changed parts of a file >> (http://www.samba.org/rsync). e.g. a 2.6 GB mailbox.pst and receive >> one new mail at sunday. rsync will only transmit this one new mail. >> >> >> And you need a client on windows side. You can use cwRsync or rsync >> within a cygwin environment. >> >> br Matthias > > > Thanks for the details Matthias. I was wondering if one of you could > confirm something else for me. We've been testing BackupPC for the > last few months. The local backup server is up and running great and > we're getting ready to put up an offsite backup server for redundancy > and offsite security. > > Up to this point, I've assumed I wouldn't be able to roll PSTs into > the backups because they'd be too large to send over the limited > bandwidth every night and that they'd take too much space in the > pool. From what Matthias has said, it looks like as long as we have > the initial backup, subsequent backups shouldn't take nearly as long > since rsync is sending changes only. Can I also take from this that > BackupPC won't be storing full copies for every backup? i.e. If the > user has a 1 GB pst and adds one message of 2k, the pool requirements > are only 1 GB + 2k, not 2 GB + 2k?
No, rsync handles the transfer, so you will only transfer (approximately) 2k for the changes. (Obviously there are additional overheads for the non-changed sections, but they are very small). However, once backuppc has the whole new version of the file, it will add this 1.002G file to the pool, so the pool will consume 2G + 2k. Of course, if you use compression, then the size of the cpool will be smaller depending on how compressible your pst files are. Hope this helps. Regards, Adam - -- Adam Goryachev Website Managers www.websitemanagers.com.au -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkol8S0ACgkQGyoxogrTyiW+agCgh479PTPHXyhaokX8kvmAhoi4 ODcAn2bfjO9x2+MW0OgHwIKGKG8+jNoj =xJd3 -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ OpenSolaris 2009.06 is a cutting edge operating system for enterprises looking to deploy the next generation of Solaris that includes the latest innovations from Sun and the OpenSource community. Download a copy and enjoy capabilities such as Networking, Storage and Virtualization. Go to: http://p.sf.net/sfu/opensolaris-get _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
