On Friday 16 December 2005 15:47, Ian Smith-Heisters wrote: > Hi all, > > I just read about COW, and wish I'd known about them when I first setup > my servers. Now I have several UML rootfs based off of a single original > rootfs, which I mirrored just by copying. Is there any way I can > retroactively create a COW from the modified rootfs and the original > rootfs? Sort of like doing a diff? Can uml_mkcow do this?
> Thanks, > Ian There's no such tool currently - however it can be coded in a relatively easy way inside Uml. ubd0=another_root_fs ubd1=new_cow_file,orig_one ubd2=modified_one open /dev/ubd1 open /dev/ubd2 compare block by block (512-byte blocks) the two files replace the ubd1 block with ubd2 one when they don't match. finally, ubd1 will match ubd2 but on ubd1 the changes have been made on the COW file. -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
