Thanks. The article confirms what I suspected when Jobs first described Time Machine: It's a *lot* like Dirvish, as you can see from the description here:
http://edseek.com/~jasonb/articles/dirvish_backup/snapshot.html<http://edseek.com/%7Ejasonb/articles/dirvish_backup/snapshot.html> Why Apple has to call hard links multi-links I don't know. I also didn't know HFS+ didn't support hard links. py On 10/15/07, Tom Piwowar <[EMAIL PROTECTED]> wrote: > > This is a long article and the first part is a history of backup > strategies (something not everyone will find interesting). However, after > that it goes into a lot of detail about "Time Machine." This is a big > deal for Apple and they have invested a lot in making it work by making a > very interesting change to how its file system works. They have created a > new type of alias (shortcut) that keeps a file around as long as any one > of these new pointers exists and lets them stack up multiple instances of > the same file. This allows them to make many snapshots of your files > while automatically eliminating duplicates. Very interesting. > > > http://www.appleinsider.com/articles/07/10/12/road_to_mac_os_x_leopard_time > _machine.html > > > ************************************************************************ > * ==> QUICK LIST-COMMAND REFERENCE - Put the following commands in <== > * ==> the body of an email & send 'em to: [EMAIL PROTECTED] <== > * Join the list: SUBSCRIBE COMPUTERGUYS-L Your Name > * Too much mail? Try Daily Digests command: SET COMPUTERGUYS-L DIGEST > * Tired of the List? Unsubscribe command: SIGNOFF COMPUTERGUYS-L > * New address? From OLD address send: CHANGE COMPUTERGUYS-L YourNewAddress > * Need more help? Send mail to: [EMAIL PROTECTED] > ************************************************************************ > * List archive at www.mail-archive.com/computerguys-l@listserv.aol.com/ > * RSS at www.mail-archive.com/computerguys-l@listserv.aol.com/maillist.xml > * Messages bearing the header "X-No-Archive: yes" will not be archived > ************************************************************************ > ************************************************************************ * ==> QUICK LIST-COMMAND REFERENCE - Put the following commands in <== * ==> the body of an email & send 'em to: [EMAIL PROTECTED] <== * Join the list: SUBSCRIBE COMPUTERGUYS-L Your Name * Too much mail? Try Daily Digests command: SET COMPUTERGUYS-L DIGEST * Tired of the List? Unsubscribe command: SIGNOFF COMPUTERGUYS-L * New address? From OLD address send: CHANGE COMPUTERGUYS-L YourNewAddress * Need more help? Send mail to: [EMAIL PROTECTED] ************************************************************************ * List archive at www.mail-archive.com/computerguys-l@listserv.aol.com/ * RSS at www.mail-archive.com/computerguys-l@listserv.aol.com/maillist.xml * Messages bearing the header "X-No-Archive: yes" will not be archived ************************************************************************
