Google SoC idea

[Ivan Voras]

Scott Long wrote:

> An alternate SoC project that would be very useful is block-level 
> snapshots.  I'm not sure if I'll be able to retain the filesystem 
> snapshot functionality in UFS with journalling enabled, so moving to 
> doing the snapshots in the block layer would be a good way to make up 
> for this.  Beware that while the GEOM transform would be pretty 

One addenum that was introduced after I made the post to hackers@, but 
before sending a proposal to Google (PHK's idea, actually) is to 
implement a delayed-commit mode, in which journaled data will not be 
commited until requested.

This would allow something like block-level snapshots, but one-shot only 
(or at least one per journal).