Does ZFS have a feature that allows diffs to be placed another space? This would be valuable to Xen clients where all the clients are booted off the same golden master.
Jim On Jan 31, 2007, at 8:12 AM, Dave Miner wrote: > Moinak Ghosh wrote: >> Dave Miner wrote: >>> Alan DuBoff wrote: >>>> On Monday 29 January 2007 03:30 pm, Dave Miner wrote: >>>>> [...] >>>>> with our read-only /usr for diskless clients. God knows the >>>>> Live Media >>>>> project would be a lot easier if we already had this ;-) >>>> Dave, >>>> >>>> The way I think about this, Gnome would still be able to update / >>>> usr, given root access, just that it would be laid over the top >>>> of what was a read-only FS. A user might still need to change a >>>> file/binary, sendmail being the classic example I 'spose. >>>> >>>> In this scenario, you would always be guaranteed to have a clean >>>> bootable filesystem, since it is treated as a ROM. Only that it >>>> can actually be updated. >>>> >>>> I suspect this wouldn't be a simple project, it would take some >>>> thought. >>>> >>> No question about that. I'm pretty lukewarm on this sort of >>> UnionFS approach, though; it seems to add layers of complication >>> and cost without a counterbalancing level of improvement. And >>> I'm really unclear on how well such an approach would interact >>> with our desire to move decisively to ZFS as our primary file >>> system and leverage snapshots and clones for the operations which >>> they obviously would benefit. >> Most of the UnionFS features like snapshots overlap with ZFS >> and ZFS does a much >> better job of handling those. The only benefit of using UnionFS >> would be in the area >> of Install/Live media where a minimal UnionFS port will >> suffice. Compare a ramdisk >> just 10-20MB in size vs the current 256+ Meg. > > Sure, I totally agree that it's useful there, at least as a > workaround, though I think we could make an extremely viable > solution without UnionFS were we to look at the system architecture > with this usage model as a requirement. > > Dave > _______________________________________________ > install-discuss mailing list > install-discuss at opensolaris.org > http://opensolaris.org/mailman/listinfo/install-discuss
