On Thu, Nov 07, 2002 at 02:05:13PM -0800, Terry Lambert wrote: > Lukas Ertl wrote: > > how hard would it be to implement resizing of mounted filesystems? > > Currently, growfs requires the filesystem to be unmounted, and this is > > definitely a showstopper for FreeBSD when it comes to production use. > > > > I'd really like to promote FreeBSD more in my organisation, where we > > currently use mostly AIX, and I often hear (and have to say that it's > > true) that the AIX LVM is so robust, stable and quite easy to use. > > > > Could this feature be implemented once FreeBSD 5.0 is out with its > > filesystem snapshot? > > Nearly impossible, without a JFS. You would need to be able to add > new PP's to an LP, as you can do on AIX, or assign PP's to a "hog" > partition, and them provide each LP with "hog limits", so that they > can allocate PP's to themselves automatically, as needed, up to some > high watermark.
It is doable - just not done. E.g. Solstice Disksuite for Solaris does this. > The problem is that the allocation space is spread over all cylinder > groups, effectively as a hash. This is the same reason it is > recommended that you backup and restore to "defrag" when you run > "growfs". That's a performance reason. -- B.Walter COSMO-Project http://www.cosmo-project.de [EMAIL PROTECTED] Usergroup [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
