I totally agree. I know that dm-multipath is opensource and if a feature is missing you can code it by yourself (!) but Red Hat is not opensource and could add it to (the top of) users wishlist.
Tom, why do you not subscribe to dm-devel and try to post a message for an update on this? I will follow and reply. Peraphs we'll get more attention. Thanks Domenico Viggiani > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Tom Sightler > Sent: Thursday, July 24, 2008 9:40 PM > To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list > Subject: RE: [rhelv5-list] RE: multipathing in RHEL5 > > On Thu, 2008-07-24 at 11:25 -0700, Collins, Kevin [Beeline] wrote: > > Aren't most people running LVM where you can just add a new > LUN, pvcreate and vgextend? > > I'm sure they are, but I believe that's a little bit of a > crutch that Redhat and other Linux developers are using to > try to make this seem less critical. > > Most storage arrays make it very easy to simply grow an > existing LUN on the fly and the OS needs to easily support > online growth of volumes in this case. That other OS from > Redmond has supported online growth in this way since, with > the exception of system volumes, since at least their 2000 > version. It seems a shame that Linux can't do it. > > Forcing admins to add LUN's to grow a volume removes from > them the ability to be more conservative and granular with > their expansions because otherwise they end up being forced > to manage a large number of LUN's even with a relatively few > systems. I have a couple of dozens servers that have been on > the SAN for 5+ years. They've probably had their volumes > grown and average of once a year in that time. If I always > added a LUN I would now have to manage 125 LUN's just for those > 25 servers for no reason other than it's the only way to grow > them online. > > It can also significantly complicate the implementation of > storage array based snapshots, especially on some platforms > that won't guarantee consistent snaps across multiple LUN's. > IMO, it's a feature that Linux really needs. _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
