wishful feature: zfs splitfs

Example:
I have a tank/data filesystem, with my important "stuff" in it, including /tank/data/oracle and /tank/data/webcontent. This is a production system, so I can't shut down to move the data around. I need to quota off the web content so it doesn't run Oracle out of space.

So what I'd like to do is...
zfs splitfs tank/data/webcontent
zfs set quota=5g tank/data/webcontent

Conceptually, it seems simple enough. Just create the appropriate new zfs filesystem entries in the pool with its root inode pointing at an existing directory. No data copying necessary.

Unfortunately, I think it would not work because there may be open files on the new (-ly partitioned) filesystem, so the (fsid,inode) pair on those open files would have to be changed to be (newid,inode) on all processes. Atomically. As part of the update to the zpool metadata. Or else the kernel would have to be able to realize that the same inode is referenced by two different filesystems. :(

--Joe

Installing SunCluster

We've bought into Sun Cluster (AKA Java Availability Suite), and it's my job now to install it. I have 3x SunFire V490s, 32G memory each, 4 physical CPUs (8 cores), each has a quad-gig card (plus its 2 onboard nics) and a dual-port SAN card.

Solaris 10 update 4 (08/07). Sun Cluster 3.2.

Notes on the installation:

So far, it's been pretty straightforward except when I was trying to create the cluster. When it rebooted the first node, it never noticed that the node had rebooted in cluster mode.

This is because the rpc/bind (portmap) service is set to only allow local connections out of the box. A quick "svccfg network/rpc/bind setprop config/local_only=false" (on all nodes) and cluster is now up and running.

Bug opened.

--Joe