Virtualization is in the air around here, partly as a way of beingenvironmentally friendly; fewer physical machines means less power andheating and so on. Now, I'd like to be environmentally friendly, but oneof the issues with virtualization is that getting into it for anythingimportant has significant startup costs.

One of the reasons we run different services on different machines tostart with is for fault isolation, so we don't have all of our eggsin one basket. Virtualization reverses that; if you lose

The fundamental problem with Solaris 10's current version of ZFS in aSAN failover environment is that it has no concept of locking or hostownership of ZFS pools; instead, ZFS pools are either active (imported)or inactive (exported). So, if a host crashes and you want to failover its ZFS pools, the pools are still marked as active, which meansyou must force pool import, which has catastrophic consequences if something ever goes wrong.

But it gets worse. Because hosts don'

Tabs versus windows is one of those eternal debates (well, now thatwe can have the debate at all). For a long time I was strongly on thewindow side, to the point where I didn't use tabs in Firefox at all, butI've recently relented a bit on my dislike.

For me, the core difference between the two is that windows can overlap,can be moved independently, and can be organized freely (in twodimensions). Tabs are inherently non-overlapping,