On Thu, Jun 25, 2009 at 10:09, Chris Hoogendyk<hoogen...@bio.umass.edu> wrote: > > Gone are the days when you totally avoided upgrades because of the time, > hassle and risk involved.
Time and hassle, maybe. Risk, no. Risk is not a binary, it's a balancing act. Live updates don't remove risk, they simply alter the risk balance. There will always be applications and environments where risk is high enough that will cause you to wait. For example, your 2 minutes of downtime... on wall street that could cost you millions of dollars of stalled or canceled transactions. (well, not lately, but before the crash...) So, your CFO will ask you: is the risk of upgrading vs not upgrading worth a couple million dollars? If the upgrade isn't worth it, then they will likely choose to avoid it. Like I said "if isn't broken, don't upgrade", which translates to "don't upgrade until the cost of not upgrading exceeds the lost revenue of your outage window". (and redundant systems may OR MAY NOT mitigate that)