Re:Command-line tools can be faster than a Hadoop cluster (2...
by mlyle on Thursday January 30, 2020 @03:35PM
(#22195258)
Sure, this is typical of well-run environments.
But you probably don't yank power on critical things mid-load after making a trivial change. Excessive testing breeds its own risks.
But it's really, really easy to gank up a trivial change now and then.
In the past 10 years, I've been woken up three times. One was from third-party software having a certificate that we didn't know about expiring; one was from a very important RAID set degrading and failing to auto-rebuild to the hotspare (it was RAID-10, so didn't want to leave it with a single copy of one stripe any longer than necessary); and one was from a bad "trivial change" that actually wasn't. I don't see how you can get to a rate much lower than this if you are running critical, 24x7 infrastructure.
But you probably don't yank power on critical things mid-load after making a trivial change. Excessive testing breeds its own risks.
But it's really, really easy to gank up a trivial change now and then.
In the past 10 years, I've been woken up three times. One was from third-party software having a certificate that we didn't know about expiring; one was from a very important RAID set degrading and failing to auto-rebuild to the hotspare (it was RAID-10, so didn't want to leave it with a single copy of one stripe any longer than necessary); and one was from a bad "trivial change" that actually wasn't. I don't see how you can get to a rate much lower than this if you are running critical, 24x7 infrastructure.