Data loss, thanks to buggy driver or hardware

So this happened on the 3rd, on one of my systems Feb 3 03:02:39 calculon kernel: [195271.041118] INFO: task kworker/20:2:757 blocked for more than 120 seconds. Feb 3 03:02:39 calculon kernel: [195271.048116] Not tainted 4.20.6.nlytiq #1 Feb 3 03:02:39 calculon kernel: [195271.052678] “echo 0 > /proc/sys/kernel/hung_task_timeout_secs” disables this message. Feb 3 03:02:39 calculon kernel: [195271.060626] … Read moreData loss, thanks to buggy driver or hardware

Reflections on where we’ve been in HPC, and thoughts on where we are going

Looking back on past reviews from 2013 and a few other posts, and what has changed since then up to 2019 (its early, I know), I am struck by a particular thought I’ve expressed for decades now. In 2009 I wrote HPC has been moving relentlessly downmarket. Each wave of its motion has a destructive … Read moreReflections on where we’ve been in HPC, and thoughts on where we are going

A bug in s3 buckets with no apparent way to request support to deal with it

This is a fun one, I’ve been playing with for the last 5 days or so. I’m helping someone out with backups, and they changed their mind on what they wanted backed up. So I started deleting the backups they didn’t want. One of the machines contained a set of directories for hashdeep which includes … Read moreA bug in s3 buckets with no apparent way to request support to deal with it

OT: things taken for granted, and relearned

Sleep is the great rejuvinator. When you get good sleep, you feel generally much better when you wake up. Your body does repair functions, your brain works out (some issues). And occasionally you dream.
Going without sleep ages people, makes them less productive as they are more tired during the day. It limits the repair functionality. It hinders the “work through problems”. It prevents dreams.
Pulling all-nighters is one instance of doing without sleep. This is a voluntary effort.
But what if your efforts were non-voluntary? What if your lack of restful sleep was prolonged for, I dunno, 20+ years.
I have a severe case of Obstructive Sleep Apnea (OSA). I’ve had it for a while … my wife diagnosed it perfectly, some years ago, after reading the symptoms and comparing to her observations. I didn’t believe her.
Word to the wise. Listen to the boss lady.
I’ve not been getting good sleep for a while. Years … no … decades. I used to attribute it to one of my other oh-so-enjoyable maladies. In this particular instance, one is awakened to the nasty sensation of your vocal cords and esophagus burning, choking and inability to breath a highly acidic slurry … Yeah, that, kidney stones, and Gout are all things I have that I really don’t wish on anyone.

Read moreOT: things taken for granted, and relearned