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My Weekly Bodyweight Fitness Training Program (September 2020 Update)

Hello, (You can skip the text and go straight to the program below.)Goal
My goal is to do 1 strict pull-up. I am currently doing pull-ups by starting almost with my arms straight, but it is not strict form, since the arms are almost (but not fully) straight. So that's the goal. At least, I am not doing the swing pull-ups that CrossFit people do (kipping pullups or butterfly pull-ups).
I started my training with this goal in mind on 2020-07-16 with the target date 2020-09-17. I got this idea of the pull-ups goal when I saw the older Jujimufu on YouTube. I was watching Jujimufu on trickstutorials.com in the early 2000s when he was less of a bodybuilder. He is a legend.
I think that I will reach the 1 reps of a perfect strict-form pull-up around 2020-10-15. My program is pure bodyweight fitness training. I like it that way. It's fun and simple.
Push Pull Legs (PPL)
During July and August 2020, I was basically training every 2 days with pull and push exercises and no legs exercises. Ev…

Adding ZVOL VIRTIO disks to a guest running on a host with the FreeBSD BHYVE hypervisor

On atlantis.domain (my FreeBSD BHYVE hypervisor host), I use these commands:

Install FreeBSD on a 10G disk.

vm create -s 10G guestname

vm install FreeBSD-12.1-RELEASE-amd64-memstick.img

vm console guestname

Add 8 30GB zvol-based disks

vm add -d disk -t zvol -s 30G guestname
vm add -d disk -t zvol -s 30G guestname
vm add -d disk -t zvol -s 30G guestname
vm add -d disk -t zvol -s 30G guestname
vm add -d disk -t zvol -s 30G guestname
vm add -d disk -t zvol -s 30G guestname
vm add -d disk -t zvol -s 30G guestname
vm add -d disk -t zvol -s 30G guestname

You will need to do

vm poweroff guestname
vm start guestname
because the guest does not seem to see the 8 30GB without power cycling. (rebooting won't work)

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If you want the boot disk (the one create by "vm create") to be a zvol, you must edit the template:

root@atlantis:~ # zfs snapshot tank/vm-bhyve@2020-06-11-2145

root@atlantis:~ # mount -t zfs tank/vm-bhyve@2020-06-11-2145 /tank/vm-bhyve@2020-06-11-2145

root@atlantis:~ # vim /tank/vm-bhyv…

Changing the capacity of each VDEV in a ZPOOL without losing data and no downtime with ZFS

Before we start, let's define some acronyms.

FreeBSD: FreeBerkeley Software Distribution
ZFS: Zettabyte File System
ZPOOL: ZFS POOL
DEV: DEVice
VDEV: Virtual DEVice
GEOM: disk GEOMetry
BHYVE: BSD HYperVisor
ZVOL: ZFS VOLume

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I have been tinkering with FreeBSD, ZFS, GEOM, BHYVE, and other interesting technologies.

***

Let's experiment on how to change the capacity of each VDEV of a ZPOOL without losing data and no downtime with ZFS.

To do so, you need a set of disks that are bigger.
Example, if the ZPOOL has 2 mirror VDEVs with 2 10GB disks each (total: 4 10GB disks), and you want to upgrade to 20 GB disks, than you need 4 20GB disks for the upgrade.


Figure 1: Live upgrade of disks in a ZPOOL

ZPOOL tank                           ZPOOL tank
    VDEV mirror-0                        VDEV mirror-0
        DEV /dev/vtbd1                    DEV/dev/vtbd9
        DEV /dev/vtbd2    --->         DEV/dev/vtbd10
    VDEV mirror-1                       VDEV mirror-1
        DEV /dev/vtb…

A new beginning in computational geometry

It has certainly been a while since the last post was published on this blog.

At the beginning of year 2019, I somehow started to reflect on my career, where I was, and where I wanted to go in my journey. At the end of 2019, I decided to look for new opportunities, after spending more than 4 years doing software development in bioinformatics at Gydle.

I was mainly looking for a new job where the computational aspect that I liked would still be a thing. I wanted also a sizable team, in order to be in an environment with social interactions. I wanted a workplace that values great software development tools and best practices. Finally, I wanted something that was not totally disconnected from what I did so far in life. That thing I did so far in life is the frontier between biology and computer science.

On 13 January 2020, I started to work for Bodycad. Bodycad aims at "The Pursuit of Orthopaedic Perfection". In a nut shell, Bodycad designs and manufactures personalized patient…