Notes

I am one of those people who function better by writing things down. One day, I realized that most of my notes don’t have to be private, so here they are - my second brain. Be warned that, if you stumble upon something here that doesn’t make sense to you, it isn’t meant to!

Sync Proxmox's native backups to rsync.net

Proxmox has an in-built backup system which is different from Proxmox Backup Server (which I now use). Once setup, I used a script similar to the following to sync the backup files to rsync.net: #!/bin/bash if [[ $1 == "backup-end" && "${DUMPDIR}" ]]; then SOURCE_FILE=${TARGET} TARGET_FILE="proxmox-server-backup/$VMTYPE-$3" echo "Will now upload to rsync-net: $SOURCE_FILE to $TARGET_FILE" ssh [email protected] rm $TARGET_FILE rsync -azPH $SOURCE_FILE "[email protected]:$TARGET_FILE" curl -m 10 --retry 5 https://hc-ping.com/ktUIh79JnI51jskrZE6UgA/$3/$? fi Other resources: Example hook script here: /usr/share/doc/pve-manager/examples/vzdump-hook-script.pl I had to setup the hook script here: /etc/vzdump.conf.

Rust book

Two main on stack vs heap: For pushing something on stack, you need to know size upfront (during compile time). So, any object that can change size needs to go on heap. Primitive data types (such as int) remain on the stack? Accessing heap memory takes more time as you need to follow a pointer. The term “memory allocation” only applies to heap. Variables move (for those allocated on heap) and copy (primitive types). ...

Workout tracker

Accessories Machine incline press. 50 total, can see 2-3 lines below. Seated rows. Seated leg curls. Do YWTs. Equipment Incline dumbbell press: Back, I can see 2 holes on top. Front also, I can see 2. 50 total next time. Hammer curls: 40 total. Next 1RM Squats: 6 @ 185. Bench: 3 @ 140. Deadlift: 3 @ 255. 5x5 that day were hard. So, increase next week gradually. OHP: 6 @ 80.

Cold brew coffee

Grind setting on Baratza Encore: 32-40. Should probably start with 35. Coffee to water ratio, in terms of grams etc.: 1:5, for a stronger brew. Mix ice, milk or just water later on as needed. 1:15 for regular black coffee. Leave for 12 hours or so. Use Chemex filter at the end. Also, make sure coffee is fully wet at the start of the brewing process.

What type of backup system should I setup?

For now: Use the RPi, both to backup Proxmox and MacOS. The only concern is Proxmox backups won’t be incremental. Try: https://github.com/ayufan/pve-backup-server-dockerfiles/blob/master/docker-compose.yml on the Pi. Earlier thoughts: I want a backup system that: Works for MacOS and my Proxmox home server. Set it and forget it. Shouldn’t be terribly hard to set it up. Can backup to Backblaze or a few other cloud services. (I don’t want something that just works with Rsync.net) Preferably, same technology on both places but that’s not a hard requirement. Auto-restic: Last time, I couldn’t setup a cron job on my Mac: the command couldn’t access the config file. Resticprofile seems like a nice alternative that generates Mac cron job as well. Kopia: Seems to be used a lot but isn’t very old. So, I worry if it is reliable. This time, I couldn’t get it to read data from the 2nd Mac account. Proxmox Backup Server is also a neat idea, if I have a separate computer, of course. Checkout Veaam. Unsolved problems on my Mac: How to get the tool to read data from the other user account on my Mac? One part of the solution is “full disk access” setting. Resources: Key generator: https://it-tools.tech/token-generator Excludes: https://raw.githubusercontent.com/rubo77/rsync-homedir-excludes/master/rsync-homedir-excludes.txt

Logical clocks

How to reconcile logical clocks with wall clocks? Two algorithms: Lamport. Total order, consistent with causality. Vector clocks. Related but not same as version vectors. Q: how to merge two event timestamps? Q: how to compare? How to find incomparable? Timestamps summarize everything that happened before. Partial vs total order: Partial == happens before: order only between causal events, none between concurrent. Basically, some events are incomparable. Total: order defined for each pair of events. Timestamps are incremented before message sent to another node and when received.

VoIP mobile apps

Good mobile apps for iPhone that support VoIP: Bria Mobile. Zoiper.

Where to get a hitch installed in car?

Michael’s Bellevue: Bickford: Airport: Good pricing. Clearview: $730 or so, July 27. Kirshner: $900 for August 2. Truck builders: Don’t do. U-haul phone number: 800-468-4285

Shelly inside wall switch

This website describes color coding of wires, why you need a neutral wire and how to find it. I’ll most likely have neutral wires in our wall switches. However, it seems neutral is NOT mandatory in the switch - if the switch doesn’t require neutral, that should be okay.

Water leak detectors

Here are some good water leak detectors I found in my research: Shelly: About $29 per device: https://www.shelly.cloud/en-us/products/shop/shelly-flood/4xflood-us Govee: One way: 3 sensors + hub is for $45: https://www.amazon.com/Detector-Wireless-Notification-Security-Basement/dp/B07J9HZ5VN 2 more sensors (if we need) is for $23 more: https://www.amazon.com/Govee-Wireless-Detector-Basement-Apartment-dp-B07JB84351/dp/B07V4R16HX So, total $68 for 5 sensors and a hub. Another: 5 sensors for $42: https://www.amazon.com/Govee-Detectors-Wireless-Detector-Sensitive/dp/B07QSFRSJX 1 sensor + hub: $13: https://www.amazon.com/Govee-Wireless-Detector-Basement-Apartment-dp-B07JB84351/dp/B07V4R16HX So, $55 for 6 sensors and a hub. Or $65 for 7 sensors and a hub. One potential problem is that the hub may not cover the entire house. Says 100m but the number would be less when there are walls and floors in between.