Bill.W 0xbillw

Recovery

TL;DR: for some weird reason zfs was not being loaded in grub, maybe related to this bug?

ATTENTION: I copy pasted some things from my memory so, some things may be mistyped or wrong, proceed with caution or leave a comment ⚠️

insmod zfs
zfs-bootfs (hd1,gpt3) # or whatever is your structure

Best practices for maintaining & running substrate-based (para)chain (wip)

Ensure all of your systems are kept up-to-date, especially with security updates.
Ensure you can fully bootstrap a new system from scratch easily if needed.
Upload archive chain backups frequently. Potentially make these available to the community down the road.
Have database recovery methods in place.
Use infrastructure as code. Never modify anything manually on your servers.
Ensure you have a monitoring stack set up WITH alerts (alertmanager/grafana alerts/bots etc).
Keep alerts actionable, otherwise they become noise.
If a service crashes, make sure it automatically restarts in some way (via systemd or kubernetes).

a simple git branching model

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

JavaScript Log Wrapping

Wrapping console.log (et al.) in your own function to modify logging behavior.

Why?

You may want a simple way to:

How Fast is Git?

The web is full of benchmarks showing the supernatural speed of Git even with very big repositories, but unfortunately they use the wrong variable. Size is not important, but the number of files in the repository really is!

Why is that? Well, that's because Git works in a very different way compared to Synergy. You don't have to checkout a file in order to edit it; Git will do that for you automatically. But at what price?

The price is that for every Git operation that requires to know which files changed (git status, git commmit, etc etc) an lstat() call will be executed for every single file

Wow! So how does that perform on a fairly large repository? Let's find out! For this example I will use an example project, which has 19384 files in 1326 folders.

	import { LiquidityPoolKeysV4, MARKET_STATE_LAYOUT_V3, Market, TOKEN_PROGRAM_ID } from "@raydium-io/raydium-sdk";
	import { Connection, Logs, ParsedInnerInstruction, ParsedInstruction, ParsedTransactionWithMeta, PartiallyDecodedInstruction, PublicKey } from "@solana/web3.js";

	const RPC_ENDPOINT = 'https://api.mainnet-beta.solana.com';
	const RAYDIUM_POOL_V4_PROGRAM_ID = '675kPX9MHTjS2zt1qfr1NYHuzeLXfQM9H24wFSUt1Mp8';
	const SERUM_OPENBOOK_PROGRAM_ID = 'srmqPvymJeFKQ4zGQed1GFppgkRHL9kaELCbyksJtPX';
	const SOL_MINT = 'So11111111111111111111111111111111111111112';
	const SOL_DECIMALS = 9;

	const connection = new Connection(RPC_ENDPOINT);

	FROM alpine:3.9

	ENV LIBRD_VER=1.3.0
	WORKDIR /tmp


	#vishnus-MacBook-Pro:librd vrao$ docker images \|grep lib
	#lib proper_cleanup 675073279e9c 4 seconds ago 53.3MB
	#lib cleanup 7456af7df73b 2 minutes ago 218MB
	#lib simple 9724aed9519c 7 minutes ago 342MB

	#!/bin/sh

	if pwd \| grep /mnt/c > /dev/null; then
	exec git.exe "$@"
	else
	exec /usr/bin/git "$@"
	fi