Raunak Ramakrishnan rrampage

Tech Links

Compilers, Interpreters, Language Design, etc.

Various search databases and backends as alternatives to Elasticsearch.

Rust

Sonic - github.com/valeriansaliou/sonic - lightweight & schema-less search backend
Tantivy - github.com/quickwit-oss/tantivy - full-text search engine library inspired by Apache Lucene
Toshi - github.com/toshi-search/Toshi - search engine built on top of Tantivy
Bayard - github.com/mosuka/bayard - search engine built on top of Tantivy
Meilisearch - github.com/meilisearch/meilisearch - fast and full-featured search engine

Program Analysis Resources

(draft; work in progress)

Lenovo ideapad 330 (15ARR) ubuntu issues and their solutions

Issue-1: None of the ubuntu distros are getting installed

Solution: Ubuntu distros lower than 18.10 will not work in this laptop, as minimum kernal version required is 4.18.

So install ubuntu 18.10 / xubuntu 18.10 / lubuntu 18.10 / kubuntu 18.10 in UEFI mode

Issue-2: Wifi is not working

FFmpeg cheat sheet

A list of useful commands for the FFmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

Setup interface eth1 and configure the DHCP/DNS server

configure
 
set interfaces ethernet eth1 address 192.168.2.254/24
set interfaces ethernet eth1 description "eth1 - LAN"
set interfaces ethernet eth1 duplex auto
set interfaces ethernet eth1 speed auto

Prologue

I wrote this answer on stackexchange, here: https://stackoverflow.com/posts/12597919/

It was wrongly deleted for containing "proprietary information" years later. I think that's bullshit so I am posting it here. Come at me.

The Question

Amazon is a SOA system with 100s of services (or so says Amazon Chief Technology Officer Werner Vogels). How do they handle build and release?

Thread Pools

Thread pools on the JVM should usually be divided into the following three categories:

CPU-bound
Blocking IO
Non-blocking IO polling

Each of these categories has a different optimal configuration and usage pattern.

	#!/usr/bin/env python3

	import subprocess
	import json
	import os
	from pathlib import Path

	import requests
	from requests.compat import urljoin

	# LVDB - LLOOGG Memory DB
	# Copyriht (C) 2009 Salvatore Sanfilippo <[email protected]>
	# All Rights Reserved

	# TODO
	# - cron with cleanup of timedout clients, automatic dump
	# - the dump should use array startsearch to write it line by line
	# and may just use gets to read element by element and load the whole state.
	# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
	# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!