Vanmanh Dao manhdaovan

Rails v1.0 読書会

ORMまわりを中心に読む

findしたものをARにどうやって詰めるのか

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優秀なプログラマーになるためのコツ

重要な順で

優秀なプログラマーになるには非常に長い時間がかかるという現実を直視すべし

優秀なプログラマーというのは寝ている間に異世界に召喚されて無双するのとはわけが違うんですよ。

自分の例で言うとプログラミングを始めた中学生の時から優秀なプログラマだったかって、そんなわけない。みんなヘッポコからスタートしているに決まってるわけです。以来二十余年、地道に生き恥を晒し続けてきた結果として、現在いちおう業界の末席を汚すところまで来ている。このプロセスから目を背けるべきではないです。優秀なプログラマーに生まれる人間なんかいない。優秀なプログラマーに「育つ」んだし、それには時間が必要。今日から無双したいと思うな。

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Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

2021 Update: Easiest option is Justin's repo and image

Just run this from your Mac terminal and it'll drop you in a container with full permissions on the Docker VM. This also works for Docker for Windows for getting in Moby Linux VM (doesn't work for Windows Containers).

docker run -it --rm --privileged --pid=host justincormack/nsenter1

more info: https://github.com/justincormack/nsenter1

##Working configuration to accomplish 0-downtime deploy with unicorn 5.x and systemd on centos 7

The scope is to accomplish a 0-downtime reload of a unicorn service managed by Systemd on a Centos 7 distro.

The examples and assumptions that i found on the bogomips's unicorn repo seems not working for centos 7.

Below a working configuration tested on Centos 7 and unicorn 5.1

Any advice/remark will be appreciated

OpenID Connect federation model

All JWS's passed between entities MUST contain the "kid" header parameter to allow explicitly signaling a key change to the recipient. Furthermore, all key id's used by an entity MUST be scoped (to avoid name conflicts) by a unique URI managed by the organization owning the entity. In the same way, all JWK's passed between entities must have a scoped key id.

JWS's in the model:

Software statements issued by a federation.

	# This server demo does a socket hijack in Rack and then saves the socket to a global variable
	# to prevent it from being GCed when the Puma thread ends. It will then write "BEEP" to each
	# socket every ten seconds to prevent the connection timing out. During testing, it easily
	# handled up to 65523 connections, after which it ran into the `ulimit` for open file descriptors.
	# The bit with the waiting area is there because a normal `Set` is not thread safe and it would
	# drop socket due to race conditions. The `Queue` is thread safe and will make sure all sockets
	# are preserved.

	# run with `rackup -q -p 8000 -o 0.0.0.0 c10k.ru`
	# testing: install `ab` and then run `ab -c 20000 -n 20000 <ip adress of server>:8000/

	{
	"0162": "032",
	"0163": "033",
	"0164": "034",
	"0165": "035",
	"0166": "036",
	"0167": "037",
	"0168": "038",
	"0169": "039",
	"0120": "070",

	# after appcleaner does his magic, do this

	sudo rm -rf "/Library/Application Support/Paragon Software/"
	sudo rm /Library/LaunchDaemons/com.paragon-software.installer.plist
	sudo rm /Library/LaunchDaemons/com.paragon-software.ntfs.loader.plist
	sudo rm /Library/LaunchDaemons/com.paragon-software.ntfsd.plist
	sudo rm /Library/LaunchAgents/com.paragon-software.ntfs.notification-agent.plist
	sudo rm -rf /Library/Filesystems/ufsd_NTFS.fs/
	sudo rm -rf /Library/PrivilegedHelperTools/com.paragon-software.installer
	sudo rm -rf /Library/Extensions/ufsd_NTFS.kext/