Reinaldo Souza juniorz

DeutschlandTicket Anomalien

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Keep-Alive

time telnet www-org.example.com 80

GET / HTTP/1.1
Host: www-org.example.com
Connection: keep-alive

(wait)

Overly aggressive CFS

We're looking at CPU bandwidth control via CFS:

https://www.kernel.org/doc/Documentation/scheduler/sched-bwc.txt

Reproduction program

Program does number of iterations, in each iteration we burn CPU in small chunks until we get 5ms of real time spent. On each iteration we also print how much

Falsehoods programmers believe about time

This is a compiled list of falsehoods programmers tend to believe about working with time.

Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.

Falsehoods

There are always 24 hours in a day.
February is always 28 days long.
Any 24-hour period will always begin and end in the same day (or week, or month).

Just documenting docs, articles, and discussion related to gRPC and load balancing.

https://github.com/grpc/grpc/blob/master/doc/load-balancing.md

Seems gRPC prefers thin client-side load balancing where a client gets a list of connected clients and a load balancing policy from a "load balancer" and then performs client-side load balancing based on the information. However, this could be useful for traditional load banaling approaches in clound deployments.

https://groups.google.com/forum/#!topic/grpc-io/8s7UHY_Q1po

gRPC "works" in AWS. That is, you can run gRPC services on EC2 nodes and have them connect to other nodes, and everything is fine. If you are using AWS for easy access to hardware then all is fine. What doesn't work is ELB (aka CLB), and ALBs. Neither of these support HTTP/2 (h2c) in a way that gRPC needs.

Setting up Pi Zero OTG - The quick way (No USB keyboard, mouse, HDMI monitor needed)

More details - http://blog.gbaman.info/?p=791

For this method, alongside your Pi Zero, MicroUSB cable and MicroSD card, only an additional computer is required, which can be running Windows (with Bonjour, iTunes or Quicktime installed), Mac OS or Linux (with Avahi Daemon installed, for example Ubuntu has it built in).
1. Flash Raspbian Jessie full or Raspbian Jessie Lite onto the SD card.
2. Once Raspbian is flashed, open up the boot partition (in Windows Explorer, Finder etc) and add to the bottom of the config.txt file dtoverlay=dwc2 on a new line, then save the file.
3. If using a recent release of Jessie (Dec 2016 onwards), then create a new file simply called ssh in the SD card as well. By default SSH i

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

	#### WAY with crictl
	#### TODO validate crictl with docker runtime !!

	# Get all pods of a specific node
	#kubectl get po --field-selector=spec.nodeName="fluffy-master" --all-namespaces
	kubectl get --all-namespaces po --field-selector=spec.nodeName=="$(hostname)" -o json \| jq -r '.items[] \| select(.status.hostIP!=.status.podIP) \| "\(.metadata.name) \(.metadata.namespace)"'

	# Get the Pod ID of the Pod with crictl
	POD_ID=$(sudo crictl pods --name=nginx-6f858d4d45-vnszm --namespace=default -q --no-trunc)

	#
	# Needless to say, I (Volkan Ozcelik) take no responsibility, whatsoever,
	# about what will happen to your NAS when you try these.
	# When did it to mine, I observed ENORMOUS performance gain and a zen-like silence.
	#
	# +----------------------------------------------------------+
	# \| WHAT YOU ARE GOING TO DO CAN LIKELY VOID YOUR WARRANTY \|
	# \| SO PROCEED WITH CAUTION \|
	# +----------------------------------------------------------+
	#

	File: pinentry.info, Node: Top, Next: Using pinentry, Up: (dir)

	Introduction
	************

	This manual documents how to use the PINENTRY and its protocol.

	The PINENTRY is a small GUI application used to enter PINs or
	passphrases. It is usually invoked by GPG-AGENT (*note Invoking the
	gpg-agent: (gnupg)Invoking GPG-AGENT, for details).