Jingyu Zhou jzhou77

FDB Tips

OOM debugging

TraceEvent can cause OOMs in simulation #2218

moveKeysLockOwnerKey

Net2::run loop

C API to N2::Net2::run() Stack Trace

Brew Bundle Brewfile Tips

Copyright & License

Unless otherwise noted (either in this file or in a file's copyright section) the contents of this gist are Copyright ©️2020 by Christopher Allen, and are shared under spdx:Creative Commons Attribution Share Alike 4.0 International (CC-BY-SA-4.) open-source license.

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	这两天儿子要听舒克和贝塔，恰好只有百度盘上面有。Mac版的百度盘客户端做的很差，好像只能支持全部文件同步，所以早就删掉了。怎么办？

	研究了一下，从http://codespaper.com/2015/07/19/baiduyun-fastdown/看到一个方法，只要装一个Chrome的插件和另外一个命令行的工具。这太适合我了——最喜欢用命令行搞定东西了。

	＃＃软件安装
	Chrome插件在这里：https://github.com/acgotaku/BaiduExporter

	另外一个软件叫Aria2（https://sourceforge.net/projects/aria2/），MacPort上直接有，一个命令搞定：
	port install aria2

	https://www.interviewbit.com 这里有design题目和一些解答，有公司tag看一个公司问的题目，烙印网站
	https://leetcode.com/ 题目很多，国人网站

	System Design Interview
	- https://github.com/checkcheckzz/system-design-interview
	- https://www.careercup.com/page?pid=system-design-interview-questions
	- http://www.hiredintech.com/system-design
	- https://www.quora.com/How-do-I-prepare-to-answer-design-questions-in-a-technical-interview
	- https://www.palantir.com/2011/10/how-to-ace-a-systems-design-interview/

-Use open source QPDF:
-$ qpdf --decrypt input.pdf output.pdf
-And the restrictions were removed. Note that the original PDF was not password protected.
-Another way of using ghostscript:
-$ gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=OUTPUT.pdf -f INPUT.pdf

	# compile bindings
	m bindings\|fdb_c\|fdb_python\|fdb_flow\|fdb_flow_tester


	fdbserver -p 127.0.0.1:4504 -C fdb/test.cluster

	# install new C binding library, or use packages
	sudo cp /media/psf/Home/fdb/foundationdb/lib/libfdb_c.so /usr/lib/libfdb_c.so
	sudo dpkg -i /media/psf/Home/fdb/foundationdb/packages/foundationdb-clients_6.2.0-0INTERNAL_amd64.deb
	sudo dpkg -i /media/psf/Home/fdb/foundationdb/packages/foundationdb-server_6.2.0-0INTERNAL_amd64.deb

	You cannot resize a mounted disk in Linux. Probably the easiest way to do this is to download the gparted live CD .iso file and tell your Ubuntu VM to boot from that image as the CD Drive. Then you should be able to resize your existing hard drive partition. When gparted is finished shut down your VM and reset your VM boot order to boot from the Hard Drive again.

	Here is an article that explains the process for VMWare:

	http://data.agaric.com/increase-main-partition-size-ubuntu-within-vmware-fusion

	Steps 1,3 and 6 are only things that should be different.

	Step 1 - you have already done.
	Step 3 - Use Configure... \| Hardware \| Boot Order to change the Boot Order and Hardware \| CD/DVD 1 to point your CD to the downloaded .iso (also ensure that the Connected checkbox is checked, otherwise Parallels will ignore the CD drive during boot)

	# From http://garmoncheg.blogspot.com/2012/06/pretty-git-log.html
	git config --global alias.lg "log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --"

	'recovery-duration.txt' file content:

	Duration
	0.127489
	0.134138
	0.151415
	0.180696
	0.196397
	0.212269
	0.243426

	Issuing configuration change: memory-radixtree-beta
	Issuing configuration change: memory-1
	Issuing configuration change: backup_worker_enabled:=1
	Issuing configuration change: log_version:=4
	Issuing configuration change: double usable_regions=1 regions=[{"datacenters":[{"id":"0","priority":1}]},{"datacenters":[{"id":"1","priority":-1}]}] logs=-1

	(gdb) p *(newState.tLogs._M_impl._M_start)
	$5 = {tLogs = {<std::_Vector_base<UID, std::allocator<UID> >> = {
	_M_impl = {<std::allocator<UID>> = {<__gnu_cxx::new_allocator<UID>> = {<No data fields>}, <No data fields>}, _M_start = 0x7ffff67ffa00,
	_M_finish = 0x7ffff67ffa30, _M_end_of_storage = 0x7ffff67ffa40}}, <No data fields>}, tLogWriteAntiQuorum = 0,