Wey Gu wey-gu

vim

c i w
c i [
c i <

tmux

apk add tzdata

cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

echo "Asia/Shanghai" > /etc/timezone

date -R # Verify that it's working properly

2050 website design, graph part

By 古思为

设计需求 via 庄表伟

简单介绍一下我的思路。在2050，最重要的就是人与人之间产生的各种关系，我是被谁“interface”来的，我又“interface”了哪些人。我发起了一个，有哪些因此被吸引而来（有些人是来帮忙，有些人只是来参加活动），我在2050的聚会中，与谁聊得特别开心，后来就follow了TA，进一步关注TA的一举一动，等等。

在一个人的个人页面上，我们会在右侧，先简单展示他的“上下游”关系，点击更多，可以把各种关系都展示出来，越是与他有N种关系的人，就会离他越近

Get the nebula cluster's metaD ports

$ docker port nebula-docker-compose_metad0_1 | grep ^9559
9559/tcp -> 0.0.0.0:49189
$ docker port nebula-docker-compose_metad1_1 | grep ^9559
9559/tcp -> 0.0.0.0:49190
$ docker port nebula-docker-compose_metad2_1 | grep ^9559
9559/tcp -> 0.0.0.0:49188

TOC

Condition expressions on multiple hops in MATCH
FIND PATH
Use MATCH to get STATS
Important reference variable and functions you could miss!
nGQL MATCH v.s. OpenCypher MATCH
Escaping key words
RETURN values should be explicitly specified in latest WITH Clause

tck tips

use -k tear down in each testsuite

https://discuss.nebula-graph.com.cn/t/topic/6707

# install dependencies like gflag,lz4, etc... referring to ref:2.
# e.g. ubuntu
sudo apt-get install libgflags-dev libsnappy-dev zlib1g-dev libbz2-dev liblz4-dev libzstd-dev

git clone [email protected]:facebook/rocksdb.git
git checkout 6.15.fb # as in nebula 2.6.0 , check on /opt/vesoft/third-party/3.0/include/rocksdb/version.h
cd rocksdb
cmake -DWITH_LZ4=ON -DWITH_ZLIB=ON -DWITH_SNAPPY=ON
make ldb -j 64 # specify your thread number here

How I built this nebula-algorithm-2.6.1-patched-domain-name.jar ./*:

Checkout vesoft-inc/nebula-java#437 and build nebula-java client: mvn -B package -Dmaven.test.skip
Download nebula-algo 2.6.1 jar package
cd temp_algo;jar -xvf nebula-algorithm-2.6.1.jar
cd ../temp_client;jar -xvf client-2.6.1.jar
cd ../temp_algo;cp -r ../temp_client/com/vesoft/nebula/* com/vesoft/nebula;rm nebula-algorithm-2.6.1.jar
jar -cfM0 nebula-algorithm-2.6.1-patched-domain-name.jar ./*

Here is an example that I performed a Louvain algorithm, it's basically what I had done in this post: https://siwei.io/nebula-livejournal/

Nebula Console:

CREATE SPACE louvain (partition_num=15, replica_factor=1, vid_type=FIXED_STRING(256)) comment="louvain test";

create tag user() comment = 'user';

create edge relation(weight int)  COMMENT = 'user relation';

	#!/usr/bin/env bash

	# http://papers.ch/speeding-up-your-mac-osx-terminal-input/

	#echo "Disable press-and-hold for keys in favor of key repeat"
	#defaults write NSGlobalDomain ApplePressAndHoldEnabled -bool false

	echo "Set a blazingly fast keyboard repeat rate"

	defaults write NSGlobalDomain KeyRepeat -int 2