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<!DOCTYPE html>
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<meta content="Byron ZHU" name="author">
<meta property="og:title" content="雜">
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<a class="nav-item" href="https://byronz.github.io"><h1 class="title is-4">雜</h1></a>
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<article>
<h1 class="title"><a href="https://byronz.github.io/posts/docker_dev/">Docker Dev</a></h1>
<h2 class="subtitle is-5">December 2, 2019</h2>
<div class="content">
commons installs RUN export DEBIAN_FRONTEND=noninteractive && \ apt update && apt install -y --no-install-recommends \ sudo curl iputils-ping gcc make build-essential git vim openssh-client ca-certificates wget curl sudo gnupg vim iputils-ping && \ apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false RUN mkdir -p /root/.ssh && \ ssh-keygen -A && \ chmod 0700 /root/.ssh && \ ssh-keyscan github.com > /root/.ssh/known_hosts chmod 600 /root/.ssh/id_rsa RUN echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers RUN groupadd --gid 999 docker && \ useradd -u 1000 -g users -G sudo,docker dev
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<article>
<h1 class="title"><a href="https://byronz.github.io/posts/pycon_quality/">PYCON 2018 Code Quality</a></h1>
<h2 class="subtitle is-5">June 4, 2018</h2>
<div class="tags">
<a class="button is-link" href="/tags/cleveland">Cleveland</a>
<a class="button is-link" href="/tags/pycon">PYCON</a>
<a class="button is-link" href="/tags/2018">2018</a>
<a class="button is-link" href="/tags/quality">Quality</a>
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<div class="content">
PYCQA pylint vs flake8 https://code.visualstudio.com/docs/python/linting
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</article>
<article>
<h1 class="title"><a href="https://byronz.github.io/posts/init_mac/">Init_mac</a></h1>
<h2 class="subtitle is-5">May 26, 2018</h2>
<div class="tags">
<a class="button is-link" href="/tags/mac">mac</a>
<a class="button is-link" href="/tags/install">install</a>
</div>
<div class="content">
REMIDNER copy your previous terminal history
Set up byronz.github.com ssh-keygen -t rsa -b 4096 -C "byron.zhu.xq@gmail.com" cat ~/.ssh/id_rsa.pub | pbcopy add ssh key in github git clone git@github.com:byronz/blog.git if you have public, need to readd as submodule git rm -f public git submodule add -b master git@github.com:byronz/byronz.github.io.git public cd themes git submodule add -b master git@github.com:mgjohansen/hucore.git hucore install hugo brew install hugo https://gohugo.io/hosting-and-deployment/hosting-on-github/
Python brew install python3 cd /tmp && curl https://bootstrap.
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<article>
<h1 class="title"><a href="https://byronz.github.io/posts/tech_tips/">Tech Tips</a></h1>
<h2 class="subtitle is-5">April 20, 2018</h2>
<div class="content">
Mongo console pretty echo DBQuery.prototype._prettyShell = true >> ~/.mongorc.js
</div>
</article>
<article>
<h1 class="title"><a href="https://byronz.github.io/posts/nosql_riak/">Riak</a></h1>
<h2 class="subtitle is-5">February 22, 2018</h2>
<div class="content">
Riak KV Note: I think the official documentation quality is very poor, a lot of links are 404 and not updated
Query option Riak search via Apache Solr Secondary Index Map Reduce Riak TS CREATE TABLE GeoCheckin ( region VARCHAR NOT NULL, - state VARCHAR NOT NULL, | time TIMESTAMP NOT NULL, | --> Column Definitions weather VARCHAR NOT NULL, | temperature DOUBLE, _ PRIMARY KEY ( (region, state, QUANTUM(time, 15, 'm')), <-- Partition Key => group data that will be queried together in the same physical part of the cluster region, state, time <-- Local Key => ) ) Note: Only one quantum function may be specified and it must be the last element of the partition key.
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<article>
<h1 class="title"><a href="https://byronz.github.io/posts/nosql_mongo/">Mongo</a></h1>
<h2 class="subtitle is-5">February 22, 2018</h2>
<div class="tags">
<a class="button is-link" href="/tags/nosql">nosql</a>
<a class="button is-link" href="/tags/document">document</a>
<a class="button is-link" href="/tags/mongo">mongo</a>
<a class="button is-link" href="/tags/db">db</a>
<a class="button is-link" href="/tags/cluster">cluster</a>
<a class="button is-link" href="/tags/shard">shard</a>
</div>
<div class="content">
Replication Set A replica set in MongoDB is a group of mongod processes that maintain the same data set
A replica set can have only one primary capable of confirming writes with { w: “majority” } write concern
election new leader takes about 10-30s before, after v3.2 ~2s
Shared Cluster https://docs.mongodb.com/manual/tutorial/deploy-shard-cluster/
shard: Each shard contains a subset of the sharded data. Each shard can be deployed as a replica set.
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<article>
<h1 class="title"><a href="https://byronz.github.io/posts/nosql_cassandra/">Cassandra</a></h1>
<h2 class="subtitle is-5">February 21, 2018</h2>
<div class="tags">
<a class="button is-link" href="/tags/nosql">nosql</a>
<a class="button is-link" href="/tags/cassandra">cassandra</a>
<a class="button is-link" href="/tags/column">column</a>
<a class="button is-link" href="/tags/db">db</a>
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<div class="content">
Data Model Map<RowKey, SortedMap<ColumnKey, ColumnValue>>
CREATE KEYSPACE sports WITH REPLICATION = {'class' : 'NetworkTopologyStrategy', 'datacenter1' : 2}; # you can tune the r/w consistency level with keyspace Availability versus Consistency CREATE TABLE crossfit_gyms_by_city ( country_code text, state_province text, city text, gym_name text, opening_date timestamp, PRIMARY KEY ((country_code, state_province, city), opening_date, gym_name) ) WITH CLUSTERING ORDER BY ( opening_data ASC, gym_name ASC ); Cassandra RDBMS Keyspace Database Column Family Table Partition Key Primary Key Partitioner A partitioner determines how data is distributed across the nodes in the cluster (including replicas).
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<article>
<h1 class="title"><a href="https://byronz.github.io/posts/bai/">Bai XianYong</a></h1>
<h2 class="subtitle is-5">February 19, 2018</h2>
<div class="content">
遊園驚夢 白先勇 錢夫人到達臺北近郊天母竇公館的時候，竇公館門前兩旁的汽車已經排滿了，大多是官家的黑色小轎車，錢夫人坐的計程車開到門口她便命令司
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<article>
<h1 class="title"><a href="https://byronz.github.io/posts/mac/">Mac Unicode</a></h1>
<h2 class="subtitle is-5">February 15, 2018</h2>
<div class="content">
Switch to Unicode Hex Input and Type ⌥ +{unicode val}
Tab U+21E5 ⇥ Option U+2325 ⌥ Command U+2318 ⌘ Control U+2303 ⌃ Shift U+21E7 ⇧ Clear U+2327 ⌧ Escape U+238B ⎋
</div>
</article>
<article>
<h1 class="title"><a href="https://byronz.github.io/posts/tsdb/">NOSQL DB</a></h1>
<h2 class="subtitle is-5">February 9, 2018</h2>
<div class="content">
Cassandra Cassandra’s data model consists of keyspaces, column families, keys, and columns.
Data Model Map<RowKey, SortedMap<ColumnKey, ColumnValue>>
CREATE TABLE crossfit_gyms_by_city ( country_code text, state_province text, city text, gym_name text, opening_date timestamp, PRIMARY KEY ((country_code, state_province, city), opening_date, gym_name) ) WITH CLUSTERING ORDER BY ( opening_data ASC, gym_name ASC ); Partitioner A partitioner determines how data is distributed across the nodes in the cluster (including replicas).
Murmur3Partitioner (default): uniformly distributes data across the cluster based on MurmurHash hash values.
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<p>© 2018 | 朱曉清 | <small>powered by</small> <a href="gohugo.io" target="_blank">Hugo</a></p>
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