benbalter

# Bulk convert shapefiles to geojson using ogr2ogr
# For more information, see http://ben.balter.com/2013/06/26/how-to-convert-shapefiles-to-geojson-for-use-on-github/

# Note: Assumes you're in a folder with one or more zip files containing shape files
# and Outputs as geojson with the crs:84 SRS (for use on GitHub or elsewhere)

#geojson conversion
function shp2geojson() {
  ogr2ogr -f GeoJSON -t_srs crs:84 "$1.geojson" "$1.shp"
}

juanignaciosl

Spark notes

Pieces

Mostly taken from [3]

The RDD is how Spark simplifies complex operations like join or groupBy and hides the fact that under the hood, you’re dealing with fragmented data.

The number of partitions is important because a stage in Spark will operate on one partition at a time (and load the data in that partition into memory). Consequently, if you have fewer partitions than active stages, you will wind up under-utilizing your cluster. Furthermore, since with fewer partitions there’s more data in each partition, you increase the memory pressure on your program. On the flip side, with too many partitions, your performance may degrade as you take a greater hit from network and disk I/O.

arturmkrtchyan

curl http://spark-cluster-ip:6066/v1/submissions/status/driver-20151008145126-0000

pppsunil

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.spnotes.spark</groupId>
    <artifactId>HelloSparkStreaming</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>

fopina

#!/usr/bin/env python

import pyaudio
import socket
import sys

FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
CHUNK = 4096

fntlnz

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

Zsailer

from IPython.display import HTML
from IPython.display import display

# Taken from https://stackoverflow.com/questions/31517194/how-to-hide-one-specific-cell-input-or-output-in-ipython-notebook
tag = HTML('''<script>
code_show=true; 
function code_toggle() {
    if (code_show){
        $('div.cell.code_cell.rendered.selected div.input').hide();
    } else {

idoshamun

FROM openjdk:8-jre-alpine

RUN mkdir -p /opt/app
WORKDIR /opt/app

COPY ./run_jar.sh ./app-assembly.jar ./

ENTRYPOINT ["./run_jar.sh"]

Arnold1

// reference: https://stackoverflow.com/questions/36795680/copy-schema-from-one-dataframe-to-another-dataframe?rq=1

case class Person(Dummy: String, Name: String, Timestamp: String, Age: Int)
 
val personDF = spark.sparkContext.parallelize(Seq(Person("dummy", "Ray", "12345", 23), Person("dummy", "John", "12345", 44))).toDF()
 
val personSchema = StructType(
    Seq(StructField("Name", StringType, true),
        StructField("Age", IntegerType, true)))
var dataRDD = spark.sparkContext.emptyRDD[Row]

conker84

FROM apache/zeppelin:0.8.0

# Workaround to "fix" https://issues.apache.org/jira/browse/ZEPPELIN-3586

RUN echo "$LOG_TAG Download Spark binary" && \
    wget -O /tmp/spark-2.3.1-bin-hadoop2.7.tgz http://apache.panu.it/spark/spark-2.3.1/spark-2.3.1-bin-hadoop2.7.tgz && \
    tar -zxvf /tmp/spark-2.3.1-bin-hadoop2.7.tgz && \
    rm -rf /tmp/spark-2.3.1-bin-hadoop2.7.tgz && \
    mv spark-2.3.1-bin-hadoop2.7 /spark-2.3.1-bin-hadoop2.7