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pyspark output to hbase

  • Streaming to HBase with pysparkJanuary 29

    There is a fair amount of info online about bulk loading to HBase with Spark streaming using Scala (these two were particularly useful) and some info for Java, but there seems to be a lack of info for doing it with PySpark. So my questions are: How c

  • hbase client running output "Usage: mapfile infile outfile"September 18

    I have made a simple client application in java for Hbase to connect with it and show results for some queries e.g list, scan etc. But When i run my application in eclispe, there are no errors but output is only USAGE: MapFile inFile OutFile. Why thi

  • spark python script not writing to hbaseJanuary 30

    I am trying to run the script from this blog import sys import json from pyspark import SparkContext from pyspark.streaming import StreamingContext def SaveRecord(rdd): host = 'sparkmaster.example.com' table = 'cats' keyConv = "org.apache.spark.examp

  • When to use Hadoop, HBase, Hive and Pig?December 17

    What are the benefits of using either Hadoop or HBase or Hive ? From my understanding, HBase avoids using map-reduce and has a column oriented storage on top of HDFS. Hive is a sql-like interface for Hadoop and HBase. I would also like to know how Hi

  • A transistor AND gate outputs a small current when one of the inputs is HIGH. Why does this happen?

    A transistor AND gate outputs a small current when one of the inputs is HIGH. Why does this happen?October 6

    I built a simple transistor AND gate as specified by the following schematic: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/trangate.html#c1 It works very well, however it outputs a small amount of current when input B is HIGH, enough to illu

  • How do I increase the output voltage of a simple electro magnet generator

    How do I increase the output voltage of a simple electro magnet generatorJanuary 8

    I think I know the answer to this already but I can't seem to find this on Google. The keywords are all far too ambiguous apparently. I want to create a electrical flow with a magnet passing through a cylinder wrapped with copper wire. Pretty basic.

  • Getting the desired output voltage swing from the op amp output

    Getting the desired output voltage swing from the op amp outputApril 17

    I am designing a microphone preamplifier circuit. I have used op amp OPA 37 which amplifies the signal coming from the microphone to be used by the ADC. The usable voltage range of ADC is 0-2.5V. I am using a 9V power supply and two biasing resistors

  • How can I build a 2 input AND gate 24VDC PNP inputs and 24VDC output?

    How can I build a 2 input AND gate 24VDC PNP inputs and 24VDC output?June 29

    I'm trying to build an AND gate that takes two inputs from standard 3 wire 24VDC PNP sensors and provides a 24VDC output. I was thinking using some sort of diode resistor logic (link to circuit: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/d

  • pyspark: Use a breakpoint in a udf or mapped function

    pyspark: Use a breakpoint in a udf or mapped function July 6

    I have IntelliJ IDEA set up with Apache Spark 1.4. I want to be able to add debug points to my Spark Python scripts so that I can debug them easily. I am currently running this bit of Python to initialise the spark process proc = subprocess.Popen([SP

  • How to use unbase64 function in pyspark SQL query?January 18

    I cannot seem to figure out why unbase64 function won't work in my Spark SQL query. Here is an example. I'm trying to decode "VGhpcyBpcyBhIHRlc3Qh" by calling the unbase64 function within the spark SQL. Any thoughts on why the output doesn't get

  • How to write data in Elasticsearch from Pyspark?January 19

    I have integrated ELK with Pyspark. saved RDD as ELK data on local file system rdd.saveAsTextFile("/tmp/ELKdata") logData = sc.textFile('/tmp/ELKdata/*') errors = logData.filter(lambda line: "raw1-VirtualBox" in line) errors.count() va

  • Importing .csv to hbaseJanuary 19

    i tried to import my .csv file into hbase. i got this command from a book. hbase(main):048:0* hbase org.apache.hadoop.hbase.mapreduce.ImportTsv -Dimporttsv.columns=HBASE_ROW_KEY,id:name,property:job -Dimporttsv.separator=, -Dimporttsv.bulk.output=/im

  • issue in encoding categorical data in PySpark MLlibJanuary 22

    I am working on the Random Forest algorithm in PySpark MLlib. My dataset have many categorical features which I first encode. The output or the label column is numerical (in unicode string format) and so I do not encode it and exclude it while I am e

  • pyspark print one item in each lineJanuary 24

    In Pyspark, when I try to print a list, I get all the elements printed in the same line : >>> wordslist = words.collect(); >>> wordslist [(u'crazy', 1), (u'fox', 1), (u'jumped', 1)] Is there any way I could get the output printed one ite

  • java.lang.StringIndexOutOfBoundsException: String index out of range: -1 error in pyspark elasticsearchJanuary 25

    I have been following this link : http://ianozsvald.com/2015/02/19/spark-1-2-pyspark-elasticsearch-pypy/ to integrate Pyspark with ElasticSearch-hadoop connector JAR. Everything is going fine until the step : res2.saveAsNewAPIHadoopFile(path='-', out

  • Remove additional brackets from an RDD using PySparkJanuary 28

    I am doing aggregation on a set of fields using Spark in Python. I am taking few values as input & creating an array out of it. Suppose i have 10 fields & i am creating an array with 2 elements like first 9 fields as Key & the 10 field as valu

  • Hive-Hbase integration union query getting failed with can not recognize input errorFebruary 1

    I am new to hive and trying to create a hive-Hbase interactive table with the function usage str_to_map. Please help me in finding the issue with the below query : Create Table Final_Hive as select map_test["param1"], map_test["param2"

  • Filters in HBase: Designed to filter data row-wise, or column-wise, or both?February 2

    I've been confounded by how filters work in HBase (or, largely equivalently, in HappyBase--which I use to interact with HBase). The source of my confusion is that I can't seem to get a handle on what filters do. Some filters, like SingleColumnValueFi

  • HBase Shell behaviour on giving semicolonFebruary 13

    I am new to HBase. I was trying basic queries. And like usual SQL way; I was giving semicolon after every query. And query was not running. It just showed next prompt as if it is expecting next part of command. hbase(main):016:0> create 'kau_emp', 'p

  • Compress Web Output Using mod_gzip and ApacheFebruary 18

    Web page compression is not a new technology, but it has recently gained higher recognition in the minds of IT administrators and managers because of the rapid ROI it generates. Compression extensions exist for most of the major Web server platforms,

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