| 1 |
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| 2 | ----
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| 3 | Introduction
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| 4 | ----
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| 5 |
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| 6 | Java code for processing HTRC Extracted Feature JSON files, suitable for
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| 7 | ingesting into Solr. Designed to be used on a Spark cluster with HDFS.
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| 8 |
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| 9 | ----
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| 10 | Setup Proceddure
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| 11 | ----
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| 12 |
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| 13 | This is Step 2, of a two step setup procedure.
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| 14 |
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| 15 | For Step 1, see:
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| 16 |
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| 17 | http://svn.greenstone.org/other-projects/hathitrust/vagrant-spark-hdfs-cluster/trunk/README.txt
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| 18 |
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| 19 | *Assumptions*
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| 20 |
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| 21 | * You have 'svn' and 'mvn' on your PATH
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| 22 |
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| 23 | ----
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| 24 | Step 2
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| 25 | ----
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| 26 |
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| 27 | 1. Check HDFS and Spark Java daemon processes are running:
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| 28 |
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| 29 | jps
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| 30 |
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| 31 | Example output:
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| 32 |
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| 33 | 19212 NameNode
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| 34 | 19468 SecondaryNameNode
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| 35 | 19604 Master
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| 36 | 19676 Jps
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| 37 |
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| 38 | [[
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| 39 | Starting these processes was previously covered in Step 1, but in brief,
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| 40 | after formatting the disk with:
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| 41 |
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| 42 | hdfs namenode -format
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| 43 |
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| 44 | The daemons are started with:
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| 45 |
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| 46 | start-dfs.sh
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| 47 | spark-start-all.sh
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| 48 |
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| 49 | The latter is an alias defined by Step 1 provisioning (created to
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| 50 | avoid the conflict over 'start-all.sh', which both Hadoop and
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| 51 | Spark define)
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| 52 | ]]
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| 53 |
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| 54 | 2. Acquire some JSON files to process, if not already done so.
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| 55 | For example:
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| 56 |
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| 57 | ./scripts/PD-GET-FULL-FILE-LIST.sh
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| 58 | ./scripts/PD-SELECT-EVERY-10000.sh
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| 59 | ./scripts/PD-DOWNLOAD-EVERY-10000.sh
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| 60 |
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| 61 | 3. Push these files over to HDFS
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| 62 |
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| 63 | hdfs dfs -mkdir /user
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| 64 | hdfs dfs -mkdir /user/htrc
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| 65 |
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| 66 | hdfs dfs -put pd-file-listing-step10000.txt /user/htrc/.
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| 67 | hdfs dfs -put pd-ef-json-files /user/htrc/.
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| 68 |
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| 69 | 4. Compile the code:
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| 70 |
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| 71 | ./COMPILE.bash
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| 72 |
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| 73 | The first time this is run, a variety of Maven/Java dependencies will be
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| 74 | downloaded.
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| 75 |
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| 76 | 5. Run the code on the cluster:
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| 77 |
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| 78 | ./RUN.bash pd-ef-json-filelist-10000.txt
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| 79 |
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| 80 |
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| 81 | If running subsequently, remove the saved RDD on HDFS first:
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| 82 |
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| 83 | hdfs dfs -rm -r rdd-solr-json-page-files
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| 84 |
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