[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
GitHub user jatin9896 opened a pull request:

    https://github.com/apache/carbondata/pull/1805

    [CARBONDATA-1827] S3 Carbon Implementation

    1) Provide support for s3 in carbondata.
    2) Added S3Example to create store on s3.
    3) Added S3CSVExample to load csv from s3.
     
   
    Be sure to do all of the following checklist to help us incorporate
    your contribution quickly and easily:
   
     - [ ] Any interfaces changed? NO
     
     - [ ] Any backward compatibility impacted? NO
     
     - [ ] Document update required? NO
   
     - [ ] Testing done
            Please provide details on
            - Whether new unit test cases have been added or why no new tests are required?
            - How it is tested? Please attach test report.
            - Is it a performance related change? Please attach the performance test report.
            - Any additional information to help reviewers in testing this change.
           Added Examples to test the functionality
     - [ ] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.
   


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/jatin9896/incubator-carbondata s3-carbon

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/carbondata/pull/1805.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1805
   
----
commit bd5b90cfefcfa25c941c104630dbc9e9ed2b150b
Author: SangeetaGulia <sangeeta.gulia@...>
Date:   2017-09-21T09:26:26Z

    Added S3 implementation and TestCases

commit d3d374ce7a82662e1fbb6b1d0b81bfaaa3a22cc1
Author: Jatin <jatin.demla@...>
Date:   2017-11-29T07:24:48Z

    Removed S3CarbonFile and added append functionality

commit a79245a73103b58c997e20b47b7c51d91dd2e8ad
Author: Jatin <jatin.demla@...>
Date:   2018-01-15T07:43:29Z

    refactored examples

----


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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Success with Spark 2.2.1, Please check CI http://88.99.58.216:8080/job/ApacheCarbonPRBuilder/1566/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Failed  with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder1/2801/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user anubhav100 commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    retest this please


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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user ravipesala commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    SDV Build Success , Please check CI http://144.76.159.231:8080/job/ApacheSDVTests/2896/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Failed with Spark 2.2.1, Please check CI http://88.99.58.216:8080/job/ApacheCarbonPRBuilder/1571/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Failed  with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder1/2807/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user anubhav100 commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    retest this please


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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user ravipesala commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    SDV Build Success , Please check CI http://144.76.159.231:8080/job/ApacheSDVTests/2899/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Success with Spark 2.2.1, Please check CI http://88.99.58.216:8080/job/ApacheCarbonPRBuilder/1572/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Failed  with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder1/2808/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Failed  with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder1/2810/



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[GitHub] carbondata issue #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user CarbonDataQA commented on the issue:

    https://github.com/apache/carbondata/pull/1805
 
    Build Success with Spark 2.2.1, Please check CI http://88.99.58.216:8080/job/ApacheCarbonPRBuilder/1574/



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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1805#discussion_r161667809
 
    --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/S3Example.scala ---
    @@ -0,0 +1,151 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.carbondata.examples
    +
    +import java.io.File
    +
    +import org.apache.hadoop.fs.s3a.Constants.{ACCESS_KEY, SECRET_KEY}
    +import org.apache.spark.sql.SparkSession
    +import org.slf4j.{Logger, LoggerFactory}
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants
    +import org.apache.carbondata.core.util.CarbonProperties
    +
    +object S3Example {
    +
    +  /**
    +   * This example demonstrate usage of s3 as a store.
    +   *
    +   * @param args require three parameters "Access-key" "Secret-key"
    +   *             "s3 bucket path" "spark-master"
    +   */
    +
    +  def main(args: Array[String]) {
    +    val rootPath = new File(this.getClass.getResource("/").getPath
    +                            + "../../../..").getCanonicalPath
    +    val path = s"$rootPath/examples/spark2/src/main/resources/data1.csv"
    +    val logger: Logger = LoggerFactory.getLogger(this.getClass)
    +    CarbonProperties.getInstance()
    +      .addProperty(CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT, "yyyy/MM/dd HH:mm:ss")
    +      .addProperty(CarbonCommonConstants.CARBON_DATE_FORMAT, "yyyy/MM/dd")
    +      .addProperty(CarbonCommonConstants.ENABLE_UNSAFE_COLUMN_PAGE_LOADING, "true")
    +      .addProperty(CarbonCommonConstants.DEFAULT_CARBON_MAJOR_COMPACTION_SIZE, "0.02")
    +
    +    import org.apache.spark.sql.CarbonSession._
    +    if (args.length != 4) {
    +      logger.error("Usage: java CarbonS3Example <access-key> <secret-key>" +
    +                   "<carbon store location> <spark-master>")
    --- End diff --
   
    arg(2) is table path, not store path, right?


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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user jatin9896 commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1805#discussion_r161669078
 
    --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/S3Example.scala ---
    @@ -0,0 +1,151 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.carbondata.examples
    +
    +import java.io.File
    +
    +import org.apache.hadoop.fs.s3a.Constants.{ACCESS_KEY, SECRET_KEY}
    +import org.apache.spark.sql.SparkSession
    +import org.slf4j.{Logger, LoggerFactory}
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants
    +import org.apache.carbondata.core.util.CarbonProperties
    +
    +object S3Example {
    +
    +  /**
    +   * This example demonstrate usage of s3 as a store.
    +   *
    +   * @param args require three parameters "Access-key" "Secret-key"
    +   *             "s3 bucket path" "spark-master"
    +   */
    +
    +  def main(args: Array[String]) {
    +    val rootPath = new File(this.getClass.getResource("/").getPath
    +                            + "../../../..").getCanonicalPath
    +    val path = s"$rootPath/examples/spark2/src/main/resources/data1.csv"
    +    val logger: Logger = LoggerFactory.getLogger(this.getClass)
    +    CarbonProperties.getInstance()
    +      .addProperty(CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT, "yyyy/MM/dd HH:mm:ss")
    +      .addProperty(CarbonCommonConstants.CARBON_DATE_FORMAT, "yyyy/MM/dd")
    +      .addProperty(CarbonCommonConstants.ENABLE_UNSAFE_COLUMN_PAGE_LOADING, "true")
    +      .addProperty(CarbonCommonConstants.DEFAULT_CARBON_MAJOR_COMPACTION_SIZE, "0.02")
    +
    +    import org.apache.spark.sql.CarbonSession._
    +    if (args.length != 4) {
    +      logger.error("Usage: java CarbonS3Example <access-key> <secret-key>" +
    +                   "<carbon store location> <spark-master>")
    --- End diff --
   
    you are right. ok I will change it to tablepath.


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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1805#discussion_r161673730
 
    --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/S3Example.scala ---
    @@ -0,0 +1,151 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.carbondata.examples
    +
    +import java.io.File
    +
    +import org.apache.hadoop.fs.s3a.Constants.{ACCESS_KEY, SECRET_KEY}
    +import org.apache.spark.sql.SparkSession
    +import org.slf4j.{Logger, LoggerFactory}
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants
    +import org.apache.carbondata.core.util.CarbonProperties
    +
    +object S3Example {
    +
    +  /**
    +   * This example demonstrate usage of s3 as a store.
    +   *
    +   * @param args require three parameters "Access-key" "Secret-key"
    +   *             "s3 bucket path" "spark-master"
    +   */
    +
    --- End diff --
   
    remove empty line


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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1805#discussion_r161674491
 
    --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/S3Example.scala ---
    @@ -0,0 +1,151 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.carbondata.examples
    +
    +import java.io.File
    +
    +import org.apache.hadoop.fs.s3a.Constants.{ACCESS_KEY, SECRET_KEY}
    +import org.apache.spark.sql.SparkSession
    +import org.slf4j.{Logger, LoggerFactory}
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants
    +import org.apache.carbondata.core.util.CarbonProperties
    +
    +object S3Example {
    +
    +  /**
    +   * This example demonstrate usage of s3 as a store.
    --- End diff --
   
    Change to
    > This example demonstrate usage of
    > 1. create carbon table with storage location on object based storage like AWS S3, Huawei OBS, etc
    > 2. load data into carbon table, the generated file will be stored on object based storage
    > 3. query the table.
    > With the indexing feature of carbondata, the data read from object based storage is minimum, thus providing both high performance analytic and low cost storage


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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1805#discussion_r161675090
 
    --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/S3Example.scala ---
    @@ -0,0 +1,151 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.carbondata.examples
    +
    +import java.io.File
    +
    +import org.apache.hadoop.fs.s3a.Constants.{ACCESS_KEY, SECRET_KEY}
    +import org.apache.spark.sql.SparkSession
    +import org.slf4j.{Logger, LoggerFactory}
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants
    +import org.apache.carbondata.core.util.CarbonProperties
    +
    +object S3Example {
    +
    +  /**
    +   * This example demonstrate usage of s3 as a store.
    +   *
    +   * @param args require three parameters "Access-key" "Secret-key"
    +   *             "s3 bucket path" "spark-master"
    +   */
    +
    +  def main(args: Array[String]) {
    +    val rootPath = new File(this.getClass.getResource("/").getPath
    +                            + "../../../..").getCanonicalPath
    +    val path = s"$rootPath/examples/spark2/src/main/resources/data1.csv"
    +    val logger: Logger = LoggerFactory.getLogger(this.getClass)
    +    CarbonProperties.getInstance()
    +      .addProperty(CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT, "yyyy/MM/dd HH:mm:ss")
    +      .addProperty(CarbonCommonConstants.CARBON_DATE_FORMAT, "yyyy/MM/dd")
    +      .addProperty(CarbonCommonConstants.ENABLE_UNSAFE_COLUMN_PAGE_LOADING, "true")
    +      .addProperty(CarbonCommonConstants.DEFAULT_CARBON_MAJOR_COMPACTION_SIZE, "0.02")
    --- End diff --
   
    remove unnecssary property setting, all these are not required


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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1805#discussion_r161675648
 
    --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/S3Example.scala ---
    @@ -0,0 +1,151 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.carbondata.examples
    +
    +import java.io.File
    +
    +import org.apache.hadoop.fs.s3a.Constants.{ACCESS_KEY, SECRET_KEY}
    +import org.apache.spark.sql.SparkSession
    +import org.slf4j.{Logger, LoggerFactory}
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants
    +import org.apache.carbondata.core.util.CarbonProperties
    +
    +object S3Example {
    +
    +  /**
    +   * This example demonstrate usage of s3 as a store.
    +   *
    +   * @param args require three parameters "Access-key" "Secret-key"
    +   *             "s3 bucket path" "spark-master"
    +   */
    +
    +  def main(args: Array[String]) {
    +    val rootPath = new File(this.getClass.getResource("/").getPath
    +                            + "../../../..").getCanonicalPath
    +    val path = s"$rootPath/examples/spark2/src/main/resources/data1.csv"
    +    val logger: Logger = LoggerFactory.getLogger(this.getClass)
    +    CarbonProperties.getInstance()
    +      .addProperty(CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT, "yyyy/MM/dd HH:mm:ss")
    +      .addProperty(CarbonCommonConstants.CARBON_DATE_FORMAT, "yyyy/MM/dd")
    +      .addProperty(CarbonCommonConstants.ENABLE_UNSAFE_COLUMN_PAGE_LOADING, "true")
    +      .addProperty(CarbonCommonConstants.DEFAULT_CARBON_MAJOR_COMPACTION_SIZE, "0.02")
    +
    +    import org.apache.spark.sql.CarbonSession._
    +    if (args.length != 4) {
    +      logger.error("Usage: java CarbonS3Example <access-key> <secret-key>" +
    +                   "<table-path> <spark-master>")
    +      System.exit(0)
    +    }
    +
    +    val (accessKey, secretKey) = getKeyOnPrefix(args(2))
    +    val spark = SparkSession
    +      .builder()
    +      .master(args(3))
    +      .appName("S3Example")
    +      .config("spark.driver.host", "localhost")
    +      .config(accessKey, args(0))
    +      .config(secretKey, args(1))
    +      .getOrCreateCarbonSession()
    +
    +    spark.sparkContext.setLogLevel("INFO")
    +
    +    spark.sql(
    +      s"""
    +         | CREATE TABLE if not exists carbon_table(
    +         | shortField SHORT,
    +         | intField INT,
    +         | bigintField LONG,
    +         | doubleField DOUBLE,
    +         | stringField STRING,
    +         | timestampField TIMESTAMP,
    +         | decimalField DECIMAL(18,2),
    +         | dateField DATE,
    +         | charField CHAR(5),
    +         | floatField FLOAT
    +         | )
    +         | STORED BY 'carbondata'
    +         | LOCATION '${ args(2) }'
    +         | TBLPROPERTIES('SORT_COLUMNS'='', 'DICTIONARY_INCLUDE'='dateField, charField')
    +       """.stripMargin)
    +
    +    spark.sql(
    +      s"""
    +         | LOAD DATA LOCAL INPATH '$path'
    +         | INTO TABLE carbon_table
    +         | OPTIONS('HEADER'='true')
    +       """.stripMargin)
    +
    +    spark.sql(
    +      s"""
    +         | LOAD DATA LOCAL INPATH '$path'
    +         | INTO TABLE carbon_table
    +         | OPTIONS('HEADER'='true')
    +       """.stripMargin)
    +
    +    spark.sql(
    +      s"""
    +         | LOAD DATA LOCAL INPATH '$path'
    +         | INTO TABLE carbon_table
    +         | OPTIONS('HEADER'='true')
    +       """.stripMargin)
    +
    +    spark.sql(
    +      s"""
    +         | LOAD DATA LOCAL INPATH '$path'
    +         | INTO TABLE carbon_table
    +         | OPTIONS('HEADER'='true')
    +       """.stripMargin)
    +
    +    spark.sql("ALTER table carbon_table compact 'MINOR'")
    --- End diff --
   
    Add a comment:
    > // Use compaction command to merge segments or small files in object based storage, this can be done periodically.


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[GitHub] carbondata pull request #1805: [CARBONDATA-1827] S3 Carbon Implementation

qiuchenjian-2
In reply to this post by qiuchenjian-2
Github user jackylk commented on a diff in the pull request:

    https://github.com/apache/carbondata/pull/1805#discussion_r161675737
 
    --- Diff: examples/spark2/src/main/scala/org/apache/carbondata/examples/S3CsvExample.scala ---
    @@ -0,0 +1,111 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *    http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.carbondata.examples
    +
    +import java.io.File
    +
    +import org.apache.hadoop.fs.s3a.Constants.{ACCESS_KEY, SECRET_KEY}
    +import org.apache.spark.sql.SparkSession
    +import org.slf4j.{Logger, LoggerFactory}
    +
    +import org.apache.carbondata.core.constants.CarbonCommonConstants
    +import org.apache.carbondata.core.util.CarbonProperties
    +
    +object S3CsvExample {
    +
    +  /**
    +   * This example demonstrate to create local store and load data from CSV files on S3
    +   *
    +   * @param args require three parameters "Access-key" "Secret-key"
    +   *             "s3 path to csv" "spark-master"
    +   */
    +
    +  def main(args: Array[String]) {
    +    val rootPath = new File(this.getClass.getResource("/").getPath
    +                            + "../../../..").getCanonicalPath
    +    val logger: Logger = LoggerFactory.getLogger(this.getClass)
    +
    +    CarbonProperties.getInstance()
    +      .addProperty(CarbonCommonConstants.CARBON_TIMESTAMP_FORMAT, "yyyy/MM/dd HH:mm:ss")
    +      .addProperty(CarbonCommonConstants.CARBON_DATE_FORMAT, "yyyy/MM/dd")
    +      .addProperty(CarbonCommonConstants.ENABLE_UNSAFE_COLUMN_PAGE_LOADING, "true")
    --- End diff --
   
    remove unnecssary property setting, all these are not required


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