Spring Data GemFire GemfireTemplate

As with many other high-level abstractions provided by the Spring projects, Spring Data GemFire provides a template that simplifies GemFire data access. The class provides several one-line methods, for common region operations but also the ability to execute code against the native GemFire API without having to deal with GemFire (more...)

Functions in GemFire

You can execute data-independent functions or data-dependent functions in vFabric GemFire. You run data-independent functions by targeting a specific member or specific members in your distributed system, or by targeting logical member groups on which to execute your function. If you are executing a data-dependent function, you specify a region (more...)

Check which JDK’s Installed on MAC Os X

Note for myself:

[Mon Sep 23 08:16:42 papicella@:~ ] $ /usr/libexec/java_home -V
Matching Java Virtual Machines (4):
    1.7.0_25, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_25.jdk/Contents/Home
    1.7.0_12, x86_64: "Java SE 7" /Library/Java/JavaVirtualMachines/jdk1.7.0_12.jdk/Contents/Home
    1.6.0_51-b11-457, x86_64: "Java (more...)

Using Scala to connect to Greenplum

In this demo we use a basic Scala program to connect to Greenplum using the Postgres JDBC driver.

1. Create a scala program as shown below.

import java.sql.DriverManager
import java.sql.Connection

object ScalaGreenplumDemo {

  def main(args: Array[String]) {
    val driver = "org.postgresql.Driver"
    val  (more...)

Spring JDBC with PivotalHD and Hawq

HAWQ enables SQL for Hadoop ensuring we can use something like Spring JDBC as shown below. In this example we use the PivotalHD VM with data from a HAWQ append only table as shown below.

gpadmin=# \dt
                             List of relations
   Schema    |            Name             | Type  |  Owner  |   Storage   

Greenplum external table accessing GemFire region

To complete the Greenplum external table blogs , the last one I was created is an external table querying GemFire region data as shown below.

Previous Blogs



External Table Querying GemFire region


cd /Users/gpadmin/demos/gemfire-externaltable

source env_setup.sh

java (more...)

Using Oracle’s SQLPlus with Greenplum external tables

I previously blogged about using a java client to access oracle tables from Greenplum external tables. That demo below is handy for any SQL or RDBMS so a generic solution.


Here is a simpler example this time using sqlplus knowing I am only accessing oracle (more...)