README.md

In arupkamal/ravana: R Library For Distributed Computing

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ravana

The super simple R library for distributed computing using map-reduce.

Setup

1. Install PostgreSQL 13 or greater from https://www.enterprisedb.com/downloads/postgres-postgresql-downloads

1. Install ravana package by using this command in R: devtools::install_github("arupkamal/ravana")

2. Create the Ravana database by running this SQL: https://github.com/arupkamal/ravana/blob/main/Database%20Setup/01_database_setup.sql

3. Create the Ravana user by running this SQL: https://github.com/arupkamal/ravana/blob/main/Database%20Setup/02_role_setup.sql

4. Create the Ravana tables by running this SQL: https://github.com/arupkamal/ravana/blob/main/Database%20Setup/03_table_setup.sql

5. Create the Ravana functions by running this SQL: https://github.com/arupkamal/ravana/blob/main/Database%20Setup/04_function_setup.sql

Getting started

Setting up a Cluster

1. Install R in the master node.

2. Install ravana package by using this command in R: devtools::install_github("arupkamal/ravana")

3. Create the ravana.R file with the following code:

library(ravana)

init_cluster('Ravana', settingspath  = 'C:/R')
is_prime <- function(n) {
    n == 2L || all(n %% 2L:max(2,floor(sqrt(n))) != 0)
    }
check these numebers if they are primes
numbers_to_check <- seq(1000001, 1010001, 2)
share the function in the cluster
share_function(is_prime)
share the object in the cluster
share_object(numbers_to_check)
taskid <- ravana_map(is_prime, numbers_to_check)
res = ravana_reduce(taskid)
print all the Prime numbers found through this process
print(res[res$mappedresults==TRUE,]$mappedparameters)

Setting up a Worker node

1. Install R in the worker node.

1. Install ravana package by using this command in R: devtools::install_github("arupkamal/ravana")

2. Create the worker.R file with the following code:

  library(ravana)
  init_cluster('Ravana', settingspath  = 'C:/R')
  set_worker()
  run_worker()
  disconnect()
  

arupkamal/ravana documentation built on Dec. 19, 2021, 5:34 a.m.