Top "Cluster-computing" questions

A computer cluster is a set of connected systems that work together so that in many respects they can be viewed as a single system.

How to set amount of Spark executors?

How could I configure from Java (or Scala) code amount of executors having SparkConfig and SparkContext? I see constantly 2 executors. …

java scala cluster-computing apache-spark yarn
Difference between Clustering and Load balancing?

What is the difference between Clustering and Load balancing? I know it is a simple question.But I asked this …

java tomcat web-applications cluster-computing
ZooKeeper alternatives? (cluster coordination service)

ZooKeeper is a highly available coordination service for data centers. It originated in the Hadoop project. One can implement locking, …

locking cluster-computing high-availability heartbeat apache-zookeeper
How to add a new node to my Elasticsearch cluster

My cluster has a yellow health as it has only one single node, so the replicas remain unasigned simply because …

elasticsearch cluster-computing replication
how to specify error log file and output file in qsub

I have a qsub script as #####----submit_job.sh---##### #!/bin/sh #$ -N job1 #$ -t 1-100 #$ -cwd SEEDFILE=/home/user1/data1 …

bash cluster-computing qsub sungridengine
Starting Zookeeper Cluster. Error: Could not find or load main class org.apache.zookeeper.server.quorum.QuorumPeerMain

(I'm running on CentOS 5.8). I've been following the direction for a Clustered (Multiserver) Zookeeper Set-up, but getting an error when …

apache cluster-computing apache-zookeeper
What are the scenarios for using mirroring, log shipping, replication and clustering in SQL Server

As far as i know SQL Server provides 4 techniques for better availability. I think these are the primary usage scenarios, …

sql-server replication cluster-computing mirroring
Cloud virtual machines available for free for open source testing?

Anyone know about places in the cloud where you can create (virtual) machines (like Amazon EC2) to use for your …

open-source virtual-machine cluster-computing distributed-computing
Singleton in Cluster environment

What is the best strategy to refactor a Singleton object to a cluster environment? We use Singleton to cache some …

java singleton websphere cluster-computing
Scaling solutions for MySQL (Replication, Clustering)

At the startup I'm working at we are now considering scaling solutions for our database. Things get somewhat confusing (for …

mysql replication scaling cluster-computing database-cluster