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Oracle RAC

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Oracle has declined to patch a critical vulnerability in its flagship database product, leaving customers vulnerable to attacks that siphon confidential information from corporate servers and execute malware on backend systems, a security researcher said.

Virtually all versions of the Oracle Database Server released in the past 13 years contain a bug that allows hackers to perform man-in-the-middle attacks that monitor all data passing between the server and end users who are connected to it. That's what Joxean Koret, a security researcher based in Spain, told Ars. The "Oracle TNS Poison" vulnerability, as he has dubbed it, resides in the Transparent Network Substrate Listener, which routes connections between clients and the database server. Koret said Oracle learned of the bug in 2008 and indicated in a recent e-mail that it had no plans to fix current supported versions of the enterprise product because of concerns it could cause "regressions" in the code base.

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Question: Can you give me more information on how to set up MySQL cluster?

Answer: Sure, below are the links to extremely informative Internet resources providing detailed guides on why and how to deploy MySQL cluster.

By the way a cluster in IT field is a group of linked computers, working together so they form a single computing system. The components of a cluster are usually connected to each other via fast local area networks. Clusters are usually deployed to improve performance and/or availability over that provided by a single computer, while typically being much more cost-effective than single computers of comparable speed or availability.

1. http://dev.mysql.com/doc/refman/5.0/en/mysql-cluster.html

MySQL Cluster is a high-availability, high-redundancy version of MySQL adapted for the distributed computing environment. It uses the NDBCLUSTER storage engine to enable running several MySQL servers in a cluster. This storage engine is available in MySQL 5.0 binary releases and in RPMs compatible with most modern Linux distributions.

2. Mysql Cluster: The definitive HOWTO

3. How To Set Up A Load-Balanced MySQL Cluster

This tutorial shows how to configure a MySQL 5 cluster with three nodes: two storage nodes and one management node. This cluster is load-balanced by a high-availability load balancer that in fact has two nodes that use the Ultra Monkey package which provides heartbeat (for checking if the other node is still alive) and ldirectord (to split up the requests to the nodes of the MySQL cluster).

4. MySQL Cluster Server Setup

MySQL Cluser Server is a fault-tolerant, redundant, scalable database architecture built on the open-source MySQL application, and capable of delivering 99.999% reliability. In this paper we describe the process we used to setup, configure, and test a three-node mySQL cluster server in a test environment.

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