virtualization

New Software to Extend Database Virtualization {Comments Off on New Software to Extend Database Virtualization}

by Tseng H. K.
The article I read this week is “Delphix 3.0 Extends Database Virtualization Platform with Microsoft SQL Server and Oracle RAC Support” from PW Newswire on October 15, 2012. The author wrote this study to announce Delphix who is the leader in agile data management industry, has announced their new version of virtualization platform, Delphix3.0. With their lastest release, the company can virtualized almost 60% of the current relational database market. To brief learn about company Delphix, Delphix is a company that enables agile data management through their software, and delivers business application to their customers quickly at lowest costs. read more...

Oracle’s 12c DBMS {1}

by Eric C
Scheduled for release in 2013, Oracle recently released details regarding the next generation database management system called Oracle 12c. The “c” stands for cloud, as Oracle is focused on making 12c cloud computing friendly. The main selling point of 12c is the ability to virtualize databases in a sever, or hold many instances of different databases on the same system. This featured is dubbed “multi-tenancy” by Oracle’s CEO Larry Ellison and benefits from decreasing hardware costs for major corporations. If a corporation has many database servers running Oracle’s previous DBMS, 12c can consolidate up to 250 separate databases in one server, thus maximizing CPU usage and reducing hardware needed to run the database. Consolidating multiple databases into one server may impact performance as a result of virtualization, however, Oracle would not comment on how they would combat this issue. Ellison only stated that 12c “uses one-sixth as much hardware and runs five times as many databases.” When it comes to security, Oracle stated 12c will feature enhanced security measures to make sure data are isolated and secured from users of other databases. read more...

Common Threats of Cloud Computing {2}

by Edwin T
The peer reviewed article i chose for this weeks post is about the services that cloud providers are offering that can be potential threats. The article focuses on virtualization and the impact it has on cloud security. As we already know, virtualization means that a single physical machine known as a host can run multiple operating systems at the same time, known as virtual machines. The first threat discussed is VM Hopping. With VM hopping, an attacker has control of one virtual machine and tries to gain control of another. VM hopping is a considerable threat because serveral VM’s can run on the same host making them all targets for the attacker. Another threat that caught my attention was the VM Denial of Service. “VM’s share physical resources, such as CPU, memory disk, and network bandwidth.” DoS in virtualization happens when one machine uses all of the resources. Making the host unable to launch more VMs, preventing the service. One effective way to reduce the occurance of a DoS attack is to limit the resource allocation for each machine. read more...

All databases used as one. {Comments Off on All databases used as one.}

by George A
My article explains a method of how to allow a user to access information from many databases on the internet using XML as if it were one database.  The purpose is to decrease the workload in obtaining information from the internet. It will also help to increase efficiency and save time. Different database types such as relational databases (RDB), object-oriented databases, and XML databases can all be queried using the method stated in the text. The authors call this method the “virtualization” of many databases into a single one. The authors elaborate by stating that databases on the internet as well as business software databases can all be accessed in the same way and integrated in real time using JDBC/SOAP methods. The author’s developed an, “XML conversion program, XML import/export…” The data from a MySQL server for example is converted using the XML export program code identifying parts such as table names, field names, and constraints. The XML import code is used then to allow a user to access the information as a single virtual database with all the other MySQL, PostgreSQL, or SQLServer2005 servers acting as one to the user. This is just one example for conversion using these types of databases. read more...