What is the ARIES Recovery Algorithm ?
Filed Under Recovery, Technical, Transaction | Posted on September 7, 2009
‘Algorithms for Recovery and Isolation Exploiting Semantics’, or ARIES is a recovery algorithm designed to work with a no-force, steal database approach; it is used by IBM DB2, Microsoft SQL Server and many other database systems. Three main principles lie behind ARIES: – Write ahead logging: Any change to an object is first recorded in [...]
Overview of Shadow Paging
Filed Under Explanation, Technical, Terms, Tips | Posted on September 6, 2009
A computer system, like any other mechanical or electrical system is subject to failure. There are a variety of causes, including disk crash, power failure, software errors, a fire in the machine room, or even sabotage. Whatever the cause, information may be lost. The database must take actions in advance to ensure that the atomicity [...]
Quick Tech Tip: Encapsulation – What does it mean ?
Filed Under Definition, Design, Software, Technical, Tips | Posted on July 29, 2009
Encapsulation is not a common word in the English language; however, it is an important phrase in the word of software design, especially in the world of Object Oriented Programming. So what does encapsulation mean ? In computer science, the principle of information hiding means the hiding of design decisions in a computer program, those [...]
Quick Tech Tip: Layer 2 Tunneling protocol : L2TP
Filed Under Network, Technical, Tips | Posted on July 23, 2009
Layer Two Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol (PPTP) used by an Internet service provider (ISP) to enable the operation of a virtual private network (VPN) over the Internet. The two end components that make up L2TP are the L2TP Access Concentrator (LAC) which is the device that physically terminates [...]
