Introduction
Today's businesses have put increasing demands on storage and high database
performance has become the standard requirement nowadays. These ever
increasing demands on storage, present significant challenges in meeting high
availability and high performance requirements. One such challenge is to
reduce time taken by backups. Backups are being taken frequently due to ever
increasing critical data; storage performance suffer severely during backups.
A number of proprietary softwares have come up with the solutions to above
problem.
LinSysSoft Technologies has taken up the challenge to incorporate Checkpoint
and Block Level Incremental Backup (BLIB) support in the open source's Ext3
File System, which is very well known for its stability, to create a new file
system called CheckFS. Block Level Incremental Backup enables truly efficient
backup and restore mechanisms. Checkpoints provide administrators to create
point-in-time copies of a live file system by keeping track of the data blocks
modified in real time. This document provides an overview of checkpoint
technology for ext3 file system and how it enables Block Level Incremental
Backup (BLIB) and takes it's advantage for high recoverability and
performance.