Ext3 Journalling filesystem

• Filesystem journalling is required for an enterprise class server system

• Need data integrity and fast recovery after crash

• When we started, journalling FSs were new to Linux

• Threw away reiserfs due to filesystem corruption

• Ext3 is fast, reliable and built on proven 10+ year old technology

• Other free alternatives such as JFS and XFS

• Big savings compared to expensive proprietary solutions such as Veritas used on Big Metal systems