% State of Art : Where we are with the Ext3 filesystem? % Mingming Cao (cmm@us.ibm.com) There has been a lot of ext3 filesystem development work during the past two years toward making ext3 an outstanding filesystem. In this paper, we discuss some features like directory indexing, block reservation and on- line resizing, which have been accepted in the mainline kernel recently. We also discuss those features implemented but not yet incorporated into the mainline kernel, such as extent maps, delayed allocation and multiple block allocation. We further include an overview of implementation and performance improvements for some of these features. Finally, we review some features which are still on the drawing board.