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In this paper, the authors considers the characteristics and behavior of the modern 64-bit ext4 file system under the Linux operating system, kernel version 2.6. It also provides the performance comparison of ext4 file system with earlier ext3 and ext2 file systems. The work involves mathematical analysis of the file system access time with and without journaling option. The performance is measured using the postmark benchmarking software that simulates the workload of Internet mail server. They have defined three types of workloads, generally dominated by relatively small objects. Test results have shown superiority of modern ext4 file system compared to its predecessors, ext2 and ext3 file systems. Benchmark results are interpreted based on mathematical model of file system access times.
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