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EXT4, Btrfs, NILFS2 Performance Benchmarks

Jun 29, 2009, 19:04 (0 Talkback[s])
(Other stories by Michael Larabel)

[ Thanks to Michael Larabel for this link. ]

"Before we begin, here is a quick summary of these three new file-systems. EXT4 is the successor to EXT3 and this file-system can now support volumes up to 1 Exabyte, introduces Extents to replace traditional block mapping, supports persistent pre-allocation and delayed allocation for improving performance, brings journal check-summing to the EXT family, and file-system checking is faster under EXT4. Previously we delivered real-world benchmarks of EXT4 and found it to be a nice performance step above EXT3 in a majority of the tests. Install-time support for EXT4 was introduced with Ubuntu 9.04. EXT3 has been in the Linux kernel since 2001 and is what a majority of the Linux desktop distributions had been using as the default file-system.

"The Btrfs file-system has yet to be stabilized and is currently at version 0.19 with its on-disk format not yet being finalized. Btrfs supports online defragmentation, an SSD optimized mode, copy-on-write logging, zlib compression, object-level mirroring and stripping, sub-volumes, and writable snapshots. A few months back we delivered Btrfs benchmarks with support for this file-system now being available through Red Hat's Anaconda installer in Fedora 11. These benchmarks found Btrfs to perform well in some areas, but there's a lot left to be desired."

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