Linked by diegocg on Thu 7th Nov 2013 22:19 UTC
Linux Linux kernel 3.12 has been released. This release includes support for offline deduplication in Btrfs, automatic GPU switching in laptops with dual GPUs, a performance boost for AMD Radeon graphics, better RAID-5 multicore performance, improved handling of out-of-memory situations, improvements to the timerless multitasking mode, separate modesetting and rendering device nodes in the graphics DRM layer, improved locking performance for virtualized guests, XFS directory recursion scalability improvements, new drivers and many small improvements. Here's the full list of changes.
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RE[3]: Btrfs dedup
by jessesmith on Fri 8th Nov 2013 21:12 UTC in reply to "RE[2]: Btrfs dedup"
jessesmith
Member since:
2010-03-11

I have been running ZFS on Linux boxes with standard kernels for over a year. Using the ZFS kernel module (or ZFS-FUSE) does not require a custom kernel.

Reply Parent Score: 3

RE[4]: Btrfs dedup
by Alfman on Fri 8th Nov 2013 23:12 in reply to "RE[3]: Btrfs dedup"
Alfman Member since:
2011-01-28

jessesmith,

"I have been running ZFS on Linux boxes with standard kernels for over a year. Using the ZFS kernel module (or ZFS-FUSE) does not require a custom kernel."

Thanks for the suggestion. The problem with fuse is that it doesn't offer good performance. In some benchmarks, Fuse-ZFS barely registers on the chart.

www.phoronix.com/scan.php?page=article&item=zfs_fuse_performance

This link is somewhat dated, but it's never the less been my experience that ALL fuse filesystems suffer from excessively high CPU utilization and low performance, particularly under high concurrency, and the benchmarks here bear that out. I find it unlikely that a recent benchmark would be any kinder to Fuse-ZFS. I may be convinced to go with ZFS, but if I do it will definitely be a patched kernel. That's not to say fuse-zfs isn't useful for it's features, it would just defeat the point in my having a high performance raid array.

Btrfs is also compared in the link above for anyone interested (I wouldn't be surprised if it has improved since 2010).

Edited 2013-11-08 23:13 UTC

Reply Parent Score: 2

RE[5]: Btrfs dedup
by phoenix on Sat 9th Nov 2013 00:09 in reply to "RE[4]: Btrfs dedup"
phoenix Member since:
2005-07-11

He said to use the ZFSonLinux kernel modules, not FUSE modules. Several distro now include ZFSonLinux packages in their repos, and more are available on their website. No custom kernel required, and no loss of performance due to FUSE.

Reply Parent Score: 4