On Fri, Aug 09, 2013 at 11:35:33PM +0200, Kai Krakow wrote:
Josef Bacik jba...@fusionio.com schrieb:
So I guess the reason that ZFS does well with that workload is that
ZFS is using smaller blocks, maybe just 512B ?
Yeah I'm not sure what ZFS does, but if you are writing over a block
Phoronix periodically runs benchmarks on filesystems, and one thing I
have noticed is that btrfs always does terribly on their fio Intel
IOMeter fileserver access pattern benchmark:
http://www.phoronix.com/scan.php?page=articleitem=linux_310_10fsnum=2
Here, btrfs is more than 6 times slower than
On Thu, Aug 08, 2013 at 09:13:04AM -0700, John Williams wrote:
Phoronix periodically runs benchmarks on filesystems, and one thing I
have noticed is that btrfs always does terribly on their fio Intel
IOMeter fileserver access pattern benchmark:
What is going on here? Why is btrfs doing so poorly?
Funny thing, I was thinking exactly the same when reading the article ;)
Regards
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On Thu, Aug 08, 2013 at 09:13:04AM -0700, John Williams wrote:
Phoronix periodically runs benchmarks on filesystems, and one thing I
have noticed is that btrfs always does terribly on their fio Intel
IOMeter fileserver access pattern benchmark:
On Thu, Aug 8, 2013 at 12:40 PM, Josef Bacik jba...@fusionio.com wrote:
On Thu, Aug 08, 2013 at 09:13:04AM -0700, John Williams wrote:
Phoronix periodically runs benchmarks on filesystems, and one thing I
have noticed is that btrfs always does terribly on their fio Intel
IOMeter fileserver
On Thu, Aug 08, 2013 at 01:23:22PM -0700, John Williams wrote:
On Thu, Aug 8, 2013 at 12:40 PM, Josef Bacik jba...@fusionio.com wrote:
On Thu, Aug 08, 2013 at 09:13:04AM -0700, John Williams wrote:
Phoronix periodically runs benchmarks on filesystems, and one thing I
have noticed is that
On Aug 8, 2013, at 2:23 PM, John Williams jwilliams4...@gmail.com wrote:
So I guess the reason that ZFS does well with that workload is that
ZFS is using smaller blocks, maybe just 512B ?
Likely. It uses a variable block size.
I wonder how common these type of non-4K aligned workloads
I also don't know if any common use fs has an optimization whereby
just the modified sector(s) is overwritten, rather than all sectors
making up the file system block being modified.
Most of them do. The generic direct io path allows sector sized dio.
The very first bit of
