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Who cares?
In ten years I have not seen even one mplayer that was not buggy as heck, would not play a [insert almost any container format] file without massaging the heck out it and even then it...

Chris:

I won't be able to test with this partition anymore.
I don't suppose it matters since the WRITE faster than READ issue is exhibited on all drive types here but if you want more tests...

I did get the openSUSE 2.6.33 kernel up to init3 and the dd results were the same: ~ 364MBps.

...and Mandriva's kernel is using different default values than openSUSE.

#> cd...

#> uname -srv
Linux 2.6.32-3-default #1 SMP 2009-12-04 00:41:46 +0100
(openSUSE 11.2)
#> dd if=/dev/sda of=/dev/zero bs=20M skip=25600 count=409 iflag=direct
409+0 records in
409+0 records out...

This is the 2.6.31 kernel(Mandriva 2010.0) result.
#> dd if=/dev/sdf of=/dev/zero bs=20M skip=25600 count=409 iflag=direct
409+0 records in
409+0 records out
8577351680 bytes (8.6 GB) copied,...

Hey Chris,
Did manage to get 2.6.33 on Mandriva running. Ran some iozone tests and are basically the same except both write and read are slower. The gap narrowed a bit as a result.

The odd...

Craft Director Studio can be added to this fairly* long list: http://www.linuxmovies.org/software.html
(*not as long as it needs to be to be dominat ...)

Why? Really. ...

Years ago I would...

Hi, thanks for the post. I am happy to do whatever I can to assist.
The btrfs(which I pronounce "better f s") is, or at least the potential of, a truly world class fs. I thank you and all the...

No. I said:I explained " appreciable " as much as possible. ... The latter part is a fair warning that backups should be done as appropriate for the task at hand or they will not provide the desired...

Hey Chris,
I tried the suggestions of scheduler(deadline), nr_requests and hw_sectors changes.
READ is slower than WRITE by > 70MBps.

Auto Mode
File size set to 8388608 KB
...

Hi Chris,
I have to adjust my Wow! statement of previous post. I could not get to openSUSE (2.6.32 kernel) last night. But today I did; Without changing the readahead value but using noatime and...

You are right that by using " appreciable " loss is left open-ended. Appreciable is dependent upon the value, whether innate or time to produce, as well as quantity.
Some things might be worth a...

Hi Chris,
Thanks for the explanation and suggestion.
Before seeing it, I did try an older Parallel SCSI card, LSI megaRAID 320-2x with some Fujitsu U320 disks in RAID 0. The card has 512MB of BBU...

Hi Chris,
I'm Ric, one of the users excited about the btrfs fs(as geeky as that is).
Thank you for taking the time for development!

I ran IOzone while setting-up a new SAS2 RAID adapter(LSI...

Any appreciable amount data should never be lost. That is what backups are for.
The ability to get snapshots without shutting down the fs is a very important widget in the fs toolset. I find it...

" real-world benchmarks " == oxymoron

:p

I, and anyone ithink, will agree using zeros is not 'real-world' of course but nevertheless it is a baseline, which ithink is what the author/tester...

None of these safer* fs "blow everything else out of the water" ... ext2 would prbly come the closest but who wants to race boats w/o at least a lifejacket so when one gets tossed into the water,...

I have a counter request but want to first say "Thanks" for the efforts taken to provide this update on the improvements being made. If not for Phoronix(Michael et al) we would not have much of...

The last part got cut ....:confused:
It should also say:
But neither is a reality. AFAIK, the diff between any modern fs are very small and certainly nowhere near 150MBps (or 550MBps!).
...

Not to beat on you or anything like that but one needs to realize that there is no such thing as "completely guaranteed safe" for reads|writes.
Typically, safety of data is more dependent upon the...