Bug#776701: ssd-test 1g file size too small
Hello Daniel, hi Jens,
Am Samstag, 31. Januar 2015, 14:23:34 schrieb Daniel Pocock:
Quoted 15 lines
Package: fio
Version: 2.1.11-2
Severity: importantIn the ssd-test sample config:
https://sources.debian.net/src/fio/2.1.11-2/examples/ssd-test.fio/
The test size is 1GB, this line:
size=1g
Quoted 6 lines
There are SSDs that have 1g caches and this leads to unhelpful results.
One user I discussed this with had to use a 10g test file to get consistent and meaningful results.
Maybe bump the example to 10g or add a comment in front of that line.
As the examples are taken from the upstream tarball, I suggest taking this upstream. I put upstream in Cc, Jens, what do you think about this?
In any case, I don´t think its a release critical issue for Jessie. And I would like to avoid carrying a patch for this.
Also for SSD testing have a look at the (destructive, whole device) steady state test and
https://www.thomas-krenn.com/de/wiki/TKperf
I view the ssd-test.fio as a simple example that may serve to give a *first* idea, but is in no way complete in any way. Yes, it may be good to point this out in the comment that this is just a starting point.
And yes, its always good to check results for meaningfulness. No comment or warranty clause in an example file is going to cover for that. No benchmark can provide such a warranty for all cases. There are just too many factors at play.
Upstream version of fio is 2.1.14. I may look into packaging it, after I recovered from my recent disappointments with how listmasters in Debian handled discussions about systemd within Debian[1]. Feel free to be faster than me as, honestly, my motivation isn´t that high at the moment. I did not yet want to orphan the package in order to give it some time and pick it up again, but if you want, feel free to take over maintenance to speed things. Or as its on collab-maint anyway, just feel free to work on it. I think in some months, after Jessie release, I may look into my packagings again (while staying unsubscribed from certain mailing lists), as it used to be fun working on it.
I think what I have in the repo is current.
No need to discuss any of this in this bug report, this is just for your information.
[1] https://lists.debian.org/debian-devel/2014/12/msg00000.html (I still didn´t even look at any possible responses to what I wrote and I do not intend to do so.)
Thanks,
Martin
Signature · 14 lines
Martin Steigerwald | Consultant / Trainer teamix GmbH Südwestpark 43 90449 Nürnberg Tel.: +49 911 30999 55 | Fax: +49 911 30999 99 mail: [email protected] | web: http://www.teamix.de | blog: http://blog.teamix.de Amtsgericht Nürnberg, HRB 18320 | Geschäftsführer: Oliver Kügow, Richard Müller ***Nicht verpassen: TechDemo Hochverfügbare Storage-Infrastruktur*** Nürnberg 25.02.15 | München 26.02.15 | Jetzt anmelden unter: www.teamix.de/techdemo
Quoted 20 lines · Martin Steigerwald
Hello Daniel, hi Jens,
Am Samstag, 31. Januar 2015, 14:23:34 schrieb Daniel Pocock:
Quoted 17 lines
Package: fio
Version: 2.1.11-2
Severity: importantIn the ssd-test sample config:
https://sources.debian.net/src/fio/2.1.11-2/examples/ssd-test.fio/
The test size is 1GB, this line:
size=1g
There are SSDs that have 1g caches and this leads to unhelpful results.
Quoted 7 lines
Quoted 4 lines
One user I discussed this with had to use a 10g test file to get consistent and meaningful results.
Maybe bump the example to 10g or add a comment in front of that line.
As the examples are taken from the upstream tarball, I suggest taking this upstream. I put upstream in Cc, Jens, what do you think about this?
Sure, that sounds fine to me. 1G is tiny by todays standards, 10G would be a lot more reasonable. I'll commit that change.
Signature · 1 line
Jens Axboe
Am Montag, 16. Februar 2015, 15:04:03 schrieb Jens Axboe:
Quoted 25 lines · Martin Steigerwald
Quoted 24 lines
Hello Daniel, hi Jens,
Am Samstag, 31. Januar 2015, 14:23:34 schrieb Daniel Pocock:
Quoted 21 lines
Package: fio
Version: 2.1.11-2
Severity: importantIn the ssd-test sample config:
https://sources.debian.net/src/fio/2.1.11-2/examples/ssd-test.fio/
The test size is 1GB, this line:
size=1g
There are SSDs that have 1g caches and this leads to unhelpful results.
One user I discussed this with had to use a 10g test file to get consistent and meaningful results.
Quoted 7 lines
Quoted 5 lines
Quoted 1 line
Maybe bump the example to 10g or add a comment in front of that line.
As the examples are taken from the upstream tarball, I suggest taking this upstream. I put upstream in Cc, Jens, what do you think about this?
Sure, that sounds fine to me. 1G is tiny by todays standards, 10G would be a lot more reasonable. I'll commit that change.
Great. I think I will look into packaging latest fio upstream one of the next weeks.
(sorry for long sig, can´t disable it)
Signature · 14 lines
Martin Steigerwald | Consultant / Trainer teamix GmbH Südwestpark 43 90449 Nürnberg Tel.: +49 911 30999 55 | Fax: +49 911 30999 99 mail: [email protected] | web: http://www.teamix.de | blog: http://blog.teamix.de Amtsgericht Nürnberg, HRB 18320 | Geschäftsführer: Oliver Kügow, Richard Müller ***Nicht verpassen: TechDemo Hochverfügbare Storage-Infrastruktur*** Nürnberg 25.02.15 | München 26.02.15 | Jetzt anmelden unter: www.teamix.de/techdemo