Re: [gentoo-user] SSD partitioning and migration

[Bruce Hill <daddy@happypenguincomputers.com>]

On Fri, Jul 19, 2013 at 08:34:31PM -0300, luis jure wrote:
> on 2013-07-19 at 17:11 Bruce Hill wrote:
> 
> > Do some meaningful benchmark...
> > 
> > emerge -ajv app-benchmarks/bonnie++ && bonnie++ -d /tmp -u root
> > 
> > then post us your output.
> 
> mmm... /tmp is on the root partition that's only about 40 Gb (in my old
> HDD / was 30Gb, and that was enough, but sometimes i had to clean a bit to
> compile libreoffice, that checks for 6Gb free).
> 
> apparently that's not enough for bonnie++ to run, so i mounted the other
> partition in the SSD and performed the benchmark there. 
> 
> here's the result :
> 
> 
> Using uid:0, gid:0.
> Writing a byte at a time...done
> Writing intelligently...done
> Rewriting...done
> Reading a byte at a time...done
> Reading intelligently...done
> start 'em...done...done...done...done...done...
> Create files in sequential order...done.
> Stat files in sequential order...done.
> Delete files in sequential order...done.
> Create files in random order...done.
> Stat files in random order...done.
> Delete files in random order...done.
> Version  1.97       ------Sequential Output------ --Sequential Input-
> --Random- Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr-
> --Block-- --Seeks-- Machine        Size K/sec %CP K/sec %CP K/sec %CP
> K/sec %CP K/sec %CP  /sec %CP acme7        24016M   571  98 261698  22
> 133029  14  4272  99 287927  12  8057  53 Latency             23779us
> 78780us     591ms    2378us   51825us     892ms Version  1.97
> ------Sequential Create------ --------Random Create--------
> acme7               -Create-- --Read--- -Delete-- -Create-- --Read---
> -Delete-- files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec
> %CP 16 18593  19 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++
> Latency              2033us     419us    1322us     109us       4us
> 33us
> 1.97,1.97,acme7,1,1374260412,24016M,,571,98,261698,22,133029,14,4272,99,287927,12,8057,53,16,,,,,18593,19,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++,23779us,78780us,591ms,2378us,51825us,892ms,2033us,419us,1322us,109us,4us,33us
> 
> 
> can you read that? i'm afraid i don't know much what those numbers mean in
> terms of performance...

Here's the definitive guide on how to understand it:

https://blogs.oracle.com/roch/entry/decoding_bonnie

Anyway, now you've got something to compare different disks on your hardware.

Cheers,
Bruce
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