[mythtv-users] How many simultaneous recordings on one drive?

[Kris B.]

On Wednesday, September 28, 2011 4:29 PM, "Eric Sharkey"
<eric at lisaneric.org> wrote:
> On Wed, Sep 28, 2011 at 4:22 PM, belcampo <belcampo at zonnet.nl> wrote:
> > On 09/28/2011 06:50 PM, Eric Sharkey wrote:
> >> If you have doubts, test it out.  Most linux distributions ship a disk
> >> benchmarking suite called bonnie (or bonnie++).  Run it on your
> >> hardware and see what your actual measured maximum performance is.
> > Mythtv recording + update mythconverg isn't a typical database
> > application, which is what bonnie++ is testing, at least AFAIK
> 
> bonnie++ runs a variety of different tests to simulate a variety of
> different kinds of workloads.  It isn't a single benchmark.
> 
> Eric
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> 
I am not quite sure how to read my results, does this mean my Myth drive
can handle 98/mbs?:

Results for OS Drive:
Version  1.96       ------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
localhost.locald 4G   251  89 45282  18 22993   7   562  63 76175  10
174.6   5
Latency             90914us     521ms    1416ms   97811us     277ms    
204ms
Version  1.96       ------Sequential Create------ --------Random
Create--------
localhost.localdoma -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP 
              /sec %CP
                 16  1670  87 +++++ +++ +++++ +++  1656  85 +++++ +++ 
                 4142  82
Latency             19728us    5890us    6664us   20510us     236us  
41276us



Results for Myth Drive:
Version  1.96       ------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
localhost.locald 4G   493  82 98341  22 33124  10   886  91 123012  18
133.8   3
Latency             54205us     748ms     648ms   22987us   37155us    
269ms
Version  1.96       ------Sequential Create------ --------Random
Create--------
localhost.localdoma -Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP 
              /sec %CP
                 16   238   2 +++++ +++   128   1   125   1 +++++ +++  
                 104   1
Latency               276ms    5982us     265ms     302ms    6891us    
374ms




-- 
  Kris B.
  krisbee at krisbee.com