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

Kris B. krisbee at krisbee.com
Thu Sep 29 12:38:12 UTC 2011


On Thursday, September 29, 2011 1:11 PM, "Richard Morton"
<richard.e.morton at gmail.com> wrote:

  It depends alot on the bitrate of the files. What tuners are
  you using? What territory are you in?


The US, using ATSC tuners (2 on PCI bus) - will be adding a dual
home run via internal seperate ethernet card (to keep data
traffic off the switch).

I had a post with my bonnie++ specs from both my drives.  Since I
don't run jobs during primetime when I would be hitting more than
two tuners at once (but most likely watching a stream), it looks
like I won't have an issue, which is comforting.

Still have one issue left to tackle with my machine (finally got
the powernowd working well on the front end which SIGNIFIGANTLY
reduced the temp), and that is to get the ladspa compressor
working so volume isn't all over the place like it has been on
some networks.  That might be another post on an ubuntu board,
though :)


Again, the results of my drive:

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=20
/sec %CP
localhost.locald 4G   251  89 45282  18 22993   7   562  63
76175  10
174.6   5
Latency             90914us     521ms    1416ms   97811us
277ms=20=20=
=20=20
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=20
              /sec %CP
                 16  1670  87 +++++ +++ +++++ +++  1656  85 +++++
+++=20
                 4142  82
Latency             19728us    5890us    6664us   20510us
236us=20=20
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=20
/sec %CP
localhost.locald 4G   493  82 98341  22 33124  10   886  91
123012  18
133.8   3
Latency             54205us     748ms     648ms   22987us
37155us=20=20=
=20=20
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=20
              /sec %CP
                 16   238   2 +++++ +++   128   1   125   1 +++++
+++=20=20
                 104   1
Latency               276ms    5982us     265ms     302ms
6891us=20=20=
=20=20
374ms


---
Kris B.
[1]krisbee at krisbee.com

References

1. mailto:krisbee at krisbee.com
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