[oi-dev] Some numbers for NFS builds

[Garrett D'Amore]

These numbers are consistent with my experience using spinning disks and comparing to SSDs.   Basically, the build is mostly CPU bound.

You could probably close most ofthe difference by using a ZFS filesystem for the build that had the ZIL synchronicity turned off.  (Its latency sensitive operations that are doing the most to add to compilation time, I expect.)

  -- Garrett D'Amore

On Jun 5, 2011, at 5:55 PM, "Bayard Bell" <buffer.g.overflow at googlemail.com> wrote:

> Long and short seems to be that the difference isn't so bad, it's just proportionately more when doing an incremental build in the case where there aren't any changes.
> 
> full build (-FnCDlmprt):
> 
> ZFS
> 
> real       56:48.91
> user     6:00:35.76
> sys        58:53.77
> 
> real       56:44.43
> user     5:58:27.00
> sys      1:36:39.84
> 
> NFS
> 
> real     1:07:19.96
> user     6:04:27.15
> sys      1:19:09.63
> 
> real     1:11:43.07
> user     6:11:43.47
> sys      1:21:22.65
> 
> incremental (-iFnCDlmprt):
> 
> ZFS
> 
> real       28:45.12
> user     1:38:04.47
> sys        17:05.66
> 
> real       29:09.10
> user     1:32:59.43
> sys        59:13.10
> 
> NFS
> 
> real       39:33.68
> user     1:37:55.99
> sys        23:06.83
> 
> real       39:57.23
> user     1:33:09.83
> sys        22:46.34
> 
> 
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