Post install FWIW

[William A. Mahaffey III]

On 10/21/15 05:58, kpneal at pobox.com wrote:
> On Tue, Oct 20, 2015 at 05:11:12PM -0453, William A. Mahaffey III wrote:
>> On 10/20/15 13:26, Quartz wrote:
>>>> When I dd'ed /dev/zero to (re-) initialize the individual
>>>> drives during install, I saw 125-ish MB/s per drive, so this is 90-ish %
>>>> efficient for this write.
>>> Do remember that using dd to estimate disk speeds is tricky since its
>>> write pattern is somewhat non-standard. You should try a more 'real
>>> world' test like rsyncing a bunch of random crap with differing sizes.
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>>
>> *Agreed*, that's why I called it 'light benchmarking'. I will be alert
>> to more data as time goes on, but this looked so promising I decided to
>> spread the love, so to speak ....
> Does this system have the optimization turned on where writes of all
> zeros get detected and turned into just a single block on disk?
>
> Maybe I'm thinking of a dedup option in which case you can ignore me.


Very good question, I wouldn't know, I made very few changes from the 
wiki page during the install. How would I check on that ? TIA & have a 
good one.


-- 

	William A. Mahaffey III

  ----------------------------------------------------------------------

	"The M1 Garand is without doubt the finest implement of war
	 ever devised by man."
                            -- Gen. George S. Patton Jr.