[ADMB Users] solid state drive and ADMB

[John Sibert]

Generally I love SSDs. My new laptop boots up from power on to login 
screen in about 12 seconds. I/O is usually really fast, but it is not 
nearly as fast as RAM. Below are timings to do 10 function evaluations 
with (1) writing temporary gradient data to SSD and (2) keeping the the 
same data in RAM. It is probably faster than writing to a spinning disk, 
but I no longer have a computer with one of those to test it.

(1) Writing to SSD
$ time ~/movemod/25/tpl/tagest -gbs 500000 -cbs 500000 -maxfn 10 -est
real    2m4.024s
user    1m38.994s
sys    0m23.509s

-rwxrwxr-x 1 jsibert jsibert  62000000 Sep 20 08:04 cmpdiff.tmp*
-rwxrwxr-x 1 jsibert jsibert 175440000 Sep 20 08:04 gradfil1.tmp*
-rwxrwxr-x 1 jsibert jsibert         0 Sep 20 08:03 gradfil2.tmp*
-rwxrwxr-x 1 jsibert jsibert         0 Sep 20 08:03 varssave.tmp*


(2) retaining in RAM
$ time ~/movemod/25/tpl/tagest -maxfn 10 -est
real    1m35.423s
user    1m34.906s
sys    0m0.124s

-rwxrwxr-x 1 jsibert jsibert     0 Sep 20 08:05 cmpdiff.tmp*
-rwxrwxr-x 1 jsibert jsibert     0 Sep 20 08:05 gradfil1.tmp*
-rwxrwxr-x 1 jsibert jsibert     0 Sep 20 08:05 gradfil2.tmp*
-rwxrwxr-x 1 jsibert jsibert     0 Sep 20 08:05 varssave.tmp*


John Sibert
Emeritus Researcher, SOEST
University of Hawaii at Manoa
Honolulu HI (GMT-10)
808-294-3842

Visit the ADMB project http://admb-project.org/

On 09/19/2013 03:35 PM, Mark Maunder wrote:
> I don't have an application on mind. Just buying some new modeling machines and working out what is important.
>
> Regards,
>
> Mark
> IATTC
>
> On Sep 19, 2013, at 5:36 PM, "John Sibert" <sibert at hawaii.edu> wrote:
>
>> I'm not sure whether you are asking about swap memory controlled by the operating system or to writing ADMB gradient data to the disk. The former is almost always a mistake. The latter would be interesting to test. I have an old linux laptop with a brand new SSD. If you send me your tpl and dat files, I could run some tests.
>> Cheers,
>> John
>>
>> John Sibert
>> Emeritus Researcher, SOEST
>> University of Hawaii at Manoa
>> Honolulu HI (GMT-10)
>> 808-294-3842
>>
>> Visit the ADMB project http://admb-project.org/
>>
>> On 09/19/2013 12:11 PM, Mark Maunder wrote:
>>> Has anyone tried to run a big ADMB model that swaps memory to the hard drive with a solid state drive? Does this perform reasonably or is it still really slow?
>>>
>>> *From:*users-bounces at admb-project.org [mailto:users-bounces at admb-project.org] *On Behalf Of *Mollie Brooks
>>> *Sent:* Thursday, September 19, 2013 1:43 PM
>>> *To:* users at admb-project.org Group
>>> *Subject:* [ADMB Users] dnbinom
>>>
>>> Hi ADMB users,
>>>
>>> Has anyone besides me used the dnbinom function in their code?
>>>
>>> There's a little discussion about the possibility of reparameterizing it, but we don't want to disrupt too many people.
>>>
>>> Thanks,
>>>
>>> Mollie
>>>
>>> ------------------------
>>>
>>> Mollie Brooks, PhD
>>> Postdoctoral Researcher, Population Ecology Research Group http://www.popecol.org <http://www.popecol.org>
>>> Institute of Evolutionary Biology & Environmental Studies, University of Zürich
>>>
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at admb-project.org
>>> http://lists.admb-project.org/mailman/listinfo/users
>>