[Yt-dev] Parameter file store

Matthew Turk matthewturk at gmail.com
Tue Mar 3 14:15:46 PST 2009


Okay, how about this.

We make a 'freshness' column in the CSV.  This is a timestamp of the
last time the parameter file was used.  This can be the sort field,
too.  We'll set a variable -- default it to, say, 300 -- that includes
the freshness cutoff in number of parameter files.  Thus, sorted by
freshness, we take the last N, where N is set in the parameter file.

Sound good?

On Tue, Mar 3, 2009 at 1:47 PM, david collins <antpuncher at gmail.com> wrote:
>> Wow, you've been analyzing 10,000 parameter files?  Okay.
>
> Ci.  Making time sequences.  Hundreds/thousands of snapshots from a
> dozen sims, and comparing.   (This is why uber)
>
> Deleting parameter_files.csv is a good workaround for me now, so don't
> spend more than 45 seconds on it.  I did this recently, so it's not
> huge, only 68 Mb.
>
> kraken /nics/b/home/collins/.yt/parameter_files.csv
>
> d.
>
>>
>> One thing I can do is implement a maximum number in the store.  Then
>> we can only guarantee objects will be automatically retrieved (without
>> having *recently* instantiated the PF) if they were in the last N,
>> where N is the number of files we keep in the store.
>>
>> Can you send me one of your parameter file stores?  Or put it on kraken?
>>
>> -Matt
>> - Show quoted text -
>> On Tue, Mar 3, 2009 at 1:04 PM, david collins <antpuncher at gmail.com> wrote:
>>> Hey--
>>>
>>> Not sure if this belongs on the dev list--
>>>
>>> I've been reading and analyzing large-ish ( O(10,000) ) parameter
>>> files, and the parameter_file.csv gets large (300 Mb), which isn't a
>>> problem, but when that happens, doing anything (even importing YT)
>>> takes forever (> 1 minute to import yt.lagos).
>>>
>>> I did install the "unboudned growth" fix you sent, still happens.
>>>
>>> I just noticed that it  happens after your fix yesterday, or I'da said
>>> something earlier.
>>>
>>> d.
>>>
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