[Pharo-project] Fuel serialization - feature/bug

Mariano Martinez Peck marianopeck at gmail.com
Tue Jun 14 03:44:12 EDT 2011


On Tue, Jun 14, 2011 at 9:37 AM, Mariano Martinez Peck <
marianopeck at gmail.com> wrote:

>
>
> On Tue, Jun 14, 2011 at 8:12 AM, Yanni Chiu <yanni at rogers.com> wrote:
>
>> On 13/06/11 6:56 PM, Yanni Chiu wrote:
>>
>>> On 13/06/11 5:49 PM, Mariano Martinez Peck wrote:
>>>
>>>>
>>>> mmmmmm so you are using a stream to serialize and such stream is also
>>>> being refenced from the object to serialize?
>>>>
>>>
>>> Yes, that's it - except that the stream is an FSWriteStream on a
>>> FSMemoryStore "file", which I think is an issue here. The PRKernel is
>>> holding an instance of PRFuelPersistency, which holds an FSReference.
>>> That FSReference happens to refer to a memory-based "file".
>>>
>>
>> The code is at http://ss3.gemstone.com/ss/pierfuel.html
>>
>> You'll first need a Pier image, with the following loaded:
>>
>> (ConfigurationOfFilesystem project version:  '2.0.1-baseline') load
>>
>> (ConfigurationOfFuel project version:  '1.4') load
>>  OR
>> (ConfigurationOfFuel project version:  '1.5-baseline') load
>>
>> If you run PRFuelPersistencyTest, then you'll see the stack trace. I saw
>> the same problem with 1.4 and with 1.5-baseline.
>>
>> In the 1.5-baseline, I added #fuelIgnoredInstanceVariableNames to
>> PRFuelPersistency and FSMemoryStore
>
>

BTW  you put them as class side methods, don't you?



> (to ignore 'directory' and 'root', respectively) but the same problem
>> remained. So I think it's a bug.
>>
>>
> Yes, We think you have spot a bug :)
> Martin is working on that. We will let you know. Thanks
>
>
>> Despite the test failing, the PRFuelPersistency works as expected to
>> save/restore a Pier kernel to/from a file. The file is 30 times smaller than
>> the corresponding (uncompressed) SIXX file.
>>
>>
>>
> and speed?  could you measure serialization / materialization time ?
>
> Thanks a lot,
>
>
> --
> Mariano
> http://marianopeck.wordpress.com
>
>


-- 
Mariano
http://marianopeck.wordpress.com
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