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From Stephen Fitch <0519...@acadiau.ca>
Subject Re: [jira] Created: (DERBY-646) In-memory backend storage support
Date Fri, 28 Oct 2005 19:47:30 GMT
the code has been posted at 
http://issues.apache.org/jira/browse/DERBY-646 :)

Stephen Fitch



Stephen Fitch wrote:
> Hi Norbert,
> 
> I have it working in the trunk embedded client in gentoo linux under jdk 
> 1.4.2.08 but it should theoretically run under jdk 1.3.1 and any recent 
> release of derby. However, as far as I can tell the network 
> client/server doesn't support alternate implementations of 
> StorageFactory.  I'm still trying to track down if this is the case.  If 
> it is, another connection URL attribute may have to be added for 
> in-memory to work on the network side of things.
> 
> I'm having issues trying to test the performance as well since I'm 
> competing with derby's page cache, java.nio's and my hard drive write 
> cache (which I can't seem to turn off).
> 
> *VERY* preliminary numbers indicate a 10-20% performance increase on 
> inserts which is well below my expectations.  I'm going to code up some 
> tests for other operations today though.
> 
> If anyone's interested in trying the code out or going over it to look 
> for areas of improvement it would be much appreciated.
> 
> I suppose the best way to distro it would to email a svn diff patch and 
> source code for the new classes to the mailing list? I'm not looking to 
> get it added to svn though, as it still needs work.
> 
> Regards,
> 
> 
> 
> 
> Stephen Fitch
> Acadia University
> 
> 
> 
> 
> 
> 
> 
> 
> Toth-Gati Norbert wrote:
> 
>> Hi Stephen,
>>
>> So now this means the support for in-memory storage is completed.
>> I will give it a try. But glad you finally got to the end. Good job!
>>
>> Regards,
>>     Norbert
>>
>> ----- Original Message ----- From: "Stephen Fitch (JIRA)" 
>> <derby-dev@db.apache.org>
>> To: <derby-dev@db.apache.org>
>> Sent: Tuesday, October 25, 2005 8:33 PM
>> Subject: [jira] Created: (DERBY-646) In-memory backend storage support
>>
>>
>>> In-memory backend storage support
>>> ---------------------------------
>>>
>>>         Key: DERBY-646
>>>         URL: http://issues.apache.org/jira/browse/DERBY-646
>>>     Project: Derby
>>>        Type: New Feature
>>>  Components: Store
>>> Environment: All
>>>    Reporter: Stephen Fitch
>>>
>>>
>>> To allow creation and modification of databases in-memory without 
>>> requiring disk access or space to store the database.
>>>
>>> -- 
>>> This message is automatically generated by JIRA.
>>> -
>>> If you think it was sent incorrectly contact one of the administrators:
>>>   http://issues.apache.org/jira/secure/Administrators.jspa
>>> -
>>> For more information on JIRA, see:
>>>   http://www.atlassian.com/software/jira
>>>
>>
>>
> 

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