Re: [jira] Created: (DERBY-1068) change of store contract: online compress operations should not share any locks with user transactions

[Andreas Korneliussen <An...@Sun.COM>]

Mike Matrigali wrote:
> Andreas, are you going to propose a patch for this or would you like
> me to take the first take on it?
> 
Hi,

I would appreciate it if you would like to take the first take on it, 
since I do currently not have any code on this issue.

Thanks

--Andreas

> Andreas Korneliussen (JIRA) wrote:
> 
>> change of store contract: online compress operations should not share 
>> any locks with user transactions
>> ------------------------------------------------------------------------------------------------------ 
>>
>>
>>          Key: DERBY-1068
>>          URL: http://issues.apache.org/jira/browse/DERBY-1068
>>      Project: Derby
>>         Type: Improvement
>>   Components: Store      Reporter: Andreas Korneliussen
>>     Priority: Minor
>>
>>
>> Propose to add the following to the store contract:
>> * truncate and compress requires exclusive table locking
>> * the truncate, purge and compress operations do not share any locks 
>> with user transactions
>> Currently the store implementation allows users to share locks in 
>> truncate and possibly purge.
>>
>> This request is driven by:
>> http://www.nabble.com/conflict-detection-strategies-t1120376.html#a2938142 
>>
>>
>> and:
>>
>> http://www.nabble.com/RowLocation-contract-from-storage-engine-t1142235.html#a2994156 
>>
>>
>