Re: [Jdbm-developer] 2PL + MVCC design

[Alex B. <boi...@in...>]

Sorry, I don't have a better answer to this at the moment.

Could you clarify what you mean by "is not going to be very efficient"?

I'm still toying with combining MVCC with the log-structured object
store idea.  Transactions being organized as a multi-ended linked-list
corresponding to ordering and later transactions shadowing prior
transactions.

alex

Thompson, Bryan B. wrote:

>Alex,
>
>One problem with some MVCC designs is that the require writing
>timestamps for readers.  I expect that this is not going to be
>very efficient.  I have seen one pure MVCC design which avoids
>this by how it generates timestamps.  It also seems possible 
>that a 2PL + MVCC design could avoid this by using the 2PL to
>induce the synchronization order and corresponding timestamps.
>
>Do you have any insight into this matter?
>
>-bryan
>  
>