Re: [Firebird-devel] Firebird Transaction ID limit solution

[Alexander P. <pes...@ma...>]

В Сб., 31/12/2011 в 18:08 +0400, Dmitry Yemanov пишет:
> 31.12.2011 17:57, Alexander Peshkov wrote:
> 
> > This will make each version of the record (not the record- but EACH
> > version of it) 4 bytes longer.
> 
> Not strictly necessary. We could use a variable-length encoding for txn 
> ids longer than 32 bits and mark such records with a new flag. It would 
> add zero storage/performance overhead for all the current applications 
> but allow longer txn ids for the slightly bigger cost. It would increase 
> the code complexity though.
> 

May be simply use 64-bit numbers with new flag? Variable-length encoding
is not very good from performance POV.