Re: Dynamic Partitioning using Segment Visibility Maps

Simon Riggs wrote:
> We would keep a dynamic visibility map at *segment* level, showing which
> segments have all rows as 100% visible. No freespace map data would be
> held at this level. 

Small dumb-user question.

I take it you've considered some more flexible consecutive-run-of-blocks 
unit of flagging rather than file-segments. That obviously complicates 
the tracking but means you can cope with infrequent updates as well as 
mark most of the "most recent" segment for log-style tables.

--   Richard Huxton  Archonet Ltd