[Vrs-development] Dynamic GW domain table

[Eric Altendorf]

I suppose I could envision functionality in the cluster manager that 
receives requests from running programs for particular services, 
discovers domains providing those services by talking to other CM's, 
and swaps those domains in to slots in GW's domain table.  It would 
also have to keep track of the connectness of the entire VRS to avoid 
partitioning (one group of nodes getting completely disconnected from 
another group).

And as you point out, the distributed filesystem will complicate 
things a little bit.  Any filesystem-modifying operation (eg write()) 
must be synchronized among the various nodes that either store the 
virtual sector in question, are reading it, or are writing to it.  
That means that all those nodes will have to be swapped in to slots 
in GW's domain table before the write can complete, and that the 
write will block or fail if there aren't enough slots to swap all the 
nodes in.  (Talk about a slow filesystem. :-)

I'm skeptical, but your persistence has convinced me that it's 
possible. :-)

Eric

-- 
"First they ignore you.  Then they laugh at you.
 Then they fight you.  And then you win."             -Gandhi