Rudder

Bug #6729

Updated by François ARMAND over 9 years ago

If we do a partial promise regeneration, some node may have their new promises in the folder 
 /path/to/relay.new/path/to/node 

 rather than the good old /path/to/relay/path/to/node 

 More presillely, we have the following case to manage (node3 was removed in the generation): 

 *1/ Relay and all nodes updated (historical defautl behaviour)* 

 Generation gives: 
 <pre> 
 relay/ 
   relay_promises 
   share/{ node1, node2, node3 } 
 relay.new/ 
   relay_promises 
   share/{ node1.new, node2.new } 
 </pre> 

 We want ([U] means updated): 

 <pre> 
 relay/ 
   relay_promises [U] 
   share/{ node1 [U], node2 [U] } 
 </pre> 

 *2/ Relay promises not updated, some children updated:* 

 Generation gives: 
 <pre> 
 relay/ 
   relay_promises 
   share/{ node1, node2, node3 } 
 relay.new/ 
   share/{ node1.new } 
 </pre> 

 We want:  

 <pre> 
 relay/ 
   relay_promises  
   share/{ node1 [U], node2 } 
 </pre> 


 *3/ Relay promises updated, some children updated:* 

 Generation gives: 
 <pre> 
 relay/ 
   relay_promises 
   share/{ node1, node2, node3 } 
 relay.new/ 
   relay_promises 
   share/{ node1.new } 
 </pre> 

 We want:  

 <pre> 
 relay/ 
   relay_promises [U] 
   share/{ node1 [U], node2 } 
 </pre> 


 We see that all the naive scheme of moving or copying can't be used, and that some set union and intersection of nodes modified or not modified must be done. 

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