diff options
Diffstat (limited to 'TAO/orbsvcs/orbsvcs/LoadBalancing.idl')
| -rw-r--r-- | TAO/orbsvcs/orbsvcs/LoadBalancing.idl | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/TAO/orbsvcs/orbsvcs/LoadBalancing.idl b/TAO/orbsvcs/orbsvcs/LoadBalancing.idl index 263c37d1521..817726535f8 100644 --- a/TAO/orbsvcs/orbsvcs/LoadBalancing.idl +++ b/TAO/orbsvcs/orbsvcs/LoadBalancing.idl @@ -4,7 +4,7 @@ // ============================================================================ // // = LIBRARY -// orbsvcs +// TAO_LoadBalancing // // = FILENAME // LoadBalancing.idl @@ -20,13 +20,19 @@ module LoadBalancing { // = TITLE - // This module provides TAO's Load Balancer interface. + // This module defines the interfaces and data types used in TAO's + // Load Balancing service. // = DESCRIPTION // TAO's Load Balancer manages distribution of requests to // replicas of a given Object in an effort to ensure that the // applications/hosts pointed to by the Object reference are as // equally loaded as possible, i.e. load balanced. + // The definition of 'load' is application specific, for + // example, some applications may choose to load balance access + // to multiple dedicated lines, or separate network interfaces, + // as well as more traditional load balancing metrics, such as + // CPU or disk load. interface ReplicaControl { @@ -96,10 +102,11 @@ module LoadBalancing }; oneway void current_load (in float load); - // Send current load to the Load Balancer where the definition - // of "load" is load balancing algorithm specific. + // Send current load to the Load Balancer. + // The application must ensure that all replicas use the same + // notion of load. - void disconnect (); + void disconnect () raises (NotConnected); // Disconnect the ReplicaControl from the Load Balancer. The // Object that the ReplicaControl controls will be no longer be // load balanced. @@ -137,6 +144,17 @@ module LoadBalancing // object will cause the client to redirect its requests to a // Replica that fits a specific load balancing criteria. }; + + // @@ Ossama: we may want to add interfaces or operations to access + // the current list of loads, that would be useful for monitoring + // applications, and nice GUI-based demos. + // @@ Ossama: another idea: we have been using this stuff to make + // all the loads equal, but what if the objective is to keep the + // load below some value? Maybe we should provide some callback + // mechanism to let the application know: the load is too high and + // there is nothing i can do about it, add more CPUS or reduce the + // load! + // Such feedback would be very useful for some applications. }; #endif /* TAO_LOADBALANCER_IDL */ |