Research Article
Virtual Machine Placement Algorithm for Both Energy-Awareness and SLA Violation Reduction in Cloud Data Centers
Algorithm 1
Optimized allocation of VMs.
Require: hostlist // hostlist is the set of all hosts | Ensure: migrationMap | (1) for each host in hostlist do | (2) if isHostHeavilyLoaded(host) then | (3) HeavilyLoadedHosts.add(host); // host is heavily-loaded | (4) end if | (5) end for | (6) vmsToMigrate = getVmsFromHeavilyLoadedHosts(HeavilyLoadedHosts); | (7) migrationMap.addAll(getNewVmPlacement(vmsToMigrate)); | (8) HeavilyLoadedHosts.clear( ); | (9) vmsToMigrate.clear( ); | (10) for each host in hostlist do | (11) if isHostLittleLoaded(host) then | (12) LittleLoadedHosts.add(host); // host is little-loaded | (13) end if | (14) end for | (15) vmsToMigrate = getVmsToMigrateFromHosts(LittleLoadedHosts); | (16) migrationMap.addAll(getNewVmPlacement(vmsToMigrate)); | (17) return migrationMap |
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