dhlaluku commented on a change in pull request #2848: Vmware offline migration
URL: https://github.com/apache/cloudstack/pull/2848#discussion_r235526906
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File path:
engine/api/src/main/java/org/apache/cloudstack/engine/subsystem/api/storage/DataMotionStrategy.java
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@@ -25,11 +25,28 @@
import com.cloud.agent.api.to.VirtualMachineTO;
import com.cloud.host.Host;
+/**
+ * interface to query how to move data around and to commision the moving
+ */
public interface DataMotionStrategy {
+ /**
+ * reports whether this instance can do a move from source to destination
+ * @param srcData object to move
+ * @param destData location to move it to
+ * @return the expertise level with which this instance knows how to
handle the move
+ */
StrategyPriority canHandle(DataObject srcData, DataObject destData);
StrategyPriority canHandle(Map<VolumeInfo, DataStore> volumeMap, Host
srcHost, Host destHost);
+ /**
+ * copy the source volume to its destination (on a host if not null)
Review comment:
@rafaelweingartner StorageMotionStrategy that supports host to be null is
selected and used for migrations, e.g. VmwareStorageStrategyMotion used by this
PR/feature.
A non-blank host is only used for copying objects between primary storage
pools.
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