public IEnumerable <Member> GetVictims(CurrentClusterState clusterState)
{
var oldest = clusterState.GetMembers(Role).SortByAge().FirstOrDefault();
var available = clusterState.GetAvailableMembers(Role);
var haveOldest = oldest != null && available.Contains(oldest);
var oldestIsAlone =
(haveOldest && available.Count == 1) ||
(!haveOldest && available.Count == clusterState.GetMembers(Role).Count - 1);
if (oldest == null)
{
return(clusterState.GetUnreachableMembers());
}
if (oldestIsAlone && DownIfAlone)
{
return new List <Member> {
oldest
}
}
;
return(haveOldest
? clusterState.GetUnreachableMembers()
: clusterState.GetMembers());
}
}
/// <summary>
/// The strategy named keep-majority will down the unreachable nodes if the
/// current node is in the majority part based on the last known membership information.
/// Otherwise down the reachable nodes, i.e. the own part. If the parts are of equal size
/// the part containing the node with the lowest address is kept.
/// </summary>
public IEnumerable <Member> GetVictims(CurrentClusterState clusterState)
{
var members = clusterState.GetMembers(Role);
var unreachableMembers = clusterState.GetUnreachableMembers(Role);
var availableMembers = clusterState.GetAvailableMembers(Role);
int unreachableCount = unreachableMembers.Count;
int availableCount = availableMembers.Count;
if (availableCount == unreachableCount)
{
var oldest = clusterState.GetMembers(Role).SortByAge().FirstOrDefault();
if (oldest != null && availableMembers.Contains(oldest))
{
return(clusterState.GetUnreachableMembers());
}
else
{
return(clusterState.GetMembers());
}
}
return(availableCount < unreachableCount
//too few available, down our partition (entire members)
? clusterState.GetMembers()
//enough available, down unreachable
: clusterState.GetUnreachableMembers());;
}
public IEnumerable <Member> GetVictims(CurrentClusterState clusterState)
{
var members = clusterState.GetMembers(Role);
var unreachable = clusterState.GetUnreachableMembers(Role);
int availableCount = members.Count - unreachable.Count;
return(availableCount < QuorumSize
//too few available, down our partition
? clusterState.GetMembers()
//enough available, down unreachable
: clusterState.GetUnreachableMembers());
}
public IEnumerable <Member> GetVictims(CurrentClusterState clusterState)
{
bool haveReferee = clusterState.HasAvailableMember(Address);
return(!haveReferee || clusterState.GetAvailableMembers().Count < DownAllIfLessThanNodes
? clusterState.GetMembers()
: clusterState.GetUnreachableMembers());
}
