public class ChaoticLoadBalancer extends TabletBalancer
Will balance randomly, maintaining distribution
TabletBalancer.BalancerProblem, TabletBalancer.NoTservers, TabletBalancer.OutstandingMigrations
Modifier and Type | Field and Description |
---|---|
protected TabletBalancer.OutstandingMigrations |
outstandingMigrations |
configuration, context, TIME_BETWEEN_BALANCER_WARNINGS
Constructor and Description |
---|
ChaoticLoadBalancer() |
ChaoticLoadBalancer(String tableName) |
Modifier and Type | Method and Description |
---|---|
long |
balance(SortedMap<TServerInstance,TabletServerStatus> current,
Set<KeyExtent> migrations,
List<TabletMigration> migrationsOut)
Ask the balancer if any migrations are necessary.
|
void |
getAssignments(SortedMap<TServerInstance,TabletServerStatus> current,
Map<KeyExtent,TServerInstance> unassigned,
Map<KeyExtent,TServerInstance> assignments)
Assign tablets to tablet servers.
|
void |
init(ServerConfiguration conf)
Deprecated.
|
checkMigrationSanity, constraintNotMet, getOnlineTabletsForTable, init, resetBalancerErrors
protected final TabletBalancer.OutstandingMigrations outstandingMigrations
public ChaoticLoadBalancer()
public ChaoticLoadBalancer(String tableName)
public void getAssignments(SortedMap<TServerInstance,TabletServerStatus> current, Map<KeyExtent,TServerInstance> unassigned, Map<KeyExtent,TServerInstance> assignments)
TabletBalancer
getAssignments
in class TabletBalancer
current
- The current table-summary state of all the online tablet servers. Read-only. The
TabletServerStatus for each server may be null if the tablet server has not yet
responded to a recent request for status.unassigned
- A map from unassigned tablet to the last known tablet server. Read-only.assignments
- A map from tablet to assigned server. Write-only.public long balance(SortedMap<TServerInstance,TabletServerStatus> current, Set<KeyExtent> migrations, List<TabletMigration> migrationsOut)
TabletBalancer
balance
in class TabletBalancer
current
- The current table-summary state of all the online tablet servers. Read-only.migrations
- the current set of migrations. Read-only.migrationsOut
- new migrations to perform; should not contain tablets in the current set of
migrations. Write-only.@Deprecated public void init(ServerConfiguration conf)
init
in class TabletBalancer
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