org.apache.hadoop.hbase.master.normalizer

接口 RegionNormalizer

所有已知实现类:

SimpleRegionNormalizer

@InterfaceAudience.Private
public interface RegionNormalizer

Performs "normalization" of regions on the cluster, making sure that suboptimal choice of split keys doesn't leave cluster in a situation when some regions are substantially larger than others for considerable amount of time. Users who want to use this feature could either use default SimpleRegionNormalizer or plug in their own implementation. Please note that overly aggressive normalization rules (attempting to make all regions perfectly equal in size) could potentially lead to "split/merge storms".

方法概要

方法

限定符和类型	方法和说明
List<NormalizationPlan>	computePlanForTable(TableName table) Computes next optimal normalization plan.
void	setMasterRpcServices(MasterRpcServices masterRpcServices) Set the master RPC service.
void	setMasterServices(MasterServices masterServices) Set the master service.

方法详细资料

setMasterServices

void setMasterServices(MasterServices masterServices)

Set the master service. Must be called before first call to computePlanForTable(TableName).

参数:

masterServices - master services to use

setMasterRpcServices

void setMasterRpcServices(MasterRpcServices masterRpcServices)

Set the master RPC service. Must be called before first call to computePlanForTable(TableName).

参数:

masterRpcServices - master RPC services to use

computePlanForTable

List<NormalizationPlan> computePlanForTable(TableName table)
                                            throws HBaseIOException

Computes next optimal normalization plan.

参数:

table - table to normalize

返回:

normalization actions to perform. Null if no action to take

抛出:

HBaseIOException