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Region 预分区

功能简介
本例使用多点分割将HBase表按照“-∞~A”、“A~C”、“C~G”、
“G~I”、“I~+∞”分为五个Region。
以下代码片段在cn.chinatelecom.hbase.sample包的“MOBSample”类的
createTableBySplitKeys方法中。
public void createTableBySplitKeys() {
    log.info("Entering createTableBySplitKeys.");
    try (Admin admin = conn.getAdmin()) {

        ColumnFamilyDescriptor columnFamily = ColumnFamilyDescriptorBuilder
                .newBuilder(CF.getBytes())
                .build();

        TableDescriptor tableDescriptor = TableDescriptorBuilder
                .newBuilder(tableName)
                .setColumnFamily(columnFamily)
                .build();

        byte[][] splitKeys = new byte[4][];
        splitKeys[0] = "A".getBytes();
        splitKeys[1] = "C".getBytes();
        splitKeys[2] = "G".getBytes();
        splitKeys[3] = "I".getBytes();

        admin.createTable(tableDescriptor, splitKeys);
        log.info("createTableBySplitKeys successfully.");
    } catch (Exception e) {
        log.error("MultiSplit failed.",e);
    }
    log.info("Exiting createTableBySplitKeys.");
}
注意：预分区操作只能在建表时起作用。