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我已经使用c#的thrift接口从Hbase获取实时数据。我的问题是,过滤查询花费太多时间来从hbase的响应。示例代码如下:如何提高Thrift客户端扫描器查询到Hbase的性能
string TableName="testtable";
Dictionary<byte[], byte[]> attributes = new Dictionary<byte[], byte[]>();
TScan scanFilter = new TScan();
scanFilter.FilterString = ToByteArray("((RowFilter(<=,'binary:1053_1371222000')) AND (RowFilter(>=,'binary:1053_1371217740'))) OR (RowFilter(<=,'binary:1055_1371222000')) AND (RowFilter(>=,'binary:1055_1371217740')))");
var scanner = _client.scannerOpenWithScan(ToByteArray(TableName), scanFilter, attributes);
for (var entry = _client.scannerGet(scanner); entry.Count > 0; entry = _client.scannerGet(scanner))
{
foreach (var rowResult in entry)
{
string rowkey = Encoding.UTF8.GetString(rowResult.Row);
Console.Write("{0} => ", rowkey);
}
}
_client.scannerClose(scanner);
我的问题是:
1)有多少,让我们提升节俭查询的性能(优化)到HBase的。 2)如何在Hbase上缓存Thrift查询响应。 3)如何管理主节点上Thrift服务器的负载均衡。