Vlad, I am running in separate processes. But I think I found at least part of the problem. It is the HTable connection setup that is affecting it If I setup all the connections in all the processes for all the tables then and then call the endpoints it goes through ok. At least for the example below. But with my real code where one endpoint does some computation of atleast 400-500msec. It is degrading exponentially. (I will reduce the handler count and try ). Thanks and appreciate your response. These things are blocking me from doing real scalability testing. We got single client down to 1.3 sec (target is under a sec) and now I want to move on to scalability.
Regards, - kiru ________________________________ From: Vladimir Rodionov <[email protected]> To: "[email protected]" <[email protected]>; Kiru Pakkirisamy <[email protected]> Sent: Friday, August 30, 2013 12:34 PM Subject: RE: Coprocessor concurrency Can you check RS thread stack traces during your test? If there are some concurrency/contention issues they will pop up in a stack traces. Also, make sure that you run your client apps in a separate processes. Best regards, Vladimir Rodionov Principal Platform Engineer Carrier IQ, www.carrieriq.com e-mail: [email protected] ________________________________________ From: Kiru Pakkirisamy [[email protected]] Sent: Friday, August 30, 2013 1:49 AM To: hbase mailing list Subject: Coprocessor concurrency See below a null endpoint which takes 60-70msec on my 4 node ec2 cluster for a table with 45 regions. When I run 64 concurrent clients for this the latency jumps to 3000-3700 msec. (zookeeper maxClientCnxs is set to 0 (unlimited) and hbase regionserver handler count is 800). I hope I am not missing any configs for concurrency) ---------------------------------------------------------------------------------------------------------------------------------------------------------- package com.serendio.hbase.coprocessor; import java.io.IOException; import java.util.Map; import org.apache.hadoop.hbase.coprocessor.BaseEndpointCoprocessor; //Aggregation implementation at a region. public class SearchEndpoint extends BaseEndpointCoprocessor implements SearchProtocol { @Override public Map<String, Double> foo(Map<String, Double> input, int topN) throws IOException { // Implement your logic here // Map<String, Double> ret = new HashMap<String, Double>(); // ret.put("foo", 1.0); return null; } } =================================================================== package com.serendio.hbase.coprocessor; import java.io.IOException; import java.util.Map; import org.apache.hadoop.hbase.ipc.CoprocessorProtocol; public interface SearchProtocol extends CoprocessorProtocol { public Map<String, Double> foo(Map<String, Double> input, int topN) throws IOException; } ========================================================================== package com.serendio.hbase.coprocessor; import java.io.IOException; import java.util.HashMap; import java.util.Map; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.client.HTable; import org.apache.hadoop.hbase.client.HTableInterface; import org.apache.hadoop.hbase.client.coprocessor.Batch.Call; public class Search { public static final String TEST_TABLE = "c4"; public static final String TEST_FAMILY = "info"; public static final String TEST_QUALIFIER = "c1"; /** * `` * * @param args */ public static void main(String[] args) { org.apache.hadoop.conf.Configuration conf = HBaseConfiguration.create(); HTableInterface table = null; try { table = new HTable(conf, TEST_TABLE); } catch (IOException e2) { // TODO Auto-generated catch block e2.printStackTrace(); } Map<byte[], Map<String, Double>> results = null; final Map<String, Double> input = new HashMap<String, Double>(); input.put("test", 1.0); final int topN = 10; long start = System.currentTimeMillis(); try { results = table.coprocessorExec(SearchProtocol.class, null, null, new Call<SearchProtocol, Map<String, Double>>() { @Override public Map<String, Double> call(SearchProtocol instance) throws IOException { // TODO Auto-generated method stub return instance.foo(input, topN); } }); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (Throwable e1) { // TODO Auto-generated catch block e1.printStackTrace(); } long end = System.currentTimeMillis(); System.out.println("Total search elapsed time: " + Long.toString(end - start)); } } Regards, - kiru Confidentiality Notice: The information contained in this message, including any attachments hereto, may be confidential and is intended to be read only by the individual or entity to whom this message is addressed. If the reader of this message is not the intended recipient or an agent or designee of the intended recipient, please note that any review, use, disclosure or distribution of this message or its attachments, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and/or [email protected] and delete or destroy any copy of this message and its attachments.
