jasobrown

CASSANDRA 3.11 DTEST FAILS ::: https://circleci.com/workflow-run/c19fc633-7dd3-427b-b914-257409272274


no-vnodes:: 5 fails
1) internal - pytest

TypeError: unhashable type: 'InvalidRequestException'


2) test_describecluster_more_information_three_datacenters - nodetool_test.TestNodetool

jasobrown

#!/bin/bash

TEST_NAME=$1
echo "&&&&&& going to dtest $TEST_NAME &&&&&&&&&&"
OUT="/tmp/junit-$TEST_NAME.log"

cd $DTEST_HOME

for i in `seq 1 50`; do
	echo "******** $i -- $(date) ************"

jasobrown

# Run complete. Total time: 00:26:41

Benchmark                                                           (clusterSize)    Mode      Cnt          Score       Error  Units
GossipTask_NoStatusCheck.doAckVerbHandler                                      16  sample  5276738       3882.207 ±    36.202  ns/op
GossipTask_NoStatusCheck.doAckVerbHandler:doAckVerbHandler·p0.00               16  sample                3160.000              ns/op
GossipTask_NoStatusCheck.doAckVerbHandler:doAckVerbHandler·p0.50               16  sample                3444.000              ns/op
GossipTask_NoStatusCheck.doAckVerbHandler:doAckVerbHandler·p0.90               16  sample                4264.000              ns/op
GossipTask_NoStatusCheck.doAckVerbHandler:doAckVerbHandler·p0.95               16  sample                4904.000              ns/op
GossipTask_NoStatusCheck.doAckVerbHandler:doAckVerbHandler·p0.99               16  sample               10288.000              ns/op
GossipTask_NoStatusCheck.doAckVerbHandler:doAckVerbHand

jasobrown

➜  ~  cat .Xmodmap 
!!! xmodmap for apple mba keyboard/touchpad
!! left-to-right
!

!! clear mod keys
clear control
clear Mod1
clear Mod4
clear Mod5

jasobrown

A Gossip-Style Failure Detection Service - http://www.cs.cornell.edu/Info/People/rvr/papers/GossipFD.pdf
The Failure Dectector Abstraction - http://perso.telecom-paristech.fr/~kuznetso/pubs/fdsurvey.pdf
The phi-accrual Failure Detector - http://www.jaist.ac.jp/~defago/files/pdf/IS_RR_2004_010.pdf

jasobrown

/*
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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jasobrown

- find replacement for JEP library
- license ????

- core/examples vs. core/scamp | core/lpbcast .... not sure how these are diff (does examples use the others?)
- core/examples/aggregation vs. aggregation/src classes? seems like a lot of duplicated code

jasobrown

Topics and questions for discussion with João and Jordan

topics

• peer sampling service vs. gossip service
  • how does this map to cassandra? riak?
• where does a failure detection system fall within a gossip system?

random questions

• when João is thinking about 10k node systems, what does he imagine the puspose of that cluster to be and why using gossip? a P2P network, like bit torrent?

jasobrown

public class AstyanaxSample {
    /** entry point for the cluster; read the docs at https://github.com/Netflix/astyanax/wiki/Getting-Started */
    private static final Keyspace keyspace = null; //null used for compilation; don't try this at home                                                                               
    /** declare/define the column family object */
    private static final ColumnFamily<String, MyCompositeColumn> ALLOCS_COLUMN_FAMILY =
            new ColumnFamily<String, MyCompositeColumn>("cust_allocs", StringSerializer.get(),
                    new AnnotatedCompositeSerializer<MyCompositeColumn>(MyCompositeColumn.class));

    /** annotated class to represent the composite column type for an allocation */
    private static class MyCompositeColumn {