Workload E tests on a new testbed instance with careful attention to
configuration do not produce the same results. We have instead:
*Workload E* - 0.98.4RC0
[OVERALL] RunTime(ms)1270229 [OVERALL]Throughput(ops/sec)
7944[INSERT] Operations
499175 [INSERT]AverageLatency(us)
18[INSERT]MinLatency(us)
5[INSERT] MaxLatency(us)
571160 [INSERT]95thPercentileLatency(ms)
0[INSERT] 99thPercentileLatency(ms)
0 [SCAN]Operations
9500825[SCAN]AverageLatency(us)
21089[SCAN] MinLatency(us)
772 [SCAN]MaxLatency(us)
3300020[SCAN]95thPercentileLatency(ms)
107[SCAN] 99thPercentileLatency(ms)
152
I ran workload E a few times to insure the results were consistent. They
vary a bit due to natural variance but not by 23%.
On Thu, Jul 17, 2014 at 5:08 PM, Andrew Purtell <apurt...@apache.org> wrote:
> Comparing the relative performance of 0.98.4 RC0 and 0.98.0 on Hadoop
> 2.2.0 using YCSB.
>
> This will be the last report of these from me for a while, as I will be
> losing my current access to EC2 resources tomorrow.
>
> 5 concurrent YCSB clients on 5 servers target 100,000 ops/second in
> aggregate. Reported average values are averages of readings from all
> clients over 3 runs. Min values are the minimum reported by any client on
> any run. Max and percentile values are the maximum reported by any client
> on any run. What is interesting is relative differences, because each EC2
> testbed has a varying baseline. 0.98.0 and 0.98.4 tests were run on the
> same instance set.
>
> These tests were run with no security coprocessors installed, using HFile
> V2. The workload E results are a concern. *It appears we have a 23%
> decline in measured scan throughput and an 23% increase in average op time
> from 27 ms to 35 ms. *This does not correspond to any active security
> feature (though that could worsen results potentially, untested) so is
> something changed in core code. Other workloads are not affected so this is
> something specific to scanning. Perhaps delete tracking.
>
>
> *Hardware and Versions*
>
> Hadoop 2.2.0
>
> HBase 0.98.0-hadoop2 + HBASE-11277
>
> HBase 0.98.4-hadoop2 RC0
>
> YCSB 1.0.4
>
>
> 11x EC2 c3.8xlarge: 1 master, 5 slaves, 5 test clients
>
> 32 cores
>
> 60 GB RAM
>
> 2 x 320 GB directly attached SSD
>
> NameNode: 4 GB heap
>
> DataNode: 1 GB heap
>
> Master: 1 GB heap
>
> RegionServer: 8 GB heap, 24 GB bucket cache offheap engine
>
>
> *Methodology*
>
>
> Setup:
>
> 0. Start cluster
> 1. shell: create "seed", { NAME=>"u", COMPRESSION=>"snappy" }
> 2. YCSB: Preload 100 million rows into table "seed"
> 3. shell: flush "seed" ; compact "seed"
> 4. Wait for compaction to complete
> 5. shell: create_snapshot "seed", "seed_snap"
> 6. shell: disable "seed"
>
>
> For each test:
>
> 7. shell: clone_snapshot "seed_snap", "test"
> 8. YCSB: On each client (5 clients), run test -p
> operationcount=2000000 -threads 20 -target 20000
> 9. shell: disable "test"
> 10. shell: drop "test"
>
>
>
> *Workload A*
> *0.98.0* *0.98.4*
>
>
>
> [OVERALL] RunTime(ms) 100743 100693 [OVERALL] Throughput(ops/sec) 99263
> 99312 [UPDATE] Operations 4997918 4999620 [UPDATE] AverageLatency(us)
> 633 647 [UPDATE] MinLatency(us) 269 268 [UPDATE] MaxLatency(us) 1450432
> 713191 [UPDATE] 95thPercentileLatency(ms) 0 0 [UPDATE]
> 99thPercentileLatency(ms) 5 4 [READ] Operations 5002242 5000540 [READ]
> AverageLatency(us) 151 144 [READ] MinLatency(us) 0 0 [READ]
> MaxLatency(us) 1104157 952392 [READ] 95thPercentileLatency(ms) 0 0
> [READ] 99thPercentileLatency(ms) 0 0
>
>
>
> *Workload B*
>
>
>
>
>
>
> [OVERALL] RunTime(ms) 100465 100458 [OVERALL] Throughput(ops/sec) 99537
> 99544 [UPDATE] Operations 9499627 9499891 [UPDATE] AverageLatency(us)
> 556 589 [UPDATE] MinLatency(us) 268 264 [UPDATE] MaxLatency(us) 709604
> 695863 [UPDATE] 95thPercentileLatency(ms) 0 0 [UPDATE]
> 99thPercentileLatency(ms) 1 2 [READ] Operations 500533 500269 [READ]
> AverageLatency(us) 147 144 [READ] MinLatency(us) 0 0 [READ]
> MaxLatency(us) 571294 495148 [READ] 95thPercentileLatency(ms) 0 0 [READ]
> 99thPercentileLatency(ms) 0 0
>
>
>
> *Workload C*
>
>
>
>
>
>
> [OVERALL] RunTime(ms) 100091 100022 [OVERALL] Throughput(ops/sec) 99909
> 99978 [READ] Operations 9916831 10000000 [READ] AverageLatency(us) 524
> 526 [READ] MinLatency(us) 273 269 [READ] MaxLatency(us) 737108 741634
> [READ] 95thPercentileLatency(ms) 0 0 [READ] 99thPercentileLatency(ms) 1 2
>
>
>
> *Workload D*
>
>
>
>
>
>
> [OVERALL] RunTime(ms) 114244 103308 [OVERALL] Throughput(ops/sec) 89114
> 96809 [INSERT] Operations 9499965 9500306 [INSERT] AverageLatency(us)
> 1145 668 [INSERT] MinLatency(us) 270 271 [INSERT] MaxLatency(us) 4598999
> 3291540 [INSERT] 95thPercentileLatency(ms) 6 1 [INSERT]
> 99thPercentileLatency(ms) 13 3 [READ] Operations 500035 499694 [READ]
> AverageLatency(us) 14 15 [READ] MinLatency(us) 4 4 [READ] MaxLatency(us)
> 494730 495198 [READ] 95thPercentileLatency(ms) 0 0 [READ]
> 99thPercentileLatency(ms) 0 0
>
>
>
> *Workload E*
>
>
>
>
>
>
> [OVERALL] RunTime(ms) 1600910 2078826 [OVERALL] Throughput(ops/sec) 6308
> 4835 [INSERT] Operations 499131 500322 [INSERT] AverageLatency(us) 14 17
> [INSERT] MinLatency(us) 5 5 [INSERT] MaxLatency(us) 506079 564468
> [INSERT] 95thPercentileLatency(ms) 0 0 [INSERT] 99thPercentileLatency(ms)
> 0 0 [SCAN] Operations 9500869 9499678 [SCAN] AverageLatency(us)
>
>
> 26636 34620 [SCAN] MinLatency(us) 746 755 [SCAN] MaxLatency(us) 8067864
> 4615914 [SCAN] 95thPercentileLatency(ms) 117 136 [SCAN]
> 99thPercentileLatency(ms) 169 187
>
>
>
> *Workload F*
>
>
>
>
>
>
> [OVERALL] RunTime(ms) 100876 100820 [OVERALL] Throughput(ops/sec) 99133
> 99187 [UPDATE] Operations 10000000 10000000 [UPDATE] AverageLatency(us)
> 737 746 [UPDATE] MinLatency(us) 273 272 [UPDATE] MaxLatency(us) 759812
> 747124 [UPDATE] 95thPercentileLatency(ms) 1 1 [UPDATE]
> 99thPercentileLatency(ms) 5 6 [READ-MODIFY-WRITE] Operations 5000370
> 5000082 [READ-MODIFY-WRITE] AverageLatency(us) 742 750
> [READ-MODIFY-WRITE] MinLatency(us) 280 279 [READ-MODIFY-WRITE]
> MaxLatency(us) 756180 747197 [READ-MODIFY-WRITE]
> 95thPercentileLatency(ms) 1 1 [READ-MODIFY-WRITE]
> 99thPercentileLatency(ms) 5 6 [READ] Operations 5000530 5000242 [READ]
> AverageLatency(us) 22 17 [READ] MinLatency(us) 0 0 [READ] MaxLatency(us)
> 1551953 1097394 [READ] 95thPercentileLatency(ms) 0 0 [READ]
> 99thPercentileLatency(ms) 0 0
>
>
>
> --
> Best regards,
>
> - Andy
>
> Problems worthy of attack prove their worth by hitting back. - Piet Hein
> (via Tom White)
>
--
Best regards,
- Andy
Problems worthy of attack prove their worth by hitting back. - Piet Hein
(via Tom White)
