SHIMODA Piro Hiroshi
null+****@clear*****
Sat Oct 4 01:55:48 JST 2014
SHIMODA "Piro" Hiroshi 2014-10-04 01:55:48 +0900 (Sat, 04 Oct 2014) New Revision: 4a4e065a185846c5e8d9296d7da59cd9ad4400b2 https://github.com/droonga/droonga.org/commit/4a4e065a185846c5e8d9296d7da59cd9ad4400b2 Message: Simulate load balancing by --default-hosts option Modified files: tutorial/1.0.7/benchmark/index.md Modified: tutorial/1.0.7/benchmark/index.md (+24 -54) =================================================================== --- tutorial/1.0.7/benchmark/index.md 2014-10-04 01:09:37 +0900 (26ea389) +++ tutorial/1.0.7/benchmark/index.md 2014-10-04 01:55:48 +0900 (34bc080) @@ -365,7 +365,7 @@ To construct more effective select requests, you can give extra parameters to th % curl "http://192.168.100.50:10041/d/select?table=Pages&limit=$n_unique_requests&output_columns=title" | \ drnbench-extract-searchterms | \ drnbench-generate-select-patterns \ - --base-params="table=Pages&limit=10&match_columns=title&output_columns=title,text" \ + --base-params="table=Pages&limit=10&match_columns=title,text&output_columns=snippet_html(title),snippet_html(text),categories,_key" \ > ./patterns.json ~~~ @@ -378,10 +378,10 @@ Then the generated file becomes: "method": "get", "patterns": [ { - "path": "/d/select?table=Pages&limit=10&match_columns=title&output_columns=title,text&query=AAA" + "path": "/d/select?table=Pages&limit=10&match_columns=title,text&output_columns=snippet_html(title),snippet_html(text),categories,_key&query=AAA" }, { - "path": "/d/select?table=Pages&limit=10&match_columns=title&output_columns=title,text&query=BBB" + "path": "/d/select?table=Pages&limit=10&match_columns=title,text&output_columns=snippet_html(title),snippet_html(text),categories,_key&query=BBB" }, ... ] @@ -390,43 +390,6 @@ Then the generated file becomes: ~~~ -### Generate request pattern files for multiple endpoints - -One more note, you should prepare multiple request pattern files to distribute requests to multiple endpoints. - -If you send all requests to a single endpoint, `droonga-http-server` will become a bottleneck, because it works as a single process for now. -Moreover, `droonga-http-server` and `droonga-engine` will scramble for CPU resources. -To measure the performance of your Droonga cluster effectively, you should average out CPU load per capita. -(Of course, on production environments, it should be done by a load balancer.) - -You can specify endpoints as a comma-separated list of hosts, for the `--hosts` option of the `drnbench-generate-select-patterns` command, like: - -~~~ -% n_unique_requests=200 -% select_request="http://192.168.100.50:10041/d/select?table=Pages&limit=$n_unique_requests&output_columns=title" -% base_params="table=Pages&limit=10&match_columns=title,text&output_columns=snippet_html(title),snippet_html(text),categories,_key" -% curl "$select_request" | \ - drnbench-extract-searchterms | \ - drnbench-generate-select-patterns \ - --base-params="$base_params" \ - > ./patterns-1node.json -% curl "$select_request" | \ - drnbench-extract-searchterms | \ - drnbench-generate-select-patterns \ - --base-params="$base_params" \ - --hosts=192.168.100.50,192.168.100.51 \ - > ./patterns-2nodes.json -% curl "$select_request" | \ - drnbench-extract-searchterms | \ - drnbench-generate-select-patterns \ - --base-params="$base_params" \ - --hosts=192.168.100.50,192.168.100.51,192.168.100.52 \ - > ./patterns-3nodes.json -~~~ - -To compare overheads per nodes, here I generated three pattern files: single endpoint, two endpoints, and three endpoints. - - ## Run the benchmark OK, it's ready to run. @@ -452,8 +415,8 @@ You can run benchmark with the command `drnbench-request-response`, like: --end-n-clients=20 \ --duration=30 \ --interval=10 \ - --request-patterns-file=$PWD/patterns-1node.json \ - --default-host=192.168.100.50 \ + --request-patterns-file=$PWD/patterns.json \ + --default-hosts=192.168.100.50 \ --default-port=10041 \ --output-path=$PWD/groonga-result.csv ~~~ @@ -472,8 +435,8 @@ Important parameters are: This should be long enough to finish previous benchmark. `10` (seconds) seems good for my case. * `--request-patterns-file` is the path to the pattern file. - * `--default-host` is the host name of the target endpoint. - If the given request pattern has its own `host`, this will be ignored. + * `--default-hosts` is the list of host names of target endpoints. + By specifying multiple hosts as a comma-separated list, you can simulate load balancing. * `--default-port` is the port number of the target endpoint. * `--output-path` is the path to the result file. Statistics of all benchmarks is saved as a file at the location. @@ -513,8 +476,8 @@ Run the benchmark. --end-n-clients=20 \ --duration=30 \ --interval=10 \ - --request-patterns-file=$PWD/patterns-1node.json \ - --default-host=192.168.100.50 \ + --request-patterns-file=$PWD/patterns.json \ + --default-hosts=192.168.100.50 \ --default-port=10042 \ --output-path=$PWD/droonga-result-1node.csv ~~~ @@ -544,15 +507,22 @@ Run the benchmark. --end-n-clients=20 \ --duration=30 \ --interval=10 \ - --request-patterns-file=$PWD/patterns-2nodes.json \ - --default-host=192.168.100.50 \ + --request-patterns-file=$PWD/patterns.json \ + --default-hosts=192.168.100.50,192.168.100.51 \ --default-port=10042 \ --output-path=$PWD/droonga-result-2nodes.csv ~~~ -Note that the path to the patterns file is changed. -To simulate a load balancer, you should distribute requests for both endpoints. -Moreover, the path to the result file also changed. +Note that two hosts are specified via the `--default-hosts` option. + +If you send all requests to single endpoint, `droonga-http-server` will become a bottleneck, because it works as a single process for now. +Moreover, `droonga-http-server` and `droonga-engine` will scramble for CPU resources. +To measure the performance of your Droonga cluster effectively, you should average out CPU load per capita. + +Of course, on the production environment, it should be done by a load balancer, but It's a hassle to set up a load balancer for just benchmarking. +Instead, you can specify multiple endpoint host names as a comma-separated list for the `--default-hosts` option. + +And, the path to the result file also changed. #### Benchmark Droonga with three nodes @@ -576,13 +546,13 @@ Run the benchmark. --end-n-clients=20 \ --duration=30 \ --interval=10 \ - --request-patterns-file=$PWD/patterns-3nodes.json \ - --default-host=192.168.100.50 \ + --request-patterns-file=$PWD/patterns.json \ + --default-hosts=192.168.100.50,192.168.100.51,192.168.100.52 \ --default-port=10042 \ --output-path=$PWD/droonga-result-3nodes.csv ~~~ -Note that both paths to the patterns file and the result file are changed. +Note that both `--default-hosts` and `--output-path` are changed again. ## Analyze the result -------------- next part -------------- HTML����������������������������...Download
