tsreaper commented on code in PR #443: URL: https://github.com/apache/flink-table-store/pull/443#discussion_r1053934087
########## docs/content/docs/maintenance-actions/write-performance.md: ########## @@ -0,0 +1,118 @@ +--- +title: "Write Performance" +weight: 1 +type: docs +aliases: +- /maintenance-actions/write-performance.html +--- +<!-- +Licensed to the Apache Software Foundation (ASF) under one +or more contributor license agreements. See the NOTICE file +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 +with the License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, +software distributed under the License is distributed on an +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +KIND, either express or implied. See the License for the +specific language governing permissions and limitations +under the License. +--> + +# Write Performance + +Performance of Table Store writers are related with the following factors. + +## Parallelism + +It is recommended that the parallelism of sink should be less than or equal to the number of buckets, preferably equal. You can control the parallelism of the sink with the `sink.parallelism` table property. + +<table class="table table-bordered"> + <thead> + <tr> + <th class="text-left" style="width: 20%">Option</th> + <th class="text-left" style="width: 5%">Required</th> + <th class="text-left" style="width: 5%">Default</th> + <th class="text-left" style="width: 10%">Type</th> + <th class="text-left" style="width: 60%">Description</th> + </tr> + </thead> + <tbody> + <tr> + <td><h5>sink.parallelism</h5></td> + <td>No</td> + <td style="word-wrap: break-word;">(none)</td> + <td>Integer</td> + <td>Defines the parallelism of the sink operator. By default, the parallelism is determined by the framework using the same parallelism of the upstream chained operator.</td> + </tr> + </tbody> +</table> + +## Number of Sorted Runs to Trigger Compaction + +Table Store uses LSM which supports a large number of updates. LSM organizes files in several "sorted runs". When querying records from an LSM, all sorted runs must be combined to produce a complete view of all records. Review Comment: I guess I'll need to add a separate document to introduce all these concepts. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@flink.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
