vtlim commented on code in PR #15340: URL: https://github.com/apache/druid/pull/15340#discussion_r1445383669
########## docs/development/extensions-contrib/spectator-histogram.md: ########## @@ -0,0 +1,453 @@ +--- +id: spectator-histogram +title: "Spectator Histogram module" +--- + +<!-- + ~ 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. + --> + +## Summary +This module provides Apache Druid approximate histogram aggregators and percentile +post-aggregators based on Spectator fixed-bucket histograms. + +Consider using this extension if you need percentile approximations and: +* want fast and accurate queries +* at a lower storage cost +* and have a large dataset +* using only positive measurements + +> The main benefit of this extension over data-sketches is the reduced storage +footprint. Which leads to smaller segment sizes, faster loading from deep storage +and lower memory usage. + Review Comment: ```suggestion ``` Combine this into the section above. Note that the `>` notation actually makes text smaller and italicized, which may get overlooked. Example: https://druid.apache.org/docs/latest/operations/durable-storage/ ("Note that only S3 is supported as a durable storage location.") -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
