Adds a new Rollup Action #64900

talevy · 2020-11-10T23:40:10Z

This commit adds a new endpoint for Rollup V2, a new way to rollup indices.

Instead of relying on a cron-job, this action will rollup a whole index on the spot.

When an index is rolled up using a Rollup Config, it does the following

check that original index is read-only
runs an aggregation and indexes results into a temporary hidden rollup index
"resizes" the temporary index into the final rollup-index (in-place segment pointer juggling)
adds RollupMetadata about the rollup-group (keyed by original index name) and adds custom index-metadata with data about what the rollup index's original index is so that its group information in RollupMetadata can be looked up

example usage:

POST /index/_rollup
{
    "rollup_index": "index_rolled",
    "groups": {
        "date_histogram": {
            "field": "date",
            "calendar_interval": "1M"
        },
        "terms": {
            "fields": ["unit"]
        }
    },
    "metrics": [
        {
            "field": "temperature",
            "metrics": ["sum"]
        }
    ]
}

elasticmachine · 2020-11-10T23:40:12Z

Pinging @elastic/es-analytics-geo (:Analytics/Rollup)

talevy · 2020-11-12T00:46:39Z

run elasticsearch-ci/2
run elasticsearch-ci/bwc

talevy · 2020-11-12T00:49:51Z

For the reviewers @csoulios and @not-napoleon, I am still working on making more of the indexer logic unit-testable. I would love some feedback on the general process and any large gotchyas you may see. There is a lot of state change and index dancing. I do intend to make these parts a bit more resilient, but that may not be a part of this PR pending further discussion! thanks!

This commit adds a new endpoint for Rollup V2, a new way to rollup indices. Instead of relying on a cron-job, this action will rollup a whole index on the spot. When an index is rolled up using a Rollup Config, it does the following 1. check that original index is read-only 2. runs an aggregation and indexes results into a temporary hidden rollup index 3. "resizes" the temporary index into the final rollup-index (in-place segment pointer juggling) 4. adds RollupMetadata about the rollup-group (keyed by original index name) and adds custom index-metadata with data about what the rollup index's original index is so that its group information in RollupMetadata can be looked up example usage: ``` POST /_rollup_vtwo/index { "rollup_index": "index_rolled", "groups": { "date_histogram": { "field": "date", "calendar_interval": "1M" }, "terms": { "fields": ["unit"] } }, "metrics": [ { "field": "temperature", "metrics": ["sum"] } ] } ```

not-napoleon

I left a few thoughts, but I don't think any of them are blockers to merging.

server/src/main/java/org/elasticsearch/cluster/ClusterModule.java

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/rollup/v2/RollupV2Action.java

...k/plugin/rollup/src/main/java/org/elasticsearch/xpack/rollup/v2/TransportRollupV2Action.java

This commit adds a new endpoint for Rollup V2, a new way to rollup indices. Instead of relying on a cron-job, this action will rollup a whole index on the spot. When an index is rolled up using a Rollup Config, it does the following 1. check that original index is read-only 2. runs an aggregation and indexes results into a temporary hidden rollup index 3. "resizes" the temporary index into the final rollup-index (in-place segment pointer juggling) 4. adds RollupMetadata about the rollup-group (keyed by original index name) and adds custom index-metadata with data about what the rollup index's original index is so that its group information in RollupMetadata can be looked up example usage: ``` POST /_rollup_vtwo/index { "rollup_index": "index_rolled", "groups": { "date_histogram": { "field": "date", "calendar_interval": "1M" }, "terms": { "fields": ["unit"] } }, "metrics": [ { "field": "temperature", "metrics": ["sum"] } ] } ``` relates elastic#42720.

This commit adds a new endpoint for Rollup V2, a new way to rollup indices. Instead of relying on a cron-job, this action will rollup a whole index on the spot. When an index is rolled up using a Rollup Config, it does the following 1. check that original index is read-only 2. runs an aggregation and indexes results into a temporary hidden rollup index 3. "resizes" the temporary index into the final rollup-index (in-place segment pointer juggling) 4. adds RollupMetadata about the rollup-group (keyed by original index name) and adds custom index-metadata with data about what the rollup index's original index is so that its group information in RollupMetadata can be looked up example usage: ``` POST /_rollup_vtwo/index { "rollup_index": "index_rolled", "groups": { "date_histogram": { "field": "date", "calendar_interval": "1M" }, "terms": { "fields": ["unit"] } }, "metrics": [ { "field": "temperature", "metrics": ["sum"] } ] } ``` relates #42720.

This PR implements downsampling operation on time series indices. The PR creates a _rollup endpoint that allows users to downsample an index and can be accessed by the following call: POST /<source_index>/_rollup/<rollup_index> { "fixed_interval": "1d" } Requirements An index can be downsampled if all of the following requirements are met: Must be a time series index (have the index.mode: time_series index setting) Must not be writeable (have the index.blocks.write: true index setting) Must have dimension fields marked with mapping parameter time_series_dimension: true Must have metric fields marked with mapping parameter time_series_metric Relates to #74660 Fixes #65769 Fixes #69799 Finally, this PR is based on the code written for #64900

This PR implements downsampling operation on time series indices. The PR creates a _rollup endpoint that allows users to downsample an index and can be accessed by the following call: POST /<source_index>/_rollup/<rollup_index> { "fixed_interval": "1d" } Requirements An index can be downsampled if all of the following requirements are met: Must be a time series index (have the index.mode: time_series index setting) Must not be writeable (have the index.blocks.write: true index setting) Must have dimension fields marked with mapping parameter time_series_dimension: true Must have metric fields marked with mapping parameter time_series_metric Relates to elastic#74660 Fixes elastic#65769 Fixes elastic#69799 Finally, this PR is based on the code written for elastic#64900

talevy added >feature :StorageEngine/Rollup Turn fine-grained time-based data into coarser-grained data v8.0.0 Team:Analytics Meta label for analytical engine team (ESQL/Aggs/Geo) labels Nov 10, 2020

talevy mentioned this pull request Nov 10, 2020

Refactor rollups meta (AKA Rollup V2) #42720

Closed

21 tasks

talevy force-pushed the rollupv2action branch from 62b76a5 to be90dd3 Compare November 12, 2020 00:06

talevy requested review from csoulios and not-napoleon November 12, 2020 00:48

talevy added 2 commits November 18, 2020 16:01

fix config serialization tests

1a3e115

talevy force-pushed the rollupv2action branch from be90dd3 to 1a3e115 Compare November 19, 2020 00:01

not-napoleon approved these changes Nov 19, 2020

View reviewed changes

talevy added 2 commits November 19, 2020 11:40

Merge remote-tracking branch 'elastic/master' into rollupv2action

55a3087

fix merge issue where aggregate_metric was removed

49796c2

talevy changed the title ~~Adds a new Rollup V2 Action~~ Adds a new Rollup Action Nov 19, 2020

talevy added 6 commits November 19, 2020 15:48

rename endpoint from rollupv2 -> rollup

35d5dc1

fix checkstyle

8af508a

use valid rest path

96f4840

Merge remote-tracking branch 'elastic/master' into rollupv2action

32d5857

cleanup adding of new rollup groups

a395a03

fix checkstyle

219e356

talevy added >non-issue and removed >feature labels Nov 23, 2020

talevy merged commit 06da3d7 into elastic:master Nov 23, 2020

talevy deleted the rollupv2action branch November 23, 2020 21:04

talevy added v7.11.0 backport pending labels Nov 23, 2020

jrodewig mentioned this pull request Nov 24, 2020

[DOCS] Add rollup V2 API docs #65398

Merged

talevy removed the backport pending label Nov 24, 2020

talevy mentioned this pull request Dec 2, 2020

Rollup Action must throw exception when rollup index already exists #65769

Closed

jakelandis added v8.0.0-alpha1 and removed v8.0.0 labels Jul 26, 2021

csoulios mentioned this pull request Apr 14, 2022

TSDB: Implement downsampling on time-series indices #85708

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