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https://issues.apache.org/jira/browse/OAK-5970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16022709#comment-16022709
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Chetan Mehrotra commented on OAK-5970:
--------------------------------------
Done initial implementation with 1796042 which emits the rate of traversal like
\[3648.62 nodes/s/ 13135037.84 nodes/hr\]
{noformat}
14:00:20.463 INFO [main] /oak:index/lucene => Indexed 110000 nodes in
1.330 s ...
14:00:21.349 INFO [main] Reindexing Traversed #230000
/libs/dam/gui/components/admin/collections/createcollection/selfcollectionmember/selfcollectionmember.jsp/jcr:content
[3593.72 nodes/s/ 12937387.50 nodes/hr]
14:00:21.961 INFO [main] Reindexing Traversed #240000
/libs/dam/gui/content/assets/jcr:content/actions/selection/share/items/macshare/granite:rendercondition
[3636.33 nodes/s/ 13090800.00 nodes/hr]
14:00:21.961 INFO [main] /oak:index/lucene => Indexed 120000 nodes in
1.498 s ...
14:00:23.215 INFO [main] Reindexing Traversed #250000
/libs/wcm/core/components/timewarp/timeline/ajax/images/bubble-left.png
[3676.44 nodes/s/ 13235188.24 nodes/hr]
14:00:24.723 INFO [main] Reindexing Traversed #260000
/libs/granite/operations/content/queryperformance/query-performance-main-panel/items/explainResultSpinnerModal/footer/close
[3611.08 nodes/s/ 12999900.00 nodes/hr]
14:00:24.724 INFO [main] /oak:index/lucene => Indexed 130000 nodes in
2.763 s ...
14:00:25.747 INFO [main] Reindexing Traversed #270000
/libs/granite/distribution/content/distribution-agent/content/items [3648.62
nodes/s/ 13135037.84 nodes/hr]
{noformat}
It uses a TraversalRateEstimator which estimates the current rate. This has 2
implementations
* SimpleRateEstimator - Does a simple mean rate calculation based on time spent
and number of nodes traversed so far
* MetricRateEstimator - Uses metrics api and makes use of 5 min moving average
providing a better result. This is used if MetricsStatisticsProvider is in use
> (Re-)Indexing: estimate progress / ETA
> --------------------------------------
>
> Key: OAK-5970
> URL: https://issues.apache.org/jira/browse/OAK-5970
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Components: indexing
> Reporter: Thomas Mueller
> Assignee: Chetan Mehrotra
> Fix For: 1.8
>
>
> Reindexing can take a long time, so it would be good if we can estimate where
> we are at (for example in percent of the relevant number of nodes). It might
> also be possible to estimate when indexing will be done, and the current path.
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