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https://issues.apache.org/jira/browse/OAK-5970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16022710#comment-16022710
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Chetan Mehrotra commented on OAK-5970:
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As a next step thinking to introduce a SubTreeSizeEstimator which would provide
a subtree size for given path. This estimator can have following implementations
* ApproximateCounter based - Uses approx counter support to do the estimation
* Mongo query based - Makes used of count approach used in oak-mongo.js which
is based on prefix query (similar can be done for RDB)
This estimate would then be used to predict time left, ETA, duration etc
[~tmueller] [~catholicon] Thoughts?
> (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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