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https://issues.apache.org/jira/browse/OAK-5499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15837817#comment-15837817
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Alex Parvulescu commented on OAK-5499:
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bq. Collecting oak:index nodes as part of first reindex traversal would help in
avoiding further traversal.
It wouldn't though, the traversal would happen anyways because that's how the
diff currently works. I added a comment on OAK-5511, but I don't see it as
helping much here.
> IndexUpdate can do mulitple traversal of a content tree during initial index
> when there are sub-root indices
> ------------------------------------------------------------------------------------------------------------
>
> Key: OAK-5499
> URL: https://issues.apache.org/jira/browse/OAK-5499
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Reporter: Vikas Saurabh
> Assignee: Vikas Saurabh
> Priority: Minor
> Fix For: 1.8
>
> Attachments: OAK-5499.patch, OAK-5499-v2-demo.patch,
> OAK-5499-v2-fix.patch
>
>
> In case we've index defs such as:
> {noformat}
> /oak:index/foo1Index
> /content
> /oak:index/foo2Index
> {noformat}
> then initial indexing process \[0] would traverse tree under {{/content}}
> twice - once while indexing for top-level indices and next when it starts to
> index newly discovered {{foo2Index}} while traversing {{/content/oak:index}}.
> What we can do is that while first diff processes {{/content}} and discovers
> a node named {{oak:index}}, it can actively go in that tree and peek into
> index defs from under it and register as required. The diff can then proceed
> under {{/content}} while the new indices would also get diffs (avoiding
> another traversal)
> \[0] first time indexing or in case {{/:async}} gets deleted or checkpoint
> for async index couldn't be retrieved
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