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https://issues.apache.org/jira/browse/KUDU-3214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17232515#comment-17232515
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wangningito commented on KUDU-3214:
-----------------------------------
As I mentioned in
[gerrit|https://gerrit.cloudera.org/#/c/16274/2//COMMIT_MSG@9], wals seems
harder than blocks when implementing.
Write this issue to let you know I'm doing it.
> Parallelize DownloadWAL in tablet copy operations
> -------------------------------------------------
>
> Key: KUDU-3214
> URL: https://issues.apache.org/jira/browse/KUDU-3214
> Project: Kudu
> Issue Type: New Feature
> Components: consensus, tablet
> Reporter: wangningito
> Assignee: wangningito
> Priority: Minor
>
> When downloading tablet data via tablet copy operation, it is necessary to
> download blocks data and wal data.
> In [KUDU-1728|https://issues.apache.org/jira/browse/KUDU-1728] the
> DownloadBlocks were parallelized.
> However, to intuition, it may make senses to make DownloadWALs parallelized
> as well. It requires very strict performance tests and correctness guarantee
> to determine whether to have parallelized version DownloadWALs or not.
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