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https://issues.apache.org/jira/browse/ACCUMULO-1495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15478205#comment-15478205
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Christopher Tubbs commented on ACCUMULO-1495:
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Yes, it's a completely separate solution for the same basic problem of query
performance.
It's probably worth mentioning such alternatives here, because I think other
solutions should be considered first before multiple-hosting. Multiple-hosting
is so complex and error-prone, I'd hate to consider it as a primary option.
Although I think it's probably worth mentioning them here, if other ideas can
be fleshed out to the point where they are sufficiently articulable as a
proposal (or area of investigation), then yes, they deserve their own JIRA.
(I've created ACCUMULO-4452 for this one.)
> Host multiple read-only versions of tablets for query performance
> -----------------------------------------------------------------
>
> Key: ACCUMULO-1495
> URL: https://issues.apache.org/jira/browse/ACCUMULO-1495
> Project: Accumulo
> Issue Type: New Feature
> Reporter: Christopher Tubbs
>
> It might be worth providing read-only views of tablets on multiple servers,
> while writes go to a single authoritative server. This could improve query
> performance in some cases.
> Some things to consider:
> # Consistency: can I read what I've just written?
> # Configuration: how many copies?
> # Configuration: how long between syncs?
> # Performance: locality, number of file replicas
> Variation:
> Permit multiple hosting only on tables that have been locked for writes
> (useful with a strictly enforced clone-and-lock feature).
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