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https://issues.apache.org/jira/browse/HIVE-23085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17102975#comment-17102975
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Gopal Vijayaraghavan edited comment on HIVE-23085 at 5/8/20, 10:15 PM:
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This isn't about configuration - it is about failure rates with multiple mount
points and mmap(). Every extra mount point used, multiplies the failure
probability.
was (Author: gopalv):
This isn't about configuration - it is about failure rates with multiple mount
points and mmap(). Every extra mount point used, doubles the failure
probability.
> LLAP: Support Multiple NVMe-SSD disk Locations While Using SSD Cache
> --------------------------------------------------------------------
>
> Key: HIVE-23085
> URL: https://issues.apache.org/jira/browse/HIVE-23085
> Project: Hive
> Issue Type: Improvement
> Reporter: Syed Shameerur Rahman
> Assignee: Syed Shameerur Rahman
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-23085.01.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently we can configure only one SSD location while using SSD cache in
> LLAP. This highly undermines the capacity of some machines to use its disk
> capacity to the fullest. For example *AWS* provides *r5d.4x large* series
> which comes with *2 * 300 GB NVme SSD disk* with the current design only one
> of the mounted *NVme SSD* disk can be used for caching. Hence adding support
> for caching data at multiple ssd mounted locations.
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