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Posted to issues@hbase.apache.org by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org> on 2017/07/04 12:18:00 UTC
[jira] [Updated] (HBASE-18002) Investigate why bucket cache filling
up in file mode in an exisitng file is slower
[ https://issues.apache.org/jira/browse/HBASE-18002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ramkrishna.s.vasudevan updated HBASE-18002:
-------------------------------------------
Attachment: HBASE-18002.patch
Simple patch that deletes the file if it exits in the given path.
> Investigate why bucket cache filling up in file mode in an exisitng file is slower
> -----------------------------------------------------------------------------------
>
> Key: HBASE-18002
> URL: https://issues.apache.org/jira/browse/HBASE-18002
> Project: HBase
> Issue Type: Sub-task
> Components: BucketCache
> Affects Versions: 2.0.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0
>
> Attachments: HBASE-18002.patch
>
>
> This issue was observed when we recently did some tests with SSD based bucket cache. Similar thing was also reported by @stack and [~danielpol] while doing some of these bucket cache related testing.
> When we try to preload a bucket cache (in file mode) with a new file the bucket cache fills up quite faster and there not much 'failedBlockAdditions'. But when the same bucket cache is filled up with a preexisitng file ( that had already some entries filled up) this time it has more 'failedBlockAdditions' and the cache does not fill up faster. Investigate why this happens.
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