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Vrushali C commented on YARN-3134: ---------------------------------- Hi [~gtCarrera9] Thanks for the patch! I took a quick look and had two questions: 1) are you also writing the entity metrics to the backend? I see the primary key, creation/modification times and configs being written but could not see entity.getMetrics() anywhere. 2) how are the config column names being written? Are all the columns joined by a separator? If I can see an example that would be great. For example, say a config value of "pig.job.submitted.timestamp" has a string value of "1340218739371", how does it show up in the column family for configs? > [Storage implementation] Exploiting the option of using Phoenix to access > HBase backend > --------------------------------------------------------------------------------------- > > Key: YARN-3134 > URL: https://issues.apache.org/jira/browse/YARN-3134 > Project: Hadoop YARN > Issue Type: Sub-task > Components: timelineserver > Reporter: Zhijie Shen > Assignee: Li Lu > Attachments: YARN-3134-040915_poc.patch, YARN-3134-041015_poc.patch, > YARN-3134DataSchema.pdf > > > Quote the introduction on Phoenix web page: > {code} > Apache Phoenix is a relational database layer over HBase delivered as a > client-embedded JDBC driver targeting low latency queries over HBase data. > Apache Phoenix takes your SQL query, compiles it into a series of HBase > scans, and orchestrates the running of those scans to produce regular JDBC > result sets. The table metadata is stored in an HBase table and versioned, > such that snapshot queries over prior versions will automatically use the > correct schema. Direct use of the HBase API, along with coprocessors and > custom filters, results in performance on the order of milliseconds for small > queries, or seconds for tens of millions of rows. > {code} > It may simply our implementation read/write data from/to HBase, and can > easily build index and compose complex query. -- This message was sent by Atlassian JIRA (v6.3.4#6332)