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Subject [GitHub] [hadoop] hadoop-yetus commented on a change in pull request #879: HADOOP-15563 Full S3Guard Support for on-demand DDB tables
Date Fri, 31 May 2019 19:46:03 GMT
hadoop-yetus commented on a change in pull request #879: HADOOP-15563 Full S3Guard Support
for on-demand DDB tables
URL: https://github.com/apache/hadoop/pull/879#discussion_r289528164
 
 

 ##########
 File path: hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/s3guard.md
 ##########
 @@ -1015,20 +1061,33 @@ for S3Guard applications.
 * There's no explicit limit on I/O capacity, so operations which make
 heavy use of S3Guard tables (for example: SQL query planning) do not
 get throttled.
+* You are charged more per DynamoDB API call, in exchange for paying nothing
+when you are not interacting with DynamoDB.
 * There's no way put a limit on the I/O; you may unintentionally run up
 large bills through sustained heavy load.
 * The `s3guard set-capacity` command fails: it does not make sense any more.
 
 When idle, S3Guard tables are only billed for the data stored, not for
-any unused capacity. For this reason, there is no benefit from sharing
-a single S3Guard table across multiple buckets.
+any unused capacity. For this reason, there is no performance benefit
+from sharing a single S3Guard table across multiple buckets.
+
+*Creating a S3Guard Table with On-Demand Tables*
+
+The default settings for S3Guard are to create on-demand tables; this
+can also be done explicitly in the `s3guard init` command by setting the
+read and write capacities to zero.
 
-*Enabling DynamoDB On-Demand for a S3Guard table*
 
-You cannot currently enable DynamoDB on-demand from the `s3guard` command
-when creating or updating a bucket.
+```bash
+hadoop s3guard init -meta dynamodb://ireland-team -write 0 -read 0 s3a://ireland-1
+```
 
 Review comment:
   whitespace:end of line
   

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