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HADOOP-15847. S3Guard testConcurrentTableCreations to set R/W capacity == 0 

Contributed by lqjaclee

Change-Id: I4a4d5b29f2677c188799479e4db38f07fa0591d1
This commit is contained in:
lqjaclee 2019-07-10 18:03:25 +01:00 committed by Steve Loughran
parent 6282c02d7d
commit cd967c75a7
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3 changed files with 13 additions and 7 deletions
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6
hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/testing.md
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@ -854,13 +854,9 @@ and, for test runs in or near the S3/DDB stores, throttling events.
If you want to manage capacity, use `s3guard set-capacity` to increase it
(performance) or decrease it (costs).
For remote `hadoop-aws` test runs, the read/write capacities of "10" each should suffice;
For remote `hadoop-aws` test runs, the read/write capacities of "0" each should suffice;
increase it if parallel test run logs warn of throttling.
Tip: for agility, use DynamoDB autoscaling, setting the minimum to something very low (e.g 5 units), the maximum to the largest amount you are willing to pay.
This will automatically reduce capacity when you are not running tests against
the bucket, slowly increase it over multiple test runs, if the load justifies it.
## <a name="tips"></a> Tips
### How to keep your credentials really safe

10
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/s3guard/ITestS3GuardConcurrentOps.java
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@ -46,6 +46,8 @@ import org.apache.hadoop.fs.s3a.Constants;
import org.apache.hadoop.fs.s3a.S3AFileSystem;
import static org.apache.hadoop.fs.s3a.Constants.S3GUARD_DDB_REGION_KEY;
import static org.apache.hadoop.fs.s3a.Constants.S3GUARD_DDB_TABLE_CAPACITY_READ_KEY;
import static org.apache.hadoop.fs.s3a.Constants.S3GUARD_DDB_TABLE_CAPACITY_WRITE_KEY;
/**
* Tests concurrent operations on S3Guard.
@ -55,6 +57,14 @@ public class ITestS3GuardConcurrentOps extends AbstractS3ATestBase {
@Rule
public final Timeout timeout = new Timeout(5 * 60 * 1000);
protected Configuration createConfiguration() {
Configuration conf = super.createConfiguration();
//patch the read/write capacity
conf.setInt(S3GUARD_DDB_TABLE_CAPACITY_READ_KEY, 0);
conf.setInt(S3GUARD_DDB_TABLE_CAPACITY_WRITE_KEY, 0);
return conf;
}
private void failIfTableExists(DynamoDB db, String tableName) {
boolean tableExists = true;
try {

4
hadoop-tools/hadoop-aws/src/test/resources/core-site.xml
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@ -153,11 +153,11 @@
<!-- Reduce DDB capacity on auto-created tables, to keep bills down. -->
<property>
<name>fs.s3a.s3guard.ddb.table.capacity.read</name>
<value>10</value>
<value>0</value>
</property>
<property>
<name>fs.s3a.s3guard.ddb.table.capacity.write</name>
<value>10</value>
<value>0</value>
</property>
<!--