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HADOOP-19015. Increase fs.s3a.connection.maximum to 500 to minimize risk of Timeout waiting for connection from pool. #6372

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Merged
merged 3 commits into from
Jan 16, 2024
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HADOOP-19015. Increase fs.s3a.connection.maximum to 500 to minimize risk of Timeout waiting for connection from pool. #6372

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c21122e
HADOOP-19015. Increase fs.s3a.connection.maximum to 500 to minimize …
mukund-thakur Dec 19, 2023
6c35854
add extra line for yetus to rerun
mukund-thakur Dec 21, 2023
a9703ef
updating performance.md doc
mukund-thakur Jan 2, 2024
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3 changes: 2 additions & 1 deletion hadoop-common-project/hadoop-common/src/main/resources/core-default.xml
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Expand Up @@ -1530,14 +1530,15 @@

<property>
<name>fs.s3a.connection.maximum</name>
<value>200</value>
<value>500</value>
<description>Controls the maximum number of simultaneous connections to S3.
This must be bigger than the value of fs.s3a.threads.max so as to stop
threads being blocked waiting for new HTTPS connections.
Why not equal? The AWS SDK transfer manager also uses these connections.
</description>
</property>


<property>
<name>fs.s3a.connection.ssl.enabled</name>
<value>true</value>
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2 changes: 1 addition & 1 deletion hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/Constants.java
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Expand Up @@ -173,7 +173,7 @@ private Constants() {
* Future releases are likely to increase this value.
* Keep in sync with the value in {@code core-default.xml}
*/
public static final int DEFAULT_MAXIMUM_CONNECTIONS = 200;
public static final int DEFAULT_MAXIMUM_CONNECTIONS = 500;

/**
* Configuration option to configure expiration time of
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2 changes: 1 addition & 1 deletion hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/performance.md
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Expand Up @@ -225,7 +225,7 @@ The choice is yours. Generally recovery is better, but sometimes fail-fast is mo

| Property | Default | V2 | Meaning |
|-----------------------------------------|---------|:----|-------------------------------------------------------|
| `fs.s3a.connection.maximum` | `200` | | Connection pool size |
| `fs.s3a.connection.maximum` | `500` | | Connection pool size |
| `fs.s3a.connection.keepalive` | `false` | `*` | Use TCP keepalive on open channels |
| `fs.s3a.connection.acquisition.timeout` | `60s` | `*` | Timeout for waiting for a connection from the pool. |
| `fs.s3a.connection.establish.timeout` | `30s` | | Time to establish the TCP/TLS connection |
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