steveloughran commented on code in PR #6789: URL: https://github.com/apache/hadoop/pull/6789#discussion_r1689944706
########## hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/performance.md: ########## @@ -276,7 +283,45 @@ Fix: Use one of the dedicated [S3A Committers](committers.md). ## <a name="tuning"></a> Options to Tune -### <a name="pooling"></a> Thread and connection pool settings. +### <a name="flags"></a> Performance Flags: `fs.s3a.performance.flag` + +This option takes a comma separated list of performance flags. +View it as the equivalent of the `-O` compiler optimization list C/C++ compilers offer. +That is a complicated list of options which deliver speed if the person setting them +understands the risks. Review Comment: no, its an individual who takes the blame ########## hadoop-tools/hadoop-aws/src/site/markdown/tools/hadoop-aws/performance.md: ########## @@ -276,7 +283,45 @@ Fix: Use one of the dedicated [S3A Committers](committers.md). ## <a name="tuning"></a> Options to Tune -### <a name="pooling"></a> Thread and connection pool settings. +### <a name="flags"></a> Performance Flags: `fs.s3a.performance.flag` + +This option takes a comma separated list of performance flags. +View it as the equivalent of the `-O` compiler optimization list C/C++ compilers offer. +That is a complicated list of options which deliver speed if the person setting them +understands the risks. + +* The list of flags MAY change across releases +* The semantics of specific flags SHOULD NOT change across releases. +* If an option is to be tuned which may relax semantics, a new option MUST be defined. +* Unknown flags are ignored; this is to avoid compatibility. +* The option `*` means "turn everything on". This is implicitly unstable across releases. + +| *Option* | *Meaning* | Since | +|----------|--------------------|:------| +| `create` | Create Performance | 3.4.1 | Review Comment: no -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org
