From 05c2214b41f4c0fd17b6f0c62e26398b963efe64 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christophe=20Pr=C3=A9aud?= <christophe.preaud@kelkoo.com> Date: Tue, 24 Mar 2015 17:05:49 -0700 Subject: [PATCH] [SPARK-6469] Improving documentation on YARN local directories usage MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Clarify the local directories usage in YARN Author: Christophe Préaud <christophe.preaud@kelkoo.com> Closes #5165 from preaudc/yarn-doc-local-dirs and squashes the following commits: 6912b90 [Christophe Préaud] Fix some formatting issues. 4fa8ec2 [Christophe Préaud] Merge remote-tracking branch 'upstream/master' into yarn-doc-local-dirs eaaf519 [Christophe Préaud] Clarify the local directories usage in YARN 436fb7d [Christophe Préaud] Revert "Clarify the local directories usage in YARN" 876ae5e [Christophe Préaud] Clarify the local directories usage in YARN 608dbfa [Christophe Préaud] Merge remote-tracking branch 'upstream/master' a49a2ce [Christophe Préaud] Merge remote-tracking branch 'upstream/master' 9ba89ca [Christophe Préaud] Ensure that files are fetched atomically 54419ae [Christophe Préaud] Merge remote-tracking branch 'upstream/master' c6a5590 [Christophe Préaud] Revert commit 8ea871f8130b2490f1bad7374a819bf56f0ccbbd 7456a33 [Christophe Préaud] Merge remote-tracking branch 'upstream/master' 8ea871f [Christophe Préaud] Ensure that files are fetched atomically --- docs/running-on-yarn.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md index 68b1aeb8eb..d9f3eb2b74 100644 --- a/docs/running-on-yarn.md +++ b/docs/running-on-yarn.md @@ -274,6 +274,6 @@ If you need a reference to the proper location to put log files in the YARN so t # Important notes - Whether core requests are honored in scheduling decisions depends on which scheduler is in use and how it is configured. -- The local directories used by Spark executors will be the local directories configured for YARN (Hadoop YARN config `yarn.nodemanager.local-dirs`). If the user specifies `spark.local.dir`, it will be ignored. +- In `yarn-cluster` mode, the local directories used by the Spark executors and the Spark driver will be the local directories configured for YARN (Hadoop YARN config `yarn.nodemanager.local-dirs`). If the user specifies `spark.local.dir`, it will be ignored. In `yarn-client` mode, the Spark executors will use the local directories configured for YARN while the Spark driver will use those defined in `spark.local.dir`. This is because the Spark driver does not run on the YARN cluster in `yarn-client` mode, only the Spark executors do. - The `--files` and `--archives` options support specifying file names with the # similar to Hadoop. For example you can specify: `--files localtest.txt#appSees.txt` and this will upload the file you have locally named localtest.txt into HDFS but this will be linked to by the name `appSees.txt`, and your application should use the name as `appSees.txt` to reference it when running on YARN. - The `--jars` option allows the `SparkContext.addJar` function to work if you are using it with local files and running in `yarn-cluster` mode. It does not need to be used if you are using it with HDFS, HTTP, HTTPS, or FTP files. -- GitLab