Skip to content

[SPARK-6313] Add config option to disable file locks/fetchFile cache to ... #5036

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 2 commits into from
Closed

[SPARK-6313] Add config option to disable file locks/fetchFile cache to ... #5036

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
5de7eb4
[SPARK-6313] Add config option to disable file locks/fetchFile cache …
nemccarthy Mar 16, 2015
2eaaf42
[SPARK-6313] Update config wording doc for spark.files.useFetchCache
nemccarthy Mar 16, 2015
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion core/src/main/scala/org/apache/spark/util/Utils.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -403,7 +403,8 @@ private[spark] object Utils extends Logging {
useCache: Boolean) {
val fileName = url.split("/").last
val targetFile = new File(targetDir, fileName)
if (useCache) {
val fetchCacheEnabled = conf.getBoolean("spark.files.useFetchCache", defaultValue = true)
if (useCache && fetchCacheEnabled) {
val cachedFileName = s"${url.hashCode}${timestamp}_cache"
val lockFileName = s"${url.hashCode}${timestamp}_lock"
val localDir = new File(getLocalDir(conf))
Expand Down
12 changes: 12 additions & 0 deletions docs/configuration.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -745,6 +745,18 @@ Apart from these, the following properties are also available, and may be useful
the driver, in seconds.
</td>
</tr>
<tr>
<td><code>spark.files.useFetchCache</code></td>
<td>true</td>
<td>
If set to true (default), file fetching will use a local cache that is shared by executors
that belong to the same application, which can improve task launching performance when
running many executors on the same host. If set to false, these caching optimizations will
be disabled and all executors will fetch their own copies of files. This optimization may be
disabled in order to use Spark local directories that reside on NFS filesystems (see
<a href="https://issues.apache.org/jira/browse/SPARK-6313">SPARK-6313</a> for more details).
</td>
</tr>
<tr>
<td><code>spark.files.overwrite</code></td>
<td>false</td>
Expand Down