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https://issues.apache.org/jira/browse/STORM-876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15012136#comment-15012136
]
ASF GitHub Bot commented on STORM-876:
--------------------------------------
Github user d2r commented on a diff in the pull request:
https://github.com/apache/storm/pull/845#discussion_r45267929
--- Diff: storm-core/src/jvm/backtype/storm/Config.java ---
@@ -980,6 +980,126 @@
public static final String SUPERVISOR_SLOTS_PORTS =
"supervisor.slots.ports";
/**
+ * What blobstore implementation the supervisor should use.
+ */
+ @isString
+ public static final String SUPERVISOR_BLOBSTORE =
"supervisor.blobstore.class";
+ public static final Object SUPERVISOR_BLOBSTORE_SCHEMA = String.class;
+
+ /**
+ * The jvm opts provided to workers launched by this supervisor. All
"%ID%" substrings are replaced
+ * with an identifier for this worker. Also, "%WORKER-ID%",
"%STORM-ID%" and "%WORKER-PORT%" are
+ * replaced with appropriate runtime values for this worker.
+ * The distributed cache target size in MB. This is a soft limit to
the size of the distributed
+ * cache contents.
+ */
+ @isPositiveNumber
+ @isInteger
+ public static final String SUPERVISOR_LOCALIZER_CACHE_TARGET_SIZE_MB =
"supervisor.localizer.cache.target.size.mb";
--- End diff --
This javadoc comment looks like it was copied from somewhere else.
> Dist Cache: Basic Functionality
> -------------------------------
>
> Key: STORM-876
> URL: https://issues.apache.org/jira/browse/STORM-876
> Project: Apache Storm
> Issue Type: Improvement
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Attachments: DISTCACHE.md, DistributedCacheDesignDocument.pdf
>
>
> Basic functionality for the Dist Cache feature.
> As part of this a new API should be added to support uploading and
> downloading dist cache items. storm-core.ser, storm-conf.ser and storm.jar
> should be written into the blob store instead of residing locally. We need a
> default implementation of the blob store that does essentially what nimbus
> currently does and does not need anything extra. But having an HDFS backend
> too would be great for scalability and HA.
> The supervisor should provide a way to download and manage these blobs and
> provide a working directory for the worker process with symlinks to the
> blobs. It should also allow the blobs to be updated and switch the symlink
> atomically to point to the new blob once it is downloaded.
> All of this is already done by code internal to Yahoo! we are in the process
> of getting it ready to push back to open source shortly.
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