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https://issues.apache.org/jira/browse/STORM-876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15007572#comment-15007572
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ASF GitHub Bot commented on STORM-876:
--------------------------------------
Github user knusbaum commented on a diff in the pull request:
https://github.com/apache/storm/pull/845#discussion_r44997502
--- Diff: storm-core/src/clj/backtype/storm/daemon/supervisor.clj ---
@@ -732,25 +863,89 @@
(if (conf SUPERVISOR-RUN-WORKER-AS-USER)
(worker-launcher-and-wait conf (storm-conf TOPOLOGY-SUBMITTER-USER)
["code-dir" dir] :log-prefix (str "setup conf for " dir))))
+(defn setup-blob-permission [conf storm-conf path]
+ (if (conf SUPERVISOR-RUN-WORKER-AS-USER)
+ (worker-launcher-and-wait conf (storm-conf TOPOLOGY-SUBMITTER-USER)
["blob" path] :log-prefix (str "setup blob permissions for " path))))
+
+(defn setup-storm-code-dir [conf storm-conf dir]
+ (if (conf SUPERVISOR-RUN-WORKER-AS-USER)
+ (worker-launcher-and-wait conf (storm-conf TOPOLOGY-SUBMITTER-USER)
["code-dir" dir] :log-prefix (str "setup conf for " dir))))
--- End diff --
It might be nice to break these function calls up, but that's really
nit-picky. Not a big deal at all.
> 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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