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https://issues.apache.org/jira/browse/STORM-876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15012053#comment-15012053
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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_r45264704
--- Diff: storm-core/src/clj/backtype/storm/daemon/supervisor.clj ---
@@ -811,6 +993,21 @@
:else (-> value sub-fn (clojure.string/split #"\s+")))))
+(defn create-blobstore-links
+ "Create symlinks in worker launch directory for all blobs"
+ [conf storm-id port worker-id]
+ (let [stormroot (supervisor-stormdist-root conf storm-id)
+ storm-conf (read-supervisor-storm-conf conf storm-id)
+ workerroot (worker-root conf worker-id)
+ blobstore-map (storm-conf TOPOLOGY-BLOBSTORE-MAP)
+ blob-file-names (get-blob-file-names blobstore-map)
+ resource-file-names (cons RESOURCES-SUBDIR blob-file-names)]
+ (log-message "Creating symlinks for worker-id: " worker-id " storm-id:
"
+ storm-id " for files(" (count resource-file-names) "): " (pr-str
resource-file-names))
+ (create-symlink! workerroot stormroot RESOURCES-SUBDIR)
+ (doseq [file-name blob-file-names]
+ (create-symlink! workerroot stormroot file-name file-name))))
--- End diff --
`port` parameter not used?
> 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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