[
https://issues.apache.org/jira/browse/STORM-876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15009541#comment-15009541
]
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_r45123190
--- Diff: storm-core/src/clj/backtype/storm/daemon/nimbus.clj ---
@@ -1767,6 +1900,169 @@
topology-id
(doto (GetInfoOptions.)
(.set_num_err_choice NumErrorsChoice/ALL))))
+ ;;Blobstore implementation code
+ (^String beginCreateBlob [this
+ ^String blob-key
+ ^SettableBlobMeta blob-meta]
+ (let [session-id (uuid)]
+ (.put (:blob-uploaders nimbus)
+ session-id
+ (->> (ReqContext/context)
+ (.subject)
+ (.createBlob (:blob-store nimbus) blob-key blob-meta)))
--- End diff --
Here and elsewhere, use helper function `get-subject` instead of code like
`(->> (ReqContext/context) (.subject))`
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
