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https://issues.apache.org/jira/browse/STORM-876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14987507#comment-14987507
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ASF GitHub Bot commented on STORM-876:
--------------------------------------
Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/845#discussion_r43765581
--- Diff: conf/defaults.yaml ---
@@ -112,6 +112,20 @@ transactional.zookeeper.root: "/transactional"
transactional.zookeeper.servers: null
transactional.zookeeper.port: null
+## blobstore configs
+supervisor.blobstore.class: "backtype.storm.blobstore.NimbusBlobStore"
+supervisor.blobstore.download.thread.count: 5
+supervisor.blobstore.download.max_retries: 3
+supervisor.localizer.cache.target.size.mb: 10240
+supervisor.localizer.cleanup.interval.ms: 600000
+
+nimbus.blobstore.class: "backtype.storm.blobstore.LocalFsBlobStore"
+nimbus.blobstore.expiration.secs: 600
+
+storm.blobstore.inputstream.buffer.size.bytes: 65536
+client.blobstore.class: "backtype.storm.blobstore.NimbusBlobStore"
+blobstore.replication.factor: 3
--- End diff --
The naming of some of these configs seems inconsistent. Should
`blobstore.replication.factor` be `storm.blobstore.replication.factor`?
> 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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