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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_r44991284 --- Diff: storm-core/src/clj/backtype/storm/command/blobstore.clj --- @@ -0,0 +1,162 @@ +;; Licensed to the Apache Software Foundation (ASF) under one +;; or more contributor license agreements. See the NOTICE file +;; distributed with this work for additional information +;; regarding copyright ownership. The ASF licenses this file +;; to you under the Apache License, Version 2.0 (the +;; "License"); you may not use this file except in compliance +;; with the License. You may obtain a copy of the License at +;; +;; http://www.apache.org/licenses/LICENSE-2.0 +;; +;; Unless required by applicable law or agreed to in writing, software +;; distributed under the License is distributed on an "AS IS" BASIS, +;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +;; See the License for the specific language governing permissions and +;; limitations under the License. +(ns backtype.storm.command.blobstore + (:import [java.io InputStream OutputStream]) + (:use [backtype.storm config]) + (:import [backtype.storm.generated SettableBlobMeta AccessControl AuthorizationException + KeyNotFoundException]) + (:import [backtype.storm.blobstore BlobStoreAclHandler]) + (:use [clojure.string :only [split]]) + (:use [clojure.tools.cli :only [cli]]) + (:use [clojure.java.io :only [copy input-stream output-stream]]) + (:use [backtype.storm blobstore log util]) --- End diff -- Since this is a new file, can we merge all the `use`s and `import`s into one `use` and one `import` form? > 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)