99 lines
4.3 KiB
Markdown
99 lines
4.3 KiB
Markdown
---
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id: cloudfiles
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title: "Rackspace Cloud Files"
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---
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<!--
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~ Licensed to the Apache Software Foundation (ASF) under one
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~ or more contributor license agreements. See the NOTICE file
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~ distributed with this work for additional information
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~ regarding copyright ownership. The ASF licenses this file
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~ to you under the Apache License, Version 2.0 (the
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~ "License"); you may not use this file except in compliance
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~ with the License. You may obtain a copy of the License at
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~
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~ http://www.apache.org/licenses/LICENSE-2.0
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~
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~ Unless required by applicable law or agreed to in writing,
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~ software distributed under the License is distributed on an
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~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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~ specific language governing permissions and limitations
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~ under the License.
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To use this Apache Druid extension, make sure to [include](../../development/extensions.md#loading-extensions) `druid-cloudfiles-extensions` extension.
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## Deep Storage
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[Rackspace Cloud Files](http://www.rackspace.com/cloud/files/) is another option for deep storage. This requires some additional Druid configuration.
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|Property|Possible Values|Description|Default|
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|--------|---------------|-----------|-------|
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|`druid.storage.type`|cloudfiles||Must be set.|
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|`druid.storage.region`||Rackspace Cloud Files region.|Must be set.|
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|`druid.storage.container`||Rackspace Cloud Files container name.|Must be set.|
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|`druid.storage.basePath`||Rackspace Cloud Files base path to use in the container.|Must be set.|
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|`druid.storage.operationMaxRetries`||Number of tries before cancel a Rackspace operation.|10|
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|`druid.cloudfiles.userName`||Rackspace Cloud username|Must be set.|
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|`druid.cloudfiles.apiKey`||Rackspace Cloud API key.|Must be set.|
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|`druid.cloudfiles.provider`|rackspace-cloudfiles-us,rackspace-cloudfiles-uk|Name of the provider depending on the region.|Must be set.|
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|`druid.cloudfiles.useServiceNet`|true,false|Whether to use the internal service net.|true|
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## Firehose
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<a name="firehose"></a>
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#### StaticCloudFilesFirehose
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This firehose ingests events, similar to the StaticAzureBlobStoreFirehose, but from Rackspace's Cloud Files.
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Data is newline delimited, with one JSON object per line and parsed as per the `InputRowParser` configuration.
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The storage account is shared with the one used for Rackspace's Cloud Files deep storage functionality, but blobs can be in a different region and container.
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As with the Azure blobstore, it is assumed to be gzipped if the extension ends in .gz
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This firehose is _splittable_ and can be used by [native parallel index tasks](../../ingestion/native-batch.md#parallel-task).
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Since each split represents an object in this firehose, each worker task of `index_parallel` will read an object.
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Sample spec:
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```json
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"firehose" : {
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"type" : "static-cloudfiles",
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"blobs": [
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{
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"region": "DFW"
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"container": "container",
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"path": "/path/to/your/file.json"
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},
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{
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"region": "ORD"
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"container": "anothercontainer",
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"path": "/another/path.json"
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}
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]
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}
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```
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This firehose provides caching and prefetching features. In IndexTask, a firehose can be read twice if intervals or
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shardSpecs are not specified, and, in this case, caching can be useful. Prefetching is preferred when direct scan of objects is slow.
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|property|description|default|required?|
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|--------|-----------|-------|---------|
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|type|This should be `static-cloudfiles`.|N/A|yes|
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|blobs|JSON array of Cloud Files blobs.|N/A|yes|
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|maxCacheCapacityBytes|Maximum size of the cache space in bytes. 0 means disabling cache.|1073741824|no|
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|maxCacheCapacityBytes|Maximum size of the cache space in bytes. 0 means disabling cache. Cached files are not removed until the ingestion task completes.|1073741824|no|
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|maxFetchCapacityBytes|Maximum size of the fetch space in bytes. 0 means disabling prefetch. Prefetched files are removed immediately once they are read.|1073741824|no|
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|fetchTimeout|Timeout for fetching a Cloud Files object.|60000|no|
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|maxFetchRetry|Maximum retry for fetching a Cloud Files object.|3|no|
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Cloud Files Blobs:
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|property|description|default|required?|
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|--------|-----------|-------|---------|
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|container|Name of the Cloud Files container|N/A|yes|
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|path|The path where data is located.|N/A|yes|
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