A Versatile and Environment friendly Storage System for Numerous Workloads







Apache Ozone is a distributed, scalable, and high-performance object retailer, obtainable with Cloudera Knowledge Platform (CDP), that may scale to billions of objects of various sizes. It was designed as a local object retailer to supply excessive scale, efficiency, and reliability to deal with a number of analytics workloads utilizing both S3 API or the normal Hadoop API.

Immediately’s platform house owners, enterprise house owners, knowledge builders, analysts, and engineers create new apps on the Cloudera Knowledge Platform and so they should resolve the place and easy methods to retailer that knowledge. Structured knowledge (similar to identify, date, ID, and so forth) shall be saved in common SQL databases like Hive or Impala databases. There are additionally newer AI/ML functions that want knowledge storage, optimized for unstructured knowledge utilizing developer pleasant paradigms like Python Boto API.

Apache Ozone caters to each these storage use circumstances throughout all kinds of business verticals, a few of which embrace: 

  • Manufacturing, the place the information they generate can present new enterprise alternatives like predictive upkeep along with enhancing their operational effectivity
  • Retail, the place huge knowledge is used throughout all levels of the retail course of—from product growth,  pricing, demand forecasting, and for stock optimization within the shops.
  • Healthcare, the place huge knowledge is used for enhancing profitability, conducting genomic analysis, enhancing affected person expertise, and to save lots of lives.

Comparable use circumstances exist throughout all different verticals like insurance coverage, finance and  telecommunications. 

On this weblog publish, we are going to speak about a single Ozone cluster with the capabilities of each Hadoop Core File System (HCFS) and Object Retailer (like Amazon S3). A unified storage structure that may retailer each recordsdata and objects and supply a versatile, scalable, and high-performance system. Moreover, knowledge saved in Ozone may be accessed for varied use circumstances through totally different protocols, eliminating the necessity for knowledge duplication, which in flip reduces danger and optimizes useful resource utilization.

Variety of workloads

Immediately’s quick rising data-intensive workloads that drive analytics, machine studying, synthetic intelligence, and sensible programs demand a storage platform that’s each versatile and environment friendly. Apache Ozone natively gives Amazon S3 and Hadoop File System suitable endpoints and is designed to work seamlessly with enterprise scale knowledge warehousing, batch processing, machine studying, and streaming workloads. Ozone helps varied workloads, together with the next distinguished storage use circumstances, primarily based on the character by way of which they’re built-in with storage service:

  1. Ozone as a pure S3 object retailer semantics
  2. Ozone as a substitute filesystem for HDFS to unravel the scalability points
  3. Ozone as a Hadoop Suitable File System (“HCFS”) with restricted S3 compatibility. For instance, for key paths with “/” in it, intermediate directories shall be created
  4. Interoperability of the identical knowledge for a number of workloads: multi-protocol entry

The next are the most important elements of huge knowledge workloads, which require HCFS semantics.

  • Apache Hive: drop desk question, dropping a managed Impala desk, recursive listing deletion, and listing transfer operation are a lot quicker and strongly constant with none partial leads to case of any failure. Please consult with our earlier Cloudera weblog for extra particulars about Ozone’s efficiency advantages and atomicity ensures.
  • These operations are additionally environment friendly with out requiring O(n) RPC calls to the Namespace Server the place “n” is the variety of file system objects for the desk.
  • Job committers of huge knowledge analytics instruments like Apache Hive, Apache Impala, Apache Spark, and conventional MapReduce usually rename their non permanent output recordsdata to a remaining output location on the finish of the job to grow to be publicly seen. The efficiency of the job is straight impacted by how shortly the renaming operation is accomplished.

Bringing recordsdata and objects below one roof

A unified design represents recordsdata, directories, and objects saved in a single system. Apache Ozone achieves this important functionality by way of the usage of some novel architectural selections by introducing bucket sort within the metadata namespace server. This enables a single Ozone cluster to have the capabilities of each Hadoop Core File System (HCFS) and Object Retailer (like Amazon S3) options by storing recordsdata, directories, objects, and buckets effectively. It removes the necessity to port knowledge from an object retailer to a file system so analytics functions can learn it. The identical knowledge may be learn as an object, or a file.

Bucket varieties

Apache Ozone object retailer just lately carried out a multi-protocol conscious bucket structure characteristic in HDDS-5672,obtainable within the CDP-7.1.8 launch model. The concept right here is to categorize Ozone Buckets primarily based on the storage use circumstances.


  • Hierarchical FileSystem namespace view with directories and recordsdata much like HDFS. 
  • Supplies excessive efficiency namespace metadata operations much like HDFS.
  • Supplies capabilities to learn/write utilizing S3 API*.


  • Supplies a flat namespace (key-value) much like Amazon S3.


  • Represents present pre-created Ozone bucket for easy upgrades from earlier Ozone model to the brand new Ozone model.

Creating FSO/OBS/LEGACY buckets utilizing Ozone shell command. Customers can specify the bucket sort within the structure parameter.

  $ozone sh bucket create --layout FILE_SYSTEM_OPTIMIZED /s3v/fso-bucket

  $ozone sh bucket create --layout OBJECT_STORE /s3v/obs-bucket

  $ozone sh bucket create --layout LEGACY /s3v/bucket

BucketLayout Function Demo, describes the ozone shell, ozoneFS and aws cli operations.

Ozone namespace overview

Here’s a fast overview of how Ozone manages its metadata namespace and handles consumer requests from totally different workloads primarily based on the bucket sort. Additionally, the bucket sort idea is architecturally designed in an extensible vogue to assist multi-protocols like NFS, CSI, and extra sooner or later.

Ranger insurance policies

Ranger insurance policies allow authorization entry to Ozone sources (quantity, bucket, and key). The Ranger coverage mannequin captures particulars of:

  1. Useful resource varieties, hierarchy, assist recursive operations, case sensitivity, assist wildcards, and extra 
  2. Permissions/actions carried out on a selected useful resource like learn, write, delete, and checklist
  3. Enable, deny, or exception permissions to customers, teams, and roles

Much like HDFS, with FSO sources, Ranger helps authorization for rename and recursive listing delete operations in addition to gives performance-optimized options regardless of the big set of subpaths (directories/recordsdata) contained inside it.

Workload migration or replication throughout clusters:

Hierarchical file system (“FILE_SYSTEM_OPTIMIZED”) capabilities convey a straightforward migration of workloads from HDFS to Apache Ozone with out important efficiency adjustments. Furthermore, Apache Ozone seamlessly integrates with Apache knowledge analytics instruments like Hive, Spark, and Impala whereas retaining the Ranger coverage and efficiency traits.

Interoperability of knowledge: multi-protocol consumer entry

Customers can retailer their knowledge into an Apache Ozone cluster and entry the identical knowledge through totally different protocols: Ozone S3 API*, Ozone FS, Ozone shell instructions, and so on.

For instance, a person can ingest knowledge into Apache Ozone utilizing Ozone S3 API*, and the identical knowledge may be accessed utilizing Apache Hadoop suitable FileSystem interface and vice versa.

Mainly, this multi-protocol functionality shall be engaging to programs which can be primarily oriented in the direction of File System like workloads, however want to add some object retailer characteristic assist. This may enhance the effectivity of the person platform with on-prem object retailer. Moreover, knowledge saved in Ozone may be shared for varied use circumstances, eliminating the necessity for knowledge duplication, which in flip reduces danger and optimizes useful resource utilization.


An Apache Ozone cluster gives a single unified structure on CDP that may retailer recordsdata, directories, and objects effectively with multi-protocol entry. With this functionality, customers can retailer their knowledge right into a single Ozone cluster and entry the identical knowledge for varied use circumstances utilizing totally different protocols (Ozone S3 API*, Ozone FS), eliminating the necessity for knowledge duplication, which in flip reduces danger and optimizes useful resource utilization.

Briefly, combining file and object protocols into one Ozone storage system affords the advantages of effectivity, scale, and excessive efficiency. Now, customers have extra flexibility in how they retailer knowledge and the way they design functions.

S3 API* – refers to Amazon S3 implementation of the S3 API protocol.

Additional Studying

Introducing Apache Hadoop Ozone

Apache Hadoop Ozone – Object Retailer Structure

Apache Ozone – A Excessive Efficiency Object Retailer for CDP Personal Cloud


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