Cloud Storage Nabil Abdennadher nabil.abdennadher@hesge.ch 1 - - PowerPoint PPT Presentation

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Cloud Storage

Nabil Abdennadher

nabil.abdennadher@hesge.ch

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Cloud storage

• Objective
• Provide logical storage pools that

abstract a more complex distributed infrastructure made of commodity hardware

• Separate storage service from

storage deployment

• As a Service
• A logical storage pool accessible
• ver the network
• As a System
• A distributed architecture spanning
• ver multiple servers

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• Cloud storage interfaces
• Block storage
• Object storage

Block storage

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• Block storage devices provide fixed-sized

raw storage capacity.

• Each storage volume can be treated as an

independent disk drive and controlled by an external server operating system.

• Block device can be mounted by the guest
• perating system as if it were a physical

disk.

• Block storage is the most commonly used

storage type for most applications.

• Block storage can be either locally or

network attached.

• Not usable by humans without a filesystem

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Block storage access

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File storage (filesystems)

Block storage use-cases

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• Databases: DBs require consistent I/O performance and low-

latency connectivity.

• RAID Volumes: combine multiple disks organized through

stripping or mirroring.

• Running mission-critical applications

Cloud Block storage

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• AWS Elastic Block Storage (EBS):attach to your ec2
• instances. You can create EBS General Purpose (SSD) and

Provisioned IOPS (SSD) volumes up to 16 TB in size, and slower, legacy magnetic volumes.

• Rackspace Cloud Block Storage
• Azure Premium Storage
• Google Persistent Disks: Two types of block storage are

available: Standard Persistent Disk and Solid-State Persistent Disks.

• Cinder: Block Storage service for OpenStack

Object storage

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Object storage access : r/w

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Object storage

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• Data kept on object storage devices are accessed directly

through APIs or http/https.

• Data : photos, videos, and log files.
• The object store guarantees that the data will not be lost.
• Object storage data can be replicated across different data

centers and offer simple web services interfaces for access.

• Anyone who’s stored a picture on Facebook has used object

storage.

Object Data contains three things …

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• The data itself: the data can be anything you want to store.
• Metadata: the metadata is defined by the user; it contains

contextual information: what data should be used for, its confidentiality, etc.

• A globally unique identifier: the identifier is an address given

to the object in order for the object to be found over a distributed system. This way, it’s possible to find the data without having to know the physical location of the data.

Object storage use-cases

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• Storage of unstructured data like music, image, and video

files.

• Storage for backup files database dumps, and log files.
• Application developers who deal with large amounts of user-

generated media, using object storage to store unlimited media files.

• As data stores scale to hundreds of terabytes and then into

the petabyte range and beyond, object storage becomes even more attractive.

Object storage use-cases

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Object storage use-cases

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• Amazon S3: Amazon S3 stores data as objects within

resources called “buckets.”

• Rackspace Cloud Files
• Azure Blob Storage
• Google cloud storage
• Swift: Object Storage service for OpenStack