vsan-what-is-vmware-vsan

Welcome to our vSAN series! 

Mayur Parmar posted interesting articles about VMware vSAN and we would like to share some of the information.

Please scroll down for the first article and find here the original and complete article from Mayur.

What is vSAN?

VMware vSAN is a software defined storage solution from VMware to eliminate the need of the additional storage boxes using the local server storage. In simple words – vSAN abstracts the local storage of ESXi hosts and makes a pool of it to be used as a shared storage which is very much optimized. So as you are using the local storage you will not need an additional storage box for the storing files which also helps in lowering the Total Cost of Ownership (TCO).

vSAN is a very easy to use solution. With a few clicks you can create and configure the storage pool. vSAN also provides the policies referred to as SPBM (Storage Policy Based Management) which can be applied to a single VM or a single sidk based on the requirements.

There are many server vendors which provides the vSAN ready nodes optimized and VMware certified. So you can easily chosse from your preferred vendor which solution you like to use.

vSAN architecture

vSAN Architecture

Photo courtesy of VMware

As you can see in the above image of vSAN Architecture you will easily understand what is vSAN and how it works.

Key Features of vSAN

  • Software defined
  • Integrated with vSphere
  • Simple
  • Flexible
  • Storage policies
  • Deduplication & Compression
  • Encryption
  • Erasure coding
  • All Flash or Hybrid

System Requirements

Hardware Host

  • 1 GB NIC; 10 GB NIC recommended
  • SATA/SAS HBA or RAID controller
  • At least one flash caching device and one persistent storage disk (flash or HDD) for each capacity-contributing node

Cluster Size

  • Min. 2 hosts – Max. 64 hosts

Software

  • VMware vSphere 6.5 EP02 (any edition)
  • VMware vSphere with Operations Management 6.1 (any edition)
  • VMware vCloud Suite 6.0 (any edition updated with 6.5)
  • VMware vCenter Server 6.5

Please find here Mayur’s complete article for more information about vSAN.

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Use Case - Tamper-resistant Clinical Trials

Goal:

Blockchain PoCs were unsuccessful due to complexity and lack of developers.

Still the goal of data immutability as well as client verification is a crucial. Furthermore, the system needs to be easy to use and operate (allowing backup, maintenance windows aso.).

Implementation:

immudb is running in different datacenters across the globe. All clinical trial information is stored in immudb either as transactions or the pdf documents as a whole.

Having that single source of truth with versioned, timestamped, and cryptographically verifiable records, enables a whole new way of transparency and trust.

Use Case - Finance

Goal:

Store the source data, the decision and the rule base for financial support from governments timestamped, verifiable.

A very important functionality is the ability to compare the historic decision (based on the past rulebase) with the rulebase at a different date. Fully cryptographic verifiable Time Travel queries are required to be able to achieve that comparison.

Implementation:

While the source data, rulebase and the documented decision are stored in verifiable Blobs in immudb, the transaction is stored using the relational layer of immudb.

That allows the use of immudb’s time travel capabilities to retrieve verified historic data and recalculate with the most recent rulebase.

Use Case - eCommerce and NFT marketplace

Goal:

No matter if it’s an eCommerce platform or NFT marketplace, the goals are similar:

  • High amount of transactions (potentially millions a second)
  • Ability to read and write multiple records within one transaction
  • prevent overwrite or updates on transactions
  • comply with regulations (PCI, GDPR, …)


Implementation:

immudb is typically scaled out using Hyperscaler (i. e. AWS, Google Cloud, Microsoft Azure) distributed across the Globe. Auditors are also distributed to track the verification proof over time. Additionally, the shop or marketplace applications store immudb cryptographic state information. That high level of integrity and tamper-evidence while maintaining a very high transaction speed is key for companies to chose immudb.

Use Case - IoT Sensor Data

Goal:

IoT sensor data received by devices collecting environment data needs to be stored locally in a cryptographically verifiable manner until the data is transferred to a central datacenter. The data integrity needs to be verifiable at any given point in time and while in transit.

Implementation:

immudb runs embedded on the IoT device itself and is consistently audited by external probes. The data transfer to audit is minimal and works even with minimum bandwidth and unreliable connections.

Whenever the IoT devices are connected to a high bandwidth, the data transfer happens to a data center (large immudb deployment) and the source and destination date integrity is fully verified.

Use Case - DevOps Evidence

Goal:

CI/CD and application build logs need to be stored auditable and tamper-evident.
A very high Performance is required as the system should not slow down any build process.
Scalability is key as billions of artifacts are expected within the next years.
Next to a possibility of integrity validation, data needs to be retrievable by pipeline job id or digital asset checksum.

Implementation:

As part of the CI/CD audit functionality, data is stored within immudb using the Key/Value functionality. Key is either the CI/CD job id (i. e. Jenkins or GitLab) or the checksum of the resulting build or container image.

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