Measure IOPS is a very important task for any serious VMware vSphere Admin. Not just knowing what systems are utilizing most of my expensive storage, but also if they should be so greedy.

Measure IOps VM

The input/output operations per second (IOps) metric of any system is a key way to measure how much data is being exchanged between the storage and the related system. In a virtual environment is becomes enormously important as many virtual machines are sharing the same datastore and the same storage system. If one VM produces a ridiculous amount of transactions reading and/or writing to the disk it can have very negative effects to the overall storage performance.

Finding noisy neighbors, so Virtual Machines that use so many resources that other VMs running next to them encounter performance issues, can be tricky. Therefore, you should make sure to use the right tools to detect and visualize these.

It definitely helps to know the hosts drive or storage connection and the storage itself can handle. This is critical to setup the right thresholds. When troubleshooting issues and trying to map out your future capacity needs.

Virtual Machine Disk metrics

Again, without a monitoring tool (and it does not need to be expensive) it can and will be horribly time consuming. Even if you know how to interpret esxtop, it only shows a single ESXi host at a time. Multiple hosts are no fun to monitor using local tools on the host console, trying to gather the IOPS information.

When speaking about ESXi hosts, you should also be able to check for the latency and IOps of these guys in the same console.

VMware ESXi Disk Latency and IOps

It would be kind of cool to merge these information in an easy way, right? I would think so / and here we go:

Compare ESXi and VM IOps

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Use Case - Tamper-resistant Clinical Trials


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.).


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


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.


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


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, …)


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


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.


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


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.


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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