Month: May 2015


Microsoft Windows 7 virtual machines running on ESXi 6.0 hosts restart unexpectedly There has been a new bug reported by VMware that is currently unsolved and causes MS Windows 7 VMs to restart without any warning on an ESXi 6.0 host. If you can find entries like the following within the vmkwarning.log files then you’re affected. …

vmware-kb-windows-7-virtual-machines-running-on-esxi-6-0-hosts-restart-unexpectedly Read More »


How we use New Relic and Docker at Opvizor New Relic, Inc, the software analytics company, announced recently an addition of features for Docker container monitoring, currently in open public beta.  Docker is now widely used, or at least evaluated, in enterprise environments for its strong modularization and application distribution capabilities. Docker containers can be …

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VMware Backup using Changed Block Tracking failed after upgrading to VMware ESXi 6.0 VMware published a fix for the CBT issue causing VMware backups to fail when using VMware ESXi 6.0 as the hypervisor. So far the workaround was to disable Changed Block Tracking that caused long backup windows. All customers that were using CBT to backup …

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Lots of users were scared when reading about the latest vulnerability – VENOM, that attacks virtual machines through the virtual floppy drive. Photo courtesy of Crowdstrike VENOM, CVE-2015-3456is a security vulnerability in the virtual floppy drive code used by many computer virtualization platforms. This vulnerability may allow an attacker to escape from the confines …

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As you know as a reader of our blog posts, we cover also Knowledge Base articles that describe what we continously see in customers’ environments. After releasing many blog articles and product features as well as products covering VMware VM snapshots we received a lot of feedback regarding Snapshot related issues from the community. One …

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Virtualization is an indispensable part of a modern data center.  Frequently, the degree of virtualization is 90 percent or more.  What formerly operated on a number of servers today runs on a few hosts.  With the high rate of virtualization and the resulting increase in complexity, problems are more difficult to locate.  It is therefore …

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We received so many requests about monthly payment options especially from customers running smaller VMware vSphere environments, that we decided to react. It’s Spring time, so we had some ideas. Photo courtesy of SpaceShoe [Learning to live with the crisis](CC Attribution) Therefore you might already have noticed the current promotions that are running. We just …

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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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