Month: March 2015

restarting-vmware-vcenter-service-triggers-large-amount-of-drs-vmotions

  A customer of us was affected by a large number of DRS vMotions and could find that using our vMotion/Storage vMotion report. That report tracks all vMotion and Storage vMotion activities and can be a great help to find large amounts of VM migrations and large vmdk data transfers. He noticed that all the …

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esxi-hosting-passive-mscs-nodes-with-rdm-luns-may-take-a-long-time-to-boot

Again we present one of the common issues we find in our statistics that shows how often customers run into situations like that. Today we cover the problem of a Passive MSCS cluster with RDM and long boot times. You can read more here: ESXi Hosts Hosting Passive MSCS Nodes With RDM LUNs May Take A …

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fix-vm-snapshot-in-vmware-vsphere-when-file-lock-cannot-be-released

[row narrowcontent="true" padding="both" paddingtype="small" animation="fadeInUp"] Fix VM snapshot in VMware vSphere when file lock cannot be released Finding VMware snapshots can already be a nasty and difficult task as some of these hidden or just hard to find as the vSphere environment is pretty large. Therefore it’s important to have scripts, reports and tools like …

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vm-disk-is-missing

We continue in presenting different very common VMware issues that can occur. This is based on our statistics and how often customers ran into situations like that. Today we cover the problem of a missing vmdk file that causes the start of a VMware virtual machine to start. You can read more here: https://www.opvizor.com/virtual-disk-of-vm-is-missing

evolutionary-vmware-infrastructure-monitoring-with-predictive-analytics

As more and more physical servers are moved into the virtual infrastructure, administrators must ensure that they are monitoring their virtual infrastructure to prevent performance issues, misconfigurations, and capacity bottlenecks before they cause degradation of critical enterprise applications. Unfortunately, most of the virtualization monitoring solutions available today don’t make that task an easy one. While …

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vm-gets-unresponsive-when-removing-a-snapshot-snapshot-consolidation

A customer of us informed us about the following situation he ran into. Some of his VMware vSphere VMs became unresponsive for about an our (based on VMware KB article it can be 30 minutes or much longer) when he removed a VM snapshot. Issue cause As written in VMware KB article 2039754 the issue …

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vmware-vsphere-vm-snapshot-size-and-age-issues

Introduction Virtual machine snapshots are one of the most useful features of VMware vSphere as they preserve the state of a virtual machine’s virtual disk and, optionally, virtual memory before a critical event such as an application upgrade or configuration change. VM Snapshots are also taken by most virtualization backup applications at the start of …

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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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