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What is MAID?

16 Aprile 2024
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Reading Time: 4 minutesMAID (Massive Array of Idle Disks) is a new storage technology for long-term, online storage of persistent data that takes advantage of a newer generation of SATA (Serial Advanced Technology Attachment) disk drives that are designed to be powered on and off and improve energy efficiency. This allows denser packaging of drives in large-scale disk storage systems since only 25% of disks are spinning at any one time. MAID provides for the power management of disks drives, thus creating a new service level for retaining and accessing “archive/persistent” data.

Highlights, vStorage

Are tapes still relevant?

1 Aprile 2024
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LTO Tapes

Reading Time: 4 minutesMore than 10 years ago, I wrote a blog post with the question is backup to tape dead? The answer was no, but what about tapes usage now, on 2024? Data has grow and the demand of solution to manage cold data also. For this reason there is a high investment in cold data storage solution and tape is still relevant also today!

Highlights, vBackup ,

Type of vSphere Guest OS Customization engines for Linux VM

21 Marzo 2024
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Reading Time: 5 minutesVMware vSphere has a guest customization feature to change some guest OS setting for VMs that are cloned of deployed from template. For example to change the computer name, network settings, or timezone settings. Customizing guest operating systems helps prevent conflicts that occur if virtual machines with identical settings are deployed, for example conflicts due to duplicate computer names. For Linux based VM there are two diffent type of guest OS customization engines: But which one is used and which could be preferred?

Highlights, VMware

What is SONiC?

14 Marzo 2024
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Reading Time: 2 minutesSoftware for Open Networking in the Cloud (SONiC) is is a free and open source network operating system based on Linux. SONiC is the open networking solution used in Microsoft’s Azure Cloud: is the networking switch software used in the lower layer of Azure Datacenter fabric (TOR and Aggregation).

Highlights, Microsoft, vNetworking ,

What is a DPU / SmartNIC?

2 Marzo 2024
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Reading Time: 3 minutesA Data Processing Unit (DPU) is a programmable computer processor that is usally tightly integrates a general-purpose CPU with network interface card (NIC) hardware. Sometimes they are called “IPUs” (for “Infrastructure Processing Unit”) or “SmartNICs” (because actually they are implemented in some special Network Interface Cards).

Highlights, vNetworking

Issue with cloned Ubuntu VMs using DHCP configuration

10 Febbraio 2024
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Reading Time: 3 minutesAfter cloning VMs that are running “recent” version of Ubuntu as Guest Operating System (OS) from VM template or a parent VM, the new VMs acquire the same DHCP IP addresses from the DHCP server, no matter if guest customization is applied or not… also if the two VMs have different MAC addressess. And doesn’t matter the type of hypervisor that you are using… but, of course, VMware has documented this issue in this article: Cloned VM acquires the same DHCP IP address towards guest customization process (KB 82229).

General, Highlights

Brownfield vs. Greenfield

2 Febbraio 2024
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Reading Time: 2 minutesGreenfield and brownfield are terms usually used in factory planning and facilities engineering to describe two different approaches to developing or expanding manufacturing facilities. But they are also used in IT to define different deployment scenarios.

Highlights, vDesign none
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