Problems with uk.pool.ntp.org stability

How Nutanix helped us uncover an unexpected issue with a public NTP source For many years now we have, by default, used uk.pool.ntp.org as an NTP source to synchronise time on all our systems. It is becoming increasingly important to keep all systems tightly integrated to a common time reference. This is especially the case with distributed clusters now becoming more common with the advent of Hyperconverged systems. Recently we had started to get alerts on our Nutanix cluster. It started with one cluster, so with Nutanix we were investigating any configuration or networking issues that could be causing it. Then when two other clusters on another site started displaying errors then we began to suspect it was the time source – unlikely as that seems. The problem was intermittent, and determined with a built in NTP configuration check performed hourly by the Nutanix system. We were getting errors reported between 5% and 15% of the time, which varied by node. Every time an error was detected it raised an alert, which was getting wearing, so we had to make some sort of change. All change! We therefore changed all systems over to time.google.com – Google’s new (as of last December) free NTP source. We use their Global DNS Cloud service, so assuming that the level of reliability would be the same we decided to at least try this alternate time source. Immediately the errors stopped. So this indicates that there is a problem server int he UK NTP Org pool. As we’d been having trouble for weeks on and off it doesn’t look like it’s going to get...
Millennia’s Up for a Gong!

Millennia’s Up for a Gong!

We are excited to have been notified that were are a finalist in the Cloud Hosting Awards 2016, being held in London on October 20th 2016. Our nomination is for the implementation of our disaster recovery platform utilising Nutanix, and the article summarising our entry is reproduced below. Wish us luck on the night – hopefully we’ll come back winners! Give us a call on 0333 335 6780 if you want to know more about the project, our experience with Nutanix or our services.   Just the ticket     Millennia is a Cloud-enabled managed hosting provider that has simplified and transformed the data centre by building on software-defined technologies. Turning to Nutanix’ Enterprise Cloud solution, Millennia has been able to harness a platform which leverages web-scale engineering and consumer-grade design to natively converge compute, virtualisation and storage into a resilient, software-defined solution – with the result being an 83% RAM overhead saving across its disaster recovery capabilities. Millennia was one of the first MSPs to adopt Nutanix in the UK. Yorkshire-based hosting company Millennia Computer Services has overhauled the disaster recovery capabilities of its data centre to support the mission critical systems of its leisure and theatre ticketing customers. With many of Millennia’s customers handling terabytes of data and millions of transactions, the company sought a robust DR solution to replace the existing server and storage area network infrastructure in which disparate systems had led to frequent incompatibility and reliability issues which had proven to be time consuming to address. On a tight budget, Millennia originally turned to a low cost Hyper Converged Infrastructure (HCI) vendor, but the...