Cloudera Blog

FEBRUARY 12, 2024

In Cloudera deployments on public cloud, one of the key configuration elements is the DNS. If the DNS is set up less ideal than it could be, connectivity and performance issues may arise. In this blog, we’ll take you through our tried and tested best practices for setting up your DNS for use with Cloudera on Azure.

DNS 52

DNS IP Address Server Firewall 52

Kentik

MARCH 13, 2023

What changed Over the last 15 years, though, the quality of the public internet has improved significantly. Yes, there’s something to say about how applications are written, but on the public internet side, we’ve seen a decrease in latency, cost, and a massive increase in available bandwidth. Yes, of course, I’m oversimplifying here.

WAN 98

WAN Wide Area Network Topology Internet 98

Kentik

DECEMBER 13, 2021

Chrome, Internet Explorer, Firefox, Opera). This is sort of a long shot, but are you using a corporate DNS server? You might try temporarily switching to a public DNS like Google’s 8.8.8.8. DNS lookups can introduce significant latency on new connections. Start with the desktop. Notice the arrow above in red.

Application 95

Application DNS Routers Server 95

Kentik

JANUARY 28, 2021

While synthetics can be triggered or collected via device telemetry interfaces, they are actually a broader category spanning client and server endpoints, network elements, and internet-wide locations performing network and application-layer testing. What are my frequently queried domain names and talkative DNS clients?

Network 72

Network Networking DNS IP Address 72

DoorDash Engineering

AUGUST 15, 2023

We decided to seek potential solutions that could provide a more complete and unified picture of our networking topology. For example, our DNS probe has an event with just the network namespace id (netns), process id (pid), and the raw packet data. Our compute team has used DNS data to better understand large spikes in DNS traffic.

DNS 84

DNS TCP Application Network 84

Kentik

MAY 8, 2023

This includes the ability to: Dynamically adjust to changes in network topology Detect and respond to outages Route around faults in order to maintain connectivity and service levels. Additional network resilience mechanisms Successfully routing a packet over the internet from its source to its destination is not trivial.

Network 52

Network Networking IP Address TCP 52

Kentik

SEPTEMBER 20, 2021

Routers and switches : The internet is largely a mesh configuration of network devices that provide connectivity to everywhere we want to connect. After the DNS lookup and the ARP, the host reaches out to the IP address of the destination using a SYN in order to open a connection. Below is the beginning of a TCP handshake.

TCP 116

TCP Routers Bandwidth IP Address 116