CSS Wizardry

DECEMBER 9, 2023

A trivial performance optimisation to help speed up third-party or other-origin requests is to preconnect them: hint that the browser should preemptively open a full connection ( DNS , TCP , TLS ) to the origin in question, for example: In the right circumstances, this simple, single line of HTML can make pages hundreds of milliseconds faster !

Speed 234

Speed Network Analytics Availability 234

Rigor

JULY 7, 2020

A DNS Prefetch is a resource hint to make a DNS lookup for a domain the browser has not yet determined needs to be made. This can improve performance because when the browser does need to make a request for a resource, the DNS lookup for that domain has already. The post What is a DNS Prefetch? appeared first on Rigor.

Performance 52

Performance DevOps 52

DZone

OCTOBER 26, 2023

The number of monitored network devices grew to several hundred, and we added monitoring for VPN tunnels, physical servers, VMware vCenter, virtual machines, and some services like DNS and NTP.

Monitoring 268

Monitoring Systems DevOps Virtualization 268

O'Reilly Software

APRIL 30, 2018

Harnessing DNS for traffic steering, load balancing, and intelligent response. Managed DNS, as your gateway to the internet, can provide improved resilience to ensure your applications are always available. As the pace and complexity of application development and delivery have increased, the role of DNS has changed considerably.

Cloud 68

Cloud Traffic Internet Internet 68

Scalegrid

NOVEMBER 23, 2023

Troubleshoot common issues such as port conflicts and DNS resolution problems to ensure a secure environment. Incorrect setup might cause issues like not being able to link up or having certificate mismatching problems, difficulties connecting remotely as well as DNS resolution complications.

Database 130

Database Servers Storage Network 130

Dynatrace

OCTOBER 18, 2022

the standard lookups include interpolators that could make this vulnerability exploitable: “script” to execute expressions using the JVM (or Java Virtual Machine) script execution engine (javax.script), “dns” to resolve DNS records. Starting with version 1.5, url” to load values from remote servers via URLs.

Java 225

Java Open Source Virtualization Code 225

Dynatrace

DECEMBER 9, 2020

DNS lookup time : Amount of time taken to resolve the host name—If there are multiple DNS calls because of a redirect, this is the total time of all DNS calls. . Third-party monitors are also a good way to perform synthetic DNS lookups, port checks, and pings, as my colleague Michael Lundstrom describes in his blog post. .

Monitoring 244

Monitoring Mobile Availability Design 244

All Things Distributed

DECEMBER 5, 2010

Expanding the Cloud with DNS - Introducing Amazon Route 53. I am very excited that today we have launched Amazon Route 53, a high-performance and highly-available Domain Name System (DNS) service. DNS is one of the fundamental building blocks of internet applications and was high on the wish list of our customers for some time already.

Cloud 117

Cloud Internet Internet AWS 117

Dotcom-Montior

FEBRUARY 29, 2016

A DNS related exploit of Unix and Linux based operating systems has been gaining attention lately. This library is commonly used in linux… The post GLibC DNS Exploit in Unix/Linux Machines appeared first on Dotcom-Monitor Web Performance Blog.

C++ 44

C++ Operating System Monitoring Systems 44

Dynatrace

MAY 17, 2023

DNS query time indicates the average response times of DNS requests across the system. Monitoring DNS query time is important for understanding network latency, ensuring that services are available, troubleshooting issues, and optimizing application performance.

Metrics 173

Metrics Database Monitoring Network 173

Dynatrace

JULY 21, 2020

Whether you need to make sure that your SQL database is listening on port 1433 even when there is no traffic, that your switch is responding to a ping or that your DNS server is up and running, the more devices you proactively monitor, the quicker you can react to unforeseen events. Platform extensions.

Infrastructure 153

Infrastructure Monitoring Open Source Traffic 153

IO River

NOVEMBER 2, 2023

‍Load Balancing ApproachesNow that we’ve established the “why,” let’s talk about the “how.” There are numerous ways to implement CDN Load Balancing, but the main approaches are limited to two: DNS-based Load Balancing and CDN Load Balancer. As part of this, the CDN sends a DNS resolution request.

Traffic 52

Traffic Cache Servers Latency 52

Dynatrace

APRIL 8, 2022

In the example below, a user configured Davis to alert on problems with DNS queries in a Kubernetes cluster. To accomplish this, the user recoded DNS query responses in a dedicated log file and created a custom metric for the number of search lines with an alerting threshold of 2.

Metrics 181

Metrics Analytics Software Architecture Open Source 181

Dynatrace

APRIL 8, 2021

To improve DNS load-balancing performance, Web UI traffic is by default disabled when installing 13th and following node (or 7th and following in a datacenter for Premium HA ). Rack name selection was added to the new node installation wizard for a rack-aware deployment. Installation and upgrade.

Traffic 141

Traffic Storage Internet Internet 141

Percona

JULY 3, 2023

or higher for a client, metrics will accumulate on the client automatically up to 1GB before any gaps in metrics appear once complete. **There’s a known issue that pmm-client doesn’t pick up the DNS change without restarting the client, but vmagent (what actually sends the metrics to the server) will.as

Open Source 77

Open Source Metrics Monitoring Operating System 77

Alex Russell

JANUARY 5, 2022

DNS , the "Domain Name System" that allows servers running at opaque and forgettable IP addresses to be found at friendlier names, like infrequently.org. DNS is central to URLs, and URLs and links underpin the web. To be on the web is to be linked to and linked from — very literally, connected by edges in a great graph.

Blockchain 111

Blockchain Media Transportation Internet 111

IO River

NOVEMBER 2, 2023

There are numerous ways to implement CDN Load Balancing, but the main approaches are limited to two: DNS-based Load Balancing and CDN Load Balancer. Let’s take a look at both below:‍DNS as a Load Balancer‍The Domain Name System (DNS) is the internet’s phone book. As part of this, the CDN sends a DNS resolution request.

Traffic 40

Traffic Cache Network Servers 40

Dynatrace

APRIL 8, 2022

In the example below, a user configured Davis to alert on problems with DNS queries in a Kubernetes cluster. To accomplish this, the user recoded DNS query responses in a dedicated log file and created a custom metric for the number of search lines with an alerting threshold of 2.

Metrics 130

Metrics Analytics Software Architecture Open Source 130

High Scalability

AUGUST 22, 2018

In the early days of the internet the internet was protocol driven, decentralized, and often distributed—FTP (1971), Telnet (<1973), FINGER (1971/1977), TCP/IP (1974), UUCP (late 1970s) NNTP (1986), DNS (1983), SMTP (1982), IRC(1988), HTTP(1990), Tor (mid-1990s), Napster(1999), and XMPP(1999).

Internet 220

Internet Internet Google Scalability 220

Dotcom-Montior

MARCH 27, 2022

DNS Poisoning/Spoofing. Any website request initially goes to the DNS server to fetch the IP address of the website and accesses it on the responded address. If the response from the DNS is incorrect, you won’t be able to access the website. China does exactly that for blocking commonly known websites.

Website 82

Website Internet Internet Performance 82

Percona

SEPTEMBER 28, 2023

Case 1: When you have members in the replica set as DNS names. priority = 1 rs.reconfig(cfg) Case 2: When you have members in the shard/replica set as IPs, not as DNS name. For more details, check the Initialize Amazon EBS volumes on Linux doc. sudo dd if=/dev/xvdf of=/dev/null bs=1M And then mount the volume to a directory.

Open Source 81

Open Source Cloud Servers Testing 81

Smashing Magazine

APRIL 17, 2019

DNS Prefetching. A DNS lookup is the process of turning a human-friendly domain name like example.com into the machine-friendly IP address like 123.54.92.4 For a busy page with lots of external resources (like perhaps a news website with loads of ads and trackers), there might be dozens of DNS lookups required per page.

Performance 106

Performance Games Servers Cache 106

CSS - Tricks

APRIL 28, 2022

We’ll be changing DNS records and, depending on your web app, you may have to add some cache headers in order to prevent certain assets from ever being cached. Setting up our DNS. That means we’ll have to modify our DNS settings. We need to demonstrate to Amazon that we do, in fact, control the DNS for this domain.

Cache 79

Cache AWS Servers Traffic 79

Dynatrace

OCTOBER 15, 2020

Building a web application like foxy that depends on the Go standard library net package results in a dynamically linked Go binary, because the default DNS name resolver requires cgo and its accompanying system libraries. However, many Go users force the Go toolchain to use the pure Go DNS name resolver by disabling cgo.

Transportation 185

Transportation Monitoring Metrics Code 185

Dotcom-Montior

JUNE 25, 2020

DNS Poisoning/Spoofing. Any website request initially goes to the DNS server to fetch the IP address of the website and accesses it on the responded address. If the response from the DNS is incorrect, you won’t be able to access the website. China does exactly that for blocking commonly known websites.

Website 97

Website Internet Internet Performance 97

Dynatrace

JUNE 5, 2020

Add new TXT resource record with copied value to your domain’s DNS configuration. It typically takes a few minutes for a record to propagate through the DNS system and the value to become available for Dynatrace to verify. To verify a domain, in the Verify domain section on SCIM configuration page: Enter your domain.

Azure 138

Azure Government Tuning Systems 138

High Scalability

APRIL 16, 2019

After slave promotion, the Resource Agent triggers a DNS rerouting module. The module updates the proxy DNS entry with the IP address of the new master, thus, facilitating all application writes to be redirected to the new master. Pacemaker also sets up the available slaves to start replicating from this new master.

Availability 149

Availability Network Azure AWS 149

Smashing Magazine

JUNE 20, 2019

We are going to take a look at two types of resource hint: ‘ DNS Prefetching ’ and ‘ Preconnect ’. DNS Prefetching. DNS prefetching allows the browser to start the connection to Google’s Fonts API ( fonts.googleapis.com ) as soon as the page begins to load. So your web page will still load normally.

Google 111

Google Performance Cache Website 111

Dynatrace

JUNE 27, 2023

This is achieved either by Dynatrace AWS S3 forwarder or log processing mechanisms in Dynatrace.

AWS 200

AWS Cloud Lambda Analytics 200

Speed Curve

JUNE 4, 2023

Override DNS in a script – This script creates a fake DNS entry, forces a resolution to the localhost, sets a cookie on the domain, and navigates to the URL. Submit a login form – Example scripts that authenticate the browser session in different ways.

Testing 52

Testing Cache Metrics Processing 52

Dotcom-Montior

JUNE 30, 2021

DNS Time: waiting for data from DNS. Generally speaking, the DNS issue might be caused by the transfer speed of the web server being too slow or resource size being too large. DNS Time: waiting for data from DNS. Number of Hosts Connected. Different problems happened in different hosts each time. First Byte Time.

Website 52

Website Monitoring Website Performance Performance 52

Percona

JULY 7, 2023

DNS load balancing distributes application connections across multiple PostgreSQL database servers using the Domain Name System (DNS). With DNS load balancing, DNS records with the same hostname but different IP addresses are configured.

Availability 84

Availability Open Source Architecture Database 84

Smashing Magazine

NOVEMBER 19, 2021

Great question, these types of domain stem from Wildcard DNS Records which look like this: *.example. When used, this DNS record will cause any subdomain that matches with the wildcard to hold a TXT value of: “Wild! If you’re hosting on a custom server, wildcard domains will be a breeze to set up through DNS. A “wildcard”?

Servers 83

Servers Website Code Best Practices 83

Dotcom-Montior

AUGUST 5, 2020

including DNS, Connection, SSL, Request, First packet, and Download. The Dotcom-Monitor platform also offers solutions to monitor your Internet Infrastructure, such web servers and DNS servers. A slow DNS resolution can translate to slow web page performance. Optimize Your Pages.

Website 92

Website Speed Cache Traffic 92

Dynatrace

AUGUST 28, 2020

Azure Private DNS Zone. Azure Data Lake Analytics. Azure Data Lake Storage Gen1. Azure Event Grid. Azure Event Hubs Cluster. Azure Maps Account. Azure Firewall. Azure Network Interface. Azure Public IP Address. Azure Search Service.

Azure 156

Azure Cloud Tuning Monitoring 156

Dotcom-Montior

JUNE 25, 2021

DNS Poisoning/Spoofing. Any website request initially goes to the DNS server to fetch the IP address of the website and accesses it on the responded address. If the response from the DNS is incorrect, you won’t be able to access the website. China does exactly that for blocking commonly known websites.

Website 52

Website Internet Internet Performance 52

High Scalability

AUGUST 13, 2018

In the early days of the internet the internet was protocol driven, decentralized, and often distributed—FTP (1971), Telnet (<1973), FINGER (1971/1977), TCP/IP (1974), UUCP (late 1970s) NNTP (1986), DNS (1983), SMTP (1982), IRC(1988), HTTP(1990), Tor (mid-1990s), Napster(1999), and XMPP(1999).

Internet 116

Internet Internet Google Scalability 116