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Consistent caching mechanism in Titus Gateway

The Netflix TechBlog

In the time since it was first presented as an advanced Mesos framework, Titus has transparently evolved from being built on top of Mesos to Kubernetes, handling an ever-increasing volume of containers. This blog post presents how our current iteration of Titus deals with high API call volumes by scaling out horizontally.

Cache 224
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The Speed of Time

Brendan Gregg

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. Microbenchmark os::javaTimeMillis() on both systems.

Speed 126
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Crucial Redis Monitoring Metrics You Must Watch

Scalegrid

Key Takeaways Critical performance indicators such as latency, CPU usage, memory utilization, hit rate, and number of connected clients/slaves/evictions must be monitored to maintain Redis’s high throughput and low latency capabilities. Similarly, an increased throughput signifies an intensive workload on a server and a larger latency.

Metrics 130
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Edgar: Solving Mysteries Faster with Observability

The Netflix TechBlog

Edgar helps Netflix teams troubleshoot distributed systems efficiently with the help of a summarized presentation of request tracing, logs, analysis, and metadata. Edgar captures 100% of interesting traces , as opposed to sampling a small fixed percentage of traffic. by Elizabeth Carretto Everyone loves Unsolved Mysteries.

Latency 296
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The Speed of Time

Brendan Gregg

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. Microbenchmark os::javaTimeMillis() on both systems.

Speed 52
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5.5 mm in 1.25 nanoseconds

Randon ASCII

It was a lot of fun, and the work was appreciated, so a few months before the console shipped I got a present from the leadership of the project – an entire silicon wafer of Xbox 360 CPUs! One benchmark I wrote measured the L2 cache latency. Finally, the Xbox 360 was designed to run at a higher clock speed, but then shipped at 3.2

Cache 126
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Optimizing CDN Architecture: Enhancing Performance and User Experience

IO River

CDNs use load-balancing techniques to distribute incoming traffic across multiple servers called Points of Presence (PoPs) which distribute content closer to end-users and improve overall performance.Ă‚ When an edge server goes down, end users in the affected region may experience an increase in latency for that specific location.