Dynatrace

JUNE 1, 2023

Fitness app : The fitness app should offer a response time of less than 500 milliseconds for exercise tracking and data recording. This SLO enables a smooth and uninterrupted exercise-tracking experience. Note : you might hear the term latency used instead of response time.

Latency 179

Latency Website Traffic Virtualization 179

Dynatrace

JUNE 1, 2023

Fitness app : The fitness app should offer a response time of less than 500 milliseconds for exercise tracking and data recording. This SLO enables a smooth and uninterrupted exercise-tracking experience. Note : you might hear the term latency used instead of response time.

Traffic 173

Traffic Latency Website Virtualization 173

SQL Performance

OCTOBER 20, 2022

I’m not going to demonstrate it for space reasons, but if you change the column data type to the deprecated ntext type (which defaults to off-row LOB storage) or use sp_tableoption to store the nvarchar(max) data off-row, locks will be held for longer. This is something to be aware of if you use UPDLOCK hints.

Testing 91

Testing Servers Cache Engineering 91

The Netflix TechBlog

DECEMBER 3, 2019

The infrastructure should allow them to exercise their freedom as data scientists but it should provide enough guardrails and scaffolding, so they don’t have to worry about software architecture too much. both for compute and storage. Metaflow removes this cognitive overhead. Metaflow is a cloud-native framework.

Open Source 232

Open Source AWS Infrastructure Energy 232

SQL Performance

JUNE 10, 2020

The relational model and the standard querying language that is based on it are supposed to deal only with the conceptual aspects of the data and leave the physical implementation details like storage, optimization, access and processing of the data to the database platform (the implementation ). Figure 5: Plan for Query 5.

C++ 109

C++ Database Servers Code 109

SQL Performance

JUNE 10, 2020

The relational model and the standard querying language that is based on it are supposed to deal only with the conceptual aspects of the data and leave the physical implementation details like storage, optimization, access and processing of the data to the database platform (the implementation ). Figure 5: Plan for Query 5.

C++ 93

C++ Database Servers Code 93

The Netflix TechBlog

DECEMBER 3, 2019

The infrastructure should allow them to exercise their freedom as data scientists but it should provide enough guardrails and scaffolding, so they don’t have to worry about software architecture too much. both for compute and storage. Metaflow removes this cognitive overhead. Metaflow is a cloud-native framework.

Open Source 134

Open Source AWS Infrastructure Energy 134

The Morning Paper

DECEMBER 8, 2019

This is left as an exercise for the application developer at present. Crash-consistency by the way is treated as an orthogonal concern and not discussed in this paper. In particular, it’s goodbye to the POSIX interface. What about security?

Hardware 56

Hardware Programming Media Storage 56

SQL Performance

NOVEMBER 30, 2021

Whether the page is dirty or not (a dirty page has changes on it that haven’t yet been written back to durable storage). The last time the page was referenced (used by the lazy writer to help implement the least-recently-used algorithm that creates free space when needed). The memory location of the 8KB page in the buffer pool.

Efficiency 54

Efficiency Servers Database Cache 54

Brendan Gregg

JUNE 30, 2018

sounds like a homework exercise of purely academic value. Networks, PCIe busses, CPU interconnects, memory busses, and storage devices (both throughput and IOPS), all have fixed limits. If the benchmark reported 20k ops/sec, you should ask: why not 40k ops/sec? This is really asking "what's the limiter?" What's the limiter?"

Benchmarking 54

Benchmarking Latency Cache Network 54

All Things Distributed

OCTOBER 2, 2017

Adaptive Capacity –DynamoDB intelligently adapts to your table's unique storage needs, by scaling your table storage up by horizontally partitioning them across many servers, or down with Time To Live (TTL) that deletes items that you marked to expire. Auto Scaling is on by default for all new tables and indexes.

Internet 128

Internet Internet AWS Performance 128

Brendan Gregg

JUNE 29, 2018

sounds like a homework exercise of purely academic value. Networks, PCIe busses, CPU interconnects, memory busses, and storage devices (both throughput and IOPS), all have fixed limits. If the benchmark reported 20k ops/sec, you should ask: why not 40k ops/sec? This is really asking "what's the limiter?" What's the limiter?"

Benchmarking 40

Benchmarking Latency Cache Network 40

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. In general a good way to avoid customer visible issues caused by control plane failure modes is to pre-allocate identity, network, compute and storage/database structures wherever possible.

Latency 52

Latency Engineering Systems Hardware 52

Adrian Cockcroft

NOVEMBER 11, 2019

There are many possible failure modes, and each exercises a different aspect of resilience. In general a good way to avoid customer visible issues caused by control plane failure modes is to pre-allocate identity, network, compute and storage/database structures wherever possible.

Latency 53

Latency Engineering Systems Hardware 53

HammerDB

JANUARY 5, 2019

Some opinions claim that “Benchmarks are meaningless”, “benchmarks are irrelevant” or “benchmarks are nothing like your real applications” However for others “Benchmarks matter,” as they “account for the processing architecture and speed, memory, storage subsystems and the database engine.”

Benchmarking 40

Benchmarking Database Social Media Scalability 40

Tasktop

JUNE 25, 2020

Replacing one-off paper-and-pen value stream mapping exercises, Tasktop Viz continuously measures the flow of work through the configured value streams. Flow Fabric feeds a schemaless immutable storage of digital artifacts, across disciplines and functions. Tasktop Viz Flow Metrics Dashboard.

Metrics 52

Metrics Education Innovation Software 52

The Netflix TechBlog

MARCH 6, 2019

Mounting object storage in Netflix’s media processing platform By Barak Alon (on behalf of Netflix’s Media Cloud Engineering team) MezzFS (short for “Mezzanine File System”) is a tool we’ve developed at Netflix that mounts cloud objects as local files via FUSE. Our object storage service splits objects into many parts and stores them in S3.

Media 214

Media Storage Processing Cache 214

The Morning Paper

APRIL 16, 2019

During the ten week course, students implement four different assignments: an exactly-once RPC protocol; a primary-backup system; Paxos; and a scalable, transactional key-value storage system. Consider the lab exercise to implement Paxos. 175 undergraduates a year currently go through this course. So DSLabs also uses model checking.

Systems 43

Systems Efficiency Testing Strategy 43

All Things Distributed

NOVEMBER 15, 2010

Configuring kernel execution is not a trivial exercise and requires GPU device specific knowledge. Driving Storage Costs Down for AWS Customers. Expanding the Cloud - The AWS Storage Gateway. At werner.ly he posts material that doesnt belong on this blog or on twitter. Syndication. Subscribe to this weblogs. or rss feed.

AWS 136

AWS Latency Programming Architecture 136

Alex Russell

SEPTEMBER 20, 2020

Not draining other's bank accounts may be something of an exercise to the reader. ??. webviews can plumb arbitrary native capabilities into web content they host, providing isolated-storage with expanded powers. Skipping over the web and its success is a curious blind-spot for such thoughtful tech observers.

Hardware 64

Hardware Mobile Programming Java 64

Alex Russell

AUGUST 30, 2021

Large projects like browser engines also exercise governance through a hierarchy of "OWNER bits," which explicitly name engineers empowered to permit changes in a section of the codebase. Project owners are territorial, fiercely guarding the integrity of their codebases.

Engineering 98

Engineering Open Source Website Operating System 98