article thumbnail

Designing Instagram

High Scalability

FUN FACT : In this talk , Rodrigo Schmidt, director of engineering at Instagram talks about the different challenges they have faced in scaling the data infrastructure at Instagram. We will use a graph database such as Neo4j to store the information. Sample Queries supported by Graph Database. System Components. API Design.

Design 334
article thumbnail

How It Works (It Just Runs Faster): Non-Volatile Memory SQL Server Tail Of Log Caching on NVDIMM

SQL Server According to Bob

Note: We received feedback that there was some confusion on us calling this functionality “tail of the log caching” because our documentation and prior history has referred to the tail of the log as the portion of the hardened log that has not been backed up. Create / Alter Database … LOG ON. Tail Of Log Caching.

Cache 40
Insiders

Sign Up for our Newsletter

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Trending Sources

article thumbnail

Sponsored Post: pMD, InMemory.Net, Triplebyte, Etleap, Stream, Scalyr

High Scalability

Senior DevOps Engineer : Your engineering work will focus on using your deep knowledge of the web stack including firewalls, web applications, caches and data stores ­ to create innovative infrastructure architectures that are resilient, scalable, and blazingly fast. Please apply here. Apply here. Need excellent people?

article thumbnail

Why Web Developers Choose PHP For Great Website Development?

Official Blog - World Web Technology

Easy to Integrate with Databases PHP has built-in solid support for working with databases, making it perfect for making websites driven by databases. It works with many databases, including well-known ones like Oracle, MySQL, and PostgreSQL. It’s compatible with numerous databases and frameworks.

Website 59
article thumbnail

SQL Server Linux: fsync and Buffered I/O

SQL Server According to Bob

This means data can be stored in file system cache, non-stable media. ) The issue, as described in the link, is that the sync returns the error but may clear the state of the cached pages. The next sync returns ESUCCESS, meaning the the write(s), which were in cache, do not flush to stable media but applications were told they did.

Servers 40
article thumbnail

COLD, WARM, HOT … CLEAN, DIRTY, FREE … What Does All This Mean?

SQL Server According to Bob

If you talk about database pages HOT is a good thing. If the database page is held in the SQL Server Buffer Pool, main ram it is called HOT. If you study a CPU you will find various cache levels (L1, L2, …) In fact, the further away from the CPU the colder the memory is considered. When the database page is.

Cache 40
article thumbnail

SQL 2016 – It Just Runs Faster: DBCC Scales 7x Better

SQL Server According to Bob

The following chart shows the same 1TB database testing. Ryan Stonecipher – Principle SQL Server Software Engineer. Bob Dorr – Principal SQL Server Escalation Engineer. Note: You may need to execute the dbcc a second time so buffer cache is hot, eliminating I/O sub-system variants. or newer release.