This week’s system design refresher:
ByteByteGo expertise collective
Why PostgreSQL is probably the most beloved database
What’s a proxy?
Twitter structure in 2012
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The diagram exhibits the various use instances by PostgreSQL – one database that features nearly all of the use instances builders want.
OLTP (On-line Transaction Processing)
We are able to use PostgreSQL for CRUD (Create-Learn-Replace-Delete) operations.
OLAP (On-line Analytical Processing)
We are able to use PostgreSQL for analytical processing. PostgreSQL relies on HTAP (Hybrid transactional/analytical processing) structure, so it could deal with each OLTP and OLAP nicely.
FDW (International Knowledge Wrapper)
A FDW is an extension accessible in PostgreSQL that permits us to entry a desk or schema in a single database from one other.
PipelineDB is a PostgreSQL extension for high-performance time-series aggregation, designed to energy real-time reporting and analytics purposes.
PostGIS is a spatial database extender for PostgreSQL object-relational database. It provides help for geographic objects, permitting location queries to be run in SQL.
Timescale extends PostgreSQL for time sequence and analytics. For instance, builders can mix relentless streams of economic and tick knowledge with different enterprise knowledge to construct new apps and uncover distinctive insights.
CitusData scales Postgres by distributing knowledge & queries.
A ahead proxy is a server that sits between a bunch of shopper machines and the web.
A reverse proxy sits between the web and the online servers. It intercepts the requests from shoppers and talks to the online server on behalf of the shoppers.
Each few years, there’s a particular phenomenon that the second after “23:59:59” just isn’t “00:00:00” however “23:59:60”. It’s known as leap second, which might simply trigger time-processing bugs if not dealt with fastidiously.
Will we all the time must deal with leap seconds? It depends upon which era illustration is used. Generally used time representations embody UTC, GMT, TAI, Unix Timestamp, Epoc time, TrueTime, and GPS time.
Since everyone seems to be speaking about Twitter. Let’s take a fast have a look at what Twitter structure appeared like in 2012. This text relies on the tech speak given by a Twitter engineer. I redrew the diagram as the unique diagram is troublesome to learn.