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3 Architecture<br />
to 128 GiB of RAM are advisable. More is unnecessary because <strong>Debian</strong> currently contains<br />
129 GiB of uncompressed source code and it is very unlikely that 100 % of it needs to be held<br />
in RAM.<br />
Additional metadata used for ranking is stored in PostgreSQL but only loaded into memory<br />
by dcs-web on startup, thus the dotted line.<br />
Every component in this architecture, except for PostgreSQL, communicates with each<br />
other using HTTP, which makes deploying different parts of the architecture on different<br />
machines on-demand as easy as changing a hostname in the configuration file.<br />
12
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