Research on Elasticsearch with express+react

elastic search: indexing takes longer time, support json parsing

indri: better performance than elastic search, nearly twice the speed, support xml instead of json

for a time-based dynamic document, which needs to change in a time log, updating all the index

indri seems to have better performance

./configure blabla

make

make install

https://lemur.sourceforge.io/indri/

cd indri

cd bin

make a index.xml for parameter parsing

//to specify a the parameter of a index https://sourceforge.net/p/lemur/wiki/IndriBuildIndex%20Parameters/

./IndriBuildIndex blabla.xml

https://sourceforge.net/p/lemur/wiki/IndriRunQuery/ ./IndriRunQuery

indexing method-

1. build inverted index table:

https://www.quora.com/What-is-inverted-index-It-is-a-well-known-fact-that-you-need-to-build-indexes-to-implement-efficient-searches-What-is-the-difference-between-index-and-inverted-index-and-how-does-one-build-inverted-index

build index:

https://www.cs.cmu.edu/~lemur/3.1/indexing.html

detailed explanation:

http://www.shuang0420.com/2016/10/14/Search%20Engines%E7%AC%94%E8%AE%B0%20-%20Index/

parsing source code

https://sourceforge.net/p/lemur/code/HEAD/tree/indri/tags/release-5.9/src/Parameters.cpp#l47

build index source code

https://sourceforge.net/p/lemur/code/HEAD/tree/indri/tags/release-5.9/buildindex/IndriBuildIndex.cpp#l1078