In TDengine database, there is a data compression configuration in /etc/taos/taos.cfg
# enable/disable compression
# comp 2
the default option is 2, so how many options do we have for comp, what is the difference for each option?
how many options do we have for data compression in TDengine database?
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TDengine provides three compression options: no compression, one-stage compression and two-stage compression, corresponding to comp values of 0, 1 and 2 respectively.
One-stage compression is carried out according to the type of data. Compression algorithms include delta-delta coding, simple 8B method, zig-zag coding, LZ4 and other algorithms.
Two-stage compression is based on one-stage compression and compressed by general compression algorithm, which has higher compression ratio.