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what is the .stt file used for in TDengine database ?

under the dataDir some of the file is called .stt like this :

ssn@TDengine:/var/lib/taos/vnode/vnode14$ cd ..
ssn@TDengine:/var/lib/taos/vnode$ ls -ltR | grep -i stt
-rwxrwxrwx 1 root root      4096 Jan 11 10:19 v18f1736ver22.stt
-rwxrwxrwx 1 root root     4096 Jan 11 10:19 v19f1736ver16.stt
-rwxrwxrwx 1 root root      4096 Jan 10 20:00 v16f1736ver18.stt
-rwxrwxrwx 1 root root      4096 Jan 10 20:01 v17f1736ver27.stt

may I know what is it for ?

a specific description for this file ,what is it used ,does it impact the database performance,etc.

Yu Chen
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1 Answers1

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the .sst file is equivalent to the .last file in the TDengine database 2.0

it is used to store the data fragment that smaller than minrows configuration .

Yu Chen
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