archive of online posts; past log
Refers to saved records of past online discussions, such as mailing list archives or message board threads.
If you search the archives, you might find the same question.
log file
In computing contexts, a file that records events or transactions.
We examined the server's log files and identified the cause of the error.
Compound of 過去 (past) and ログ (log), a straightforward modern coinage for digital archives.