A "log" is a file, not a memory or store!
In computing, a log file is a file that records either events that occur in an operating system or other software runs,[1] or messages between different users of a communication software. Logging is the act of keeping a log. In the simplest case, messages are written to a single log file.
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Event logs record events taking place in the execution of a system in order to provide an audit trail that can be used to understand the activity of the system and to diagnose problems.
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Message logs are almost universally plain text files, but IM and VoIP clients (which supports textual chat, e.g. Skype) might save them in HTML files or in a custom format to ease reading and encryption.
https://en.wikipedia.org/wiki/Log_fileEine Logdatei (auch Protokolldatei, Ereignisprotokolldatei; englisch log file) enthält das automatisch geführte Protokoll aller oder bestimmter Aktionen von Prozessen auf einem Computersystem.
https://de.wikipedia.org/wiki/Logdatei