Log management and observability rely heavily on logs for system monitoring and troubleshooting. Implementing scientific local log management strategies ensures complete historical records and efficient log analysis. However, commonly used tools can encounter challenges. Specifically, the copy truncate mode for log rotation can lead to significant problems such as duplicate log collection and content loss. The process of copying and then truncating logs can result in data being written neither in the old nor the new log, exacerbating these issues. A better approach is to adopt the create mode for log rotation to enhance accuracy and reliability.
Log rotation using copy truncate mode can cause log loss or duplicate collection because of non-atomic operations and new file creation. The copy action introduces risks of misidentification by collectors.
Using the copy truncate method generates new files that can be mistaken for fresh content, and there are moments when logs written are lost between copy and truncate operations.
File truncation alters file size and can change header contents, leading to misjudgment by collectors, which can result in duplicate log collection or loss of log content.
To avoid issues associated with log rotation, it's suggested to utilize the create mode rather than the copy truncate mode, simplifying log collection accuracy.
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