Host Device Log Message Suspension via Keystroke Detection
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Solution Overview
Problem
Log message flooding in low-bandwidth management channels like TTY management channels makes it difficult for users to enter configuration change commands to stop the flooding, as the constant stream of log messages obscures the user's typing and existing solutions are either incomplete or overly disruptive, such as rebooting or switching to alternative channels that may not be configured or operational.
Innovation Solution
A host device detects a predetermined combination of keystrokes (e.g., CTRL-C three times within three seconds) to suspend log message transmission for a predetermined time, allowing users to more easily enter configuration change commands to address the flooding issue without disrupting the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If log message transmission continues at full rate, then complete logging information is maintained, but user input becomes obscured and difficult to enter
Solution Approach 1:
The system dynamically adjusts log message transmission by introducing a temporary suspension mechanism. When flooding is detected, the system pauses log transmission to restore visibility for user input, then resumes afterward. This dynamic on/off switching resolves the contradiction between maintaining complete logging information and ensuring user input visibility during critical moments.
Solution Approach 2:
The system implements periodic log transmission by suspending logs during flooding conditions and resuming them after a predetermined time interval. This periodic action pattern allows the system to maintain logging functionality while periodically clearing the display for user input, balancing information completeness with operational ease.
2Ease of operation
If log message transmission is completely stopped, then user interface clarity is improved, but logging functionality is lost
Solution Approach 1:
The system performs preliminary suspension of log transmission before user input is completely obscured. By detecting flooding conditions early and suspending logs proactively, the system prevents information loss while maintaining interface clarity. The predetermined time interval ensures logs resume automatically after serving their protective function.
Solution Approach 2:
Rather than completely stopping logging, the system dynamically suspends and resumes log transmission based on flooding detection. This dynamic approach maintains logging functionality while temporarily pausing output during critical moments, preventing both information loss and interface obscuration.
3Object-generated harmful factors
If traditional methods like rebooting are used to stop log flooding, then flooding is eliminated, but system availability and operational continuity are disrupted
Solution Approach 1:
The system extracts and removes only the harmful log message output during flooding conditions, while keeping the logging mechanism itself intact and the system running. By suspending transmission rather than rebooting, the solution eliminates the harmful flooding effect while preserving system availability and operational continuity.
Solution Approach 2:
The predetermined time interval acts as an intermediary mechanism between log flooding and system response. Instead of immediate drastic measures like rebooting, the system uses a timed suspension period as an intermediate step that resolves flooding while maintaining system availability, then automatically resumes logging to monitor for recurring issues.
4Quantity of substance
If log transmission bandwidth is increased, then more detailed logging is achieved, but the management channel becomes overwhelmed and less responsive to user input
Solution Approach 1:
The system dynamically controls log transmission volume by suspending it during flooding conditions. This dynamic adjustment prevents the management channel from being overwhelmed by excessive log messages, ensuring the channel remains responsive to user commands while still maintaining detailed logging capability when conditions allow.
Solution Approach 2:
By implementing periodic suspension and resumption of log transmission, the system manages log message volume in controlled intervals. This periodic action prevents channel overload by limiting continuous log output, while still achieving detailed logging over time through resumed transmission after flooding periods.
Data Source
AI summary
A host device receives a predetermined combination of keystrokes a predetermined number of times within a predetermined time interval, from a terminal device communicatively connected to the host device. In response to receiving the predetermined combination of keystrokes the predetermined number of times within the predetermined time interval, the host device suspends transmission of log messages from the host device to the terminal device for at least a predetermined length of time.