Group:
testing
Topic:
implementing distributed systems and applications
Topic:
reliability of distributed systems
Topic:
software maintenance by patching
Topic:
testing by voting or N-version
Topic:
updating information in a distributed system
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Subtopic: non-recurring bugs 
| Quote: bugs are discovered when they are repetitious; problem of non-recurring bugs such as race conditions [»cbb_1980, OK]
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Subtopic: logs
| Quote: Grapevine logs a week's activity at each server; useful for reconstructing failures [»schrMD2_1984]
| | Quote: debug Grapevine by observing the logs of multiple servers [»schrMD2_1984]
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Subtopic: reproducing remote errors
| Quote: run test cases from remote systems on the local site to help identify the error; e.g., a misconfiguration or old version [»nowiDA8_1978]
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Subtopic: reversible, distributed execution
| Quote: added reversible execution across multiple processes to Simula; particularly useful for debugging [»lafoF3_1984]
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Subtopic: message handler
| Quote: since the message handler sees all messages, messages are easily traced for simulation and checking [»katzL_1981]
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Subtopic: centralized server
| Quote: run model calculations on a central machine to give its author control over program maintenance [»gammR_1982]
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Subtopic: telephone network
| Quote: used two years of outage records to study failures of the US Public Switched Telephone Network [»kuhnDR4_1997]
| | Quote: overloads of the telephone network caused almost half of the outage minutes; human error and acts of nature where other major causes [»kuhnDR4_1997]
| | Quote: human intervention was able to correct many failures of the telephone network in under one hour [»kuhnDR4_1997]
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Subtopic: telephone software
| Quote: half of the software in telephone switches concerns error detection and correction; this may explain the low outage rate due to software [»kuhnDR4_1997]
| | Quote: software errors caused less downtime of the telephone network, 2%, than any other source of failure except vandalism
| | Quote: restarting a telephone switch temporarily fixed a significant number of software-caused outages
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Subtopic: simulation
| Quote: robot simulation particularly useful for testing synchronization and signaling among multiple devices [»craiJJ4_1987]
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Subtopic: automate remote maintenance
| Quote: need a full system for remote software maintenance; exchanging tapes results in out-of-date versions at remote sites [»nowiDA8_1978]
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Subtopic: programmable controllers
Quote: with programmable controllers, can change reactors dynamically
[»instrumentcontrol]
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Related Topics
Group: testing (18 topics, 557 quotes)
Topic: implementing distributed systems and applications (41 items)
Topic: reliability of distributed systems (35 items)
Topic: software maintenance by patching (27 items)
Topic: testing by voting or N-version (10 items)
Topic: updating information in a distributed system
(50 items)
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