09-Monitoring - CSE 265 System and Network Administration If you aren't measuring it you aren't managing it Service Monitoring Syslog and Log files

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Spring 2008 CSE 265: System and Network Administration ©2004-2008 Brian D. Davison CSE 265: CSE 265: System and Network Administration System and Network Administration Service Monitoring Historical data Real-time monitoring Alerting Active monitoring systems End-to-end tests Application response time monitoring Syslog and Log files Logging policies – what do you do with logs? Linux log files Logrotate: Manage log files Syslog: system event logger Condensing log files If you aren't measuring it, you aren't managing it.
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Spring 2008 CSE 265: System and Network Administration ©2004-2008 Brian D. Davison Motivation for monitoring Motivation for monitoring Rapidly detect and fix problems Identify the source of problems Predict and avoid future problems Provide data on SA's achievements
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Spring 2008 CSE 265: System and Network Administration ©2004-2008 Brian D. Davison Historical data Historical data Historical availability record long-term uptime statistics show improvements (99.99% uptime vs 99.9%) Utilization data useful for capacity planning Process Poll systems at regular intervals Collected, often graphed Example: network status https://spot.cc.lehigh.edu/public/mrtg/internett.html
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Spring 2008 CSE 265: System and Network Administration ©2004-2008 Brian D. Davison Real-time monitoring Real-time monitoring Alert SA immediately about a failure Want to notice outage before customer does maintain reputation minimize downtime Two components Monitoring (polling) systems to check status, watching error messages, checking subsystems Alerting – recognize problems and notify SAs
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Spring 2008 CSE 265: System and Network Administration ©2004-2008 Brian D. Davison Monitoring Monitoring Want to monitor everything that can indicate a problem Availability monitoring Host/network/application failures Capacity monitoring Approaching or past overload
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Spring 2008 CSE 265: System and Network Administration ©2004-2008 Brian D. Davison Alerting Alerting Monitoring useless without alerting system Should not depend on system being monitored
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This note was uploaded on 08/06/2008 for the course CSE 265 taught by Professor Davison during the Spring '08 term at Lehigh University .

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09-Monitoring - CSE 265 System and Network Administration If you aren't measuring it you aren't managing it Service Monitoring Syslog and Log files

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