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Problem-solving in high performance computing : a situational awareness approach with Linux / / Igor Ljubuncic
| Problem-solving in high performance computing : a situational awareness approach with Linux / / Igor Ljubuncic |
| Autore | Ljubuncic Igor |
| Edizione | [1st edition] |
| Pubbl/distr/stampa | Waltham, Massachusetts : , : Morgan Kaufmann, , 2015 |
| Descrizione fisica | 1 online resource (322 p.) |
| Disciplina | 005.432 |
| Soggetto topico | High performance computing |
| Soggetto genere / forma | Electronic books. |
| ISBN |
0-12-801064-9
0-12-801019-3 |
| Formato | Materiale a stampa  |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Nota di contenuto |
Identification of a problemIf a tree falls in a forest, and no one hears it fall; Step-by-step identification; Always use simple tools first; Too much knowledge leads to mistakes; Problem definition; Problem that happens now or that may be; Outage size and severity versus business imperative; Known versus unknown; Problem reproduction; Can you isolate the problem?; Sporadic problems need special treatment; Plan how to control the chaos; Letting go is the hardest thing; Cause and effect; Do not get hung up on symptoms; Chicken and egg: what came first?
Do not make environment changes until you understand the nature of the problemIf you make a change, make sure you know what the expected outcome is; Conclusions; References; Chapter 2 - The investigation begins; Isolating the problem; Move from production to test; Rerun the minimal set needed to get results; Ignore biased information; avoid assumptions; Comparison to a healthy system and known references; It is not a bug, it is a feature; Compare expected results to a healthy system; Performance and behavior references are a must; Linear versus nonlinear response to changes One variable at a timeProblems with linear complexity; Nonlinear problems; Response may be delayed or masked; Y to X rather than X to Y; Component search; Conclusions; Chapter 3 - Basic investigation; Profile the system status; Environment monitors; Machine accessibility, responsiveness, and uptime; Local and remote login and management console; The monitor that cried wolf; Read the system messages and logs; Using ps and top; System logs; Process accounting; Examine pattern of command execution; Correlate to problem manifestation; Avoid quick conclusions; Statistics to your aid; Vmstat IostatSystem activity report (SAR); Conclusions; References; Chapter 4 - A deeper look into the system; Working with /proc; Hierarchy; Per-process variables; Kernel data; Process space; Examine kernel tunables; Sys subsystem; Memory management; Filesystem management; Network management; SunRPC; Kernel; Sysctl; Conclusions; References; Chapter 5 - Getting geeky - tracing and debugging applications; Working with strace and ltrace; Strace; Options; What you need to know before using strace; Strace from the standpoint of a system administrator; Strace has friends; Basic usage; Test case 1 Test case 2 |
| Record Nr. | UNISA-996426339603316 |
Ljubuncic Igor
|
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| Waltham, Massachusetts : , : Morgan Kaufmann, , 2015 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. di Salerno | ||
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Problem-solving in high performance computing : a situational awareness approach with Linux / / Igor Ljubuncic
| Problem-solving in high performance computing : a situational awareness approach with Linux / / Igor Ljubuncic |
| Autore | Ljubuncic Igor |
| Edizione | [1st edition] |
| Pubbl/distr/stampa | Waltham, MA : , : Morgan Kaufmann, , [2015] |
| Descrizione fisica | 1 online resource (xxii, 298 pages) : illustrations (some color) |
| Disciplina | 005.432 |
| Collana | Gale eBooks |
| Soggetto topico | High performance computing |
| ISBN |
0-12-801064-9
0-12-801019-3 |
| Formato | Materiale a stampa |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Nota di contenuto |
Identification of a problemIf a tree falls in a forest, and no one hears it fall; Step-by-step identification; Always use simple tools first; Too much knowledge leads to mistakes; Problem definition; Problem that happens now or that may be; Outage size and severity versus business imperative; Known versus unknown; Problem reproduction; Can you isolate the problem?; Sporadic problems need special treatment; Plan how to control the chaos; Letting go is the hardest thing; Cause and effect; Do not get hung up on symptoms; Chicken and egg: what came first?
Do not make environment changes until you understand the nature of the problemIf you make a change, make sure you know what the expected outcome is; Conclusions; References; Chapter 2 - The investigation begins; Isolating the problem; Move from production to test; Rerun the minimal set needed to get results; Ignore biased information; avoid assumptions; Comparison to a healthy system and known references; It is not a bug, it is a feature; Compare expected results to a healthy system; Performance and behavior references are a must; Linear versus nonlinear response to changes One variable at a timeProblems with linear complexity; Nonlinear problems; Response may be delayed or masked; Y to X rather than X to Y; Component search; Conclusions; Chapter 3 - Basic investigation; Profile the system status; Environment monitors; Machine accessibility, responsiveness, and uptime; Local and remote login and management console; The monitor that cried wolf; Read the system messages and logs; Using ps and top; System logs; Process accounting; Examine pattern of command execution; Correlate to problem manifestation; Avoid quick conclusions; Statistics to your aid; Vmstat IostatSystem activity report (SAR); Conclusions; References; Chapter 4 - A deeper look into the system; Working with /proc; Hierarchy; Per-process variables; Kernel data; Process space; Examine kernel tunables; Sys subsystem; Memory management; Filesystem management; Network management; SunRPC; Kernel; Sysctl; Conclusions; References; Chapter 5 - Getting geeky - tracing and debugging applications; Working with strace and ltrace; Strace; Options; What you need to know before using strace; Strace from the standpoint of a system administrator; Strace has friends; Basic usage; Test case 1 Test case 2 |
| Record Nr. | UNINA-9910797571203321 |
|
Ljubuncic Igor
|
||
| Waltham, MA : , : Morgan Kaufmann, , [2015] | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
| ||
Problem-solving in high performance computing : a situational awareness approach with Linux / / Igor Ljubuncic
| Problem-solving in high performance computing : a situational awareness approach with Linux / / Igor Ljubuncic |
| Autore | Ljubuncic Igor |
| Edizione | [1st edition] |
| Pubbl/distr/stampa | Waltham, MA : , : Morgan Kaufmann, , [2015] |
| Descrizione fisica | 1 online resource (xxii, 298 pages) : illustrations (some color) |
| Disciplina | 005.432 |
| Collana | Gale eBooks |
| Soggetto topico | High performance computing |
| ISBN |
0-12-801064-9
0-12-801019-3 |
| Formato | Materiale a stampa |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Nota di contenuto |
Identification of a problemIf a tree falls in a forest, and no one hears it fall; Step-by-step identification; Always use simple tools first; Too much knowledge leads to mistakes; Problem definition; Problem that happens now or that may be; Outage size and severity versus business imperative; Known versus unknown; Problem reproduction; Can you isolate the problem?; Sporadic problems need special treatment; Plan how to control the chaos; Letting go is the hardest thing; Cause and effect; Do not get hung up on symptoms; Chicken and egg: what came first?
Do not make environment changes until you understand the nature of the problemIf you make a change, make sure you know what the expected outcome is; Conclusions; References; Chapter 2 - The investigation begins; Isolating the problem; Move from production to test; Rerun the minimal set needed to get results; Ignore biased information; avoid assumptions; Comparison to a healthy system and known references; It is not a bug, it is a feature; Compare expected results to a healthy system; Performance and behavior references are a must; Linear versus nonlinear response to changes One variable at a timeProblems with linear complexity; Nonlinear problems; Response may be delayed or masked; Y to X rather than X to Y; Component search; Conclusions; Chapter 3 - Basic investigation; Profile the system status; Environment monitors; Machine accessibility, responsiveness, and uptime; Local and remote login and management console; The monitor that cried wolf; Read the system messages and logs; Using ps and top; System logs; Process accounting; Examine pattern of command execution; Correlate to problem manifestation; Avoid quick conclusions; Statistics to your aid; Vmstat IostatSystem activity report (SAR); Conclusions; References; Chapter 4 - A deeper look into the system; Working with /proc; Hierarchy; Per-process variables; Kernel data; Process space; Examine kernel tunables; Sys subsystem; Memory management; Filesystem management; Network management; SunRPC; Kernel; Sysctl; Conclusions; References; Chapter 5 - Getting geeky - tracing and debugging applications; Working with strace and ltrace; Strace; Options; What you need to know before using strace; Strace from the standpoint of a system administrator; Strace has friends; Basic usage; Test case 1 Test case 2 |
| Record Nr. | UNINA-9910808996103321 |
|
Ljubuncic Igor
|
||
| Waltham, MA : , : Morgan Kaufmann, , [2015] | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
| ||
System Administration Ethics : Ten Commandments for Security and Compliance in a Modern Cyber World / / by Igor Ljubuncic, Tom Litterer
| System Administration Ethics : Ten Commandments for Security and Compliance in a Modern Cyber World / / by Igor Ljubuncic, Tom Litterer |
| Autore | Ljubuncic Igor |
| Edizione | [1st ed. 2019.] |
| Pubbl/distr/stampa | Berkeley, CA : , : Apress : , : Imprint : Apress, , 2019 |
| Descrizione fisica | 1 online resource (xxx, 290 pages) : illustrations |
| Disciplina | 174.90904 |
| Soggetto topico |
Data protection
Business ethics Computer security Security Business Ethics Systems and Data Security |
| ISBN | 1-4842-4988-7 |
| Formato | Materiale a stampa |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione | eng |
| Nota di contenuto | Chapter 1: In the Beginning -- Chapter 2: Separate Roles -- Chapter 3: Respect Privacy -- Chapter 4: Do Not Change Data -- Chapter 5: Don't Steal (Intellectual Property) -- Chapter 6: Don't Steal (Computers) -- Chapter 7: Do Not Go Where You Are Not Wanted -- Chapter 8: Follow Procedures and Get Out -- Chapter 9: Communicate Change -- Chapter 10: Do No Harm -- Chapter 11: Break Glass. |
| Record Nr. | UNINA-9910349522703321 |
|
Ljubuncic Igor
|
||
| Berkeley, CA : , : Apress : , : Imprint : Apress, , 2019 | ||
| Materiale a stampa | ||
| Lo trovi qui: Univ. Federico II | ||
| ||