deploying websphere for scalability and fault tolerance
System Support for Software Fault Tolerance in Highly Available Database Management Systems
Ngày tải lên :
28/04/2014, 13:32
... memory and on disk 1.3 Existing Approaches to Software Fault Tolerance Current strategies for reducing the impact of software errors on systems fall into two classes: fault prevention and fault tolerance ... Since fault prevention alone is not effective, software fault tolerance techniques are used to detect and mask errors when they occur in the system Like hardware fault tolerance, software fault tolerance ... of outages to 62% By 1989, the second and third largest contributors, operations and hardware, were at fault only 15% and 7% of the time, respectively For Tandem, the trend is not due to worsening...
- 250
- 316
- 0
specifications tolerances and other technical requirements for weighing and measuring devices ppt
Ngày tải lên :
27/06/2014, 18:20
... 20402-0001 Handbook 44 - 2007 Foreword Handbook 44 was first published in 1949, having been preceded by similar handbooks of various designations and in several forms, beginning in 1918 Handbook ... Added “Except for entries of tare,” before “the minimum length “ for clarity Deleted “Except for entries of tare,” for clarity Replaced “display” and “displayed” with “indicate” and “indicated” ... language in amendment form to Conference documents; and (4) practical, realistic, and specific recommendations for both regulations and test methods to provide for proper enforcement if a proposal...
- 344
- 3.6K
- 0
Software Fault Tolerance Techniques and Implementation phần 1 potx
Ngày tải lên :
09/08/2014, 12:23
... out of the requirements Fault removal is imperfect, so fault forecasting and fault tolerance are needed 1.3.3 Fault/ Failure Forecasting Fault forecasting, or failure forecasting, includes dependability ... prevent fault introduction and occurrence; • Fault removal: to detect the existence of faults and eliminate them; • Fault/ failure forecasting: to estimate the presence of faults and the occurrence and ... (fault avoidance and fault tolerance) , and (2) those that contribute to validation of the software after it is developed (fault removal and fault forecasting) Briefly, the techniques are: • Fault...
- 35
- 238
- 0
Software Fault Tolerance Techniques and Implementation phần 2 pot
Ngày tải lên :
09/08/2014, 12:23
... diversity for fault tolerance Team-Fly® Structuring Redundancy for Software Fault Tolerance % purposesdata and temporal diversity To assist in developing and evaluating software fault tolerance ... combination of techniques from four risk mitigation areas: fault avoidance, fault removal, fault forecasting, and fault tolerance Unfortunately, there is no single combination of these techniques ... Redundancy for Software Fault Tolerance "# • They provide well-defined interfaces for the definition and imple- mentation of fault tolerance schemes • They consist, in general, of three parts of a fault- tolerant...
- 35
- 424
- 0
Software Fault Tolerance Techniques and Implementation phần 3 ppt
Ngày tải lên :
09/08/2014, 12:23
... A., and T Anderson, Fault Tolerance: Principles and Practice, New York: Springer-Verlag, 2nd ed., 1990 [61] Duncan, R V., Jr., and L L Pullum, Object-Oriented Executives and Components for Fault ... provides a basis for understanding the space and time requirements of, and possible trade-offs between, the software fault tolerance techniques being considered for use Software fault tolerance also ... Cost-Effective and Flexible Scheme for Software Fault Tolerance, Univ of Newcastle upon Tyne, Tech Rep No 372, 1992 [65] Xu, J., A Bondavalli, and F DiGiandomenico, Software Fault Tolerance: Dynamic...
- 35
- 298
- 0
Software Fault Tolerance Techniques and Implementation phần 4 pdf
Ngày tải lên :
09/08/2014, 12:23
... 92] summarizes the key fault tolerance activities and issues for this phase • Description of system behavior in presence of faults: Fault assumptions (faults considered, faults discarded); • System ... Concept, in M R Lyu (ed.), Software Fault Tolerance, New York: John Wiley and Sons, 1995, pp 121 [21] Anderson, T., and J Knight, A Framework for Software Fault Tolerance in RealTime Systems, ... Software Fault Tolerance Techniques and Implementation Table 4.2 Software Fault Tolerance Dependability Investigations Comment References Combined analysis of hardware and software fault tolerance...
- 35
- 357
- 0
Software Fault Tolerance Techniques and Implementation phần 5 pdf
Ngày tải lên :
09/08/2014, 12:23
... illustrations and discussion of architectures for NVP tolerating one fault and that for tolerating two consecutive faults 4.2.3.2 Performance There have been numerous investigations into the performance ... invocations Laprie and colleagues [19] provide illustrations and discussion of architectures for NSCP tolerating one fault and that for tolerating two consecutive faults 4.4.3.2 Performance There ... non -fault- tolerant software) includes additional memory for the second through the nth variants, executive, and DM; additional execution time for the executive and the DM; and 128 Software Fault...
- 35
- 340
- 0
Software Fault Tolerance Techniques and Implementation phần 6 ppt
Ngày tải lên :
09/08/2014, 12:23
... [16] Anderson, T., and P A Lee, Software Fault Tolerance, in Fault Tolerance: Principles and Practice, Englewood Cliffs, NJ: Prentice-Hall, 1981, pp 249291 [17] Randell, B., Fault Tolerance and ... variants, executive, and DMs (ATs and voting type); additional execution time for the executive and the DMs; and synchronization overhead 170 Software Fault Tolerance Techniques and Implementation ... software fault tolerance techniques described The structure of the table and the entries for the RcB, NVP, and NSCP techniques were developed by Laprie and colleagues [19] Entries for the DRB, CRB, and...
- 35
- 390
- 0
Software Fault Tolerance Techniques and Implementation phần 7 docx
Ngày tải lên :
09/08/2014, 12:23
... Software Fault Tolerance Techniques and Implementation The NCP technique uses a decision mechanism (DM) (see Section 7.1) and forward recovery (see Section 1.4.2) to accomplish fault tolerance ... Section 7.1) and both forward and backward recovery (see Sections 1.4.1 and 1.4.2) to accomplish fault tolerance The technique uses one or more DRA (see Sections 2.3.1 through 2.3.3) and at least ... software fault tolerance techniques depends on the performance of the re-expression algorithm used Several ways to perform data re-expression and insight on actual reexpression algorithms and their...
- 35
- 329
- 0
Software Fault Tolerance Techniques and Implementation phần 8 ppsx
Ngày tải lên :
09/08/2014, 12:23
... Redundancy for the Detection and Tolerance of Software Faults, Proceedings: Interface 90, East Lansing, MI, 1990 [13] Anderson, T., and P A Lee, Software Fault Tolerance, in Fault Tolerance: ... selfprotective and self-checking components, and is derived from an approach to fault tolerance in which system goals are made explicit It was evolved from the efforts of Taylor and Black [9] and Bastani and ... Other Software Fault Tolerance Techniques $! Table 6.3 Some of the Other Software Fault Tolerance Techniques Technique Name Description Algorithmic fault tolerance Algorithmic fault tolerance describes...
- 35
- 283
- 0
Software Fault Tolerance Techniques and Implementation phần 9 pptx
Ngày tải lên :
09/08/2014, 12:23
... t/(n − 1)-Diagnosability and Its Applications to Fault Tolerance, Proceedings: FTCS-21, Montreal, Canada, 1991, pp 496503 [33] Xu, J., and B Randell, Software Fault Tolerance: t/(n − 1)-Variant ... P -N., and J Blankenship, Correspondent Computing for Software Implementation Fault Tolerance, Proceedings: Symposium on Applied Computing, 1990, pp 1219 [31] Wu, J., Software Fault Tolerance ... voting and 2-out-of-n is the lower bound [33] For m = 2, consensus voting is the same as majority voting Consensus voting and CRB-based systems were found [27] to perform better, and more uniformly,...
- 35
- 279
- 0
Software Fault Tolerance Techniques and Implementation phần 10 pdf
Ngày tải lên :
09/08/2014, 12:23
... background, and design and programming guidelines and techniques for software fault tolerance The next three chapters described design diverse, data diverse, and other software fault tolerance ... Software Fault- Tolerance, in J Zalewski and W Ehrenberger (eds.), Hardware and Software for Real Time Process Control, Elsevier Science Publishers B.V., NorthHolland, 1989 324 Software Fault Tolerance ... consensus voter and, 294 !!% detection, 22526 dynamic majority voter and, 309 exact majority voter and, 277 fault tolerance techniques and, 22324 median voter and, 282 SCOP and, 260 selection,...
- 43
- 261
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 1 pps
Ngày tải lên :
12/08/2014, 07:22
... 20402-0001 Handbook 44 - 2007 Foreword Handbook 44 was first published in 1949, having been preceded by similar handbooks of various designations and in several forms, beginning in 1918 Handbook ... Added “Except for entries of tare,” before “the minimum length “ for clarity Deleted “Except for entries of tare,” for clarity Replaced “display” and “displayed” with “indicate” and “indicated” ... language in amendment form to Conference documents; and (4) practical, realistic, and specific recommendations for both regulations and test methods to provide for proper enforcement if a proposal...
- 25
- 380
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 3 ppt
Ngày tải lên :
12/08/2014, 07:22
... - Conveyor stringers at the scale and for not less than m (20 ft) before and beyond the scale shall be continuous or securely joined and of sufficient size and so supported as to eliminate relative ... Systems Handbook 44 - 2007 (f) Zero Load Reference Information - When zero load reference information is recorded for a delivery, the information must be based upon zero load tests performed as ... before and immediately after the totalized load (Added 2002) (Amended 2002 and 2004) UR.3.3 Retention of Maintenance, Test, and Analog or Digital Recorder Information - Records of calibration and...
- 30
- 303
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 4 pptx
Ngày tải lên :
12/08/2014, 07:22
... maintenance tolerances shall be as shown in Table Acceptance tolerances shall be one-half the maintenance tolerances Table Maintenance Tolerance for Avoirdupois Weights Maintenance Tolerance Nominal ... shown in Table Acceptance tolerances shall be one-half the maintenance tolerances 2-65 2.23 Weights Handbook 44 - 2007 Table Maintenance Tolerances For Apothecaries' and Troy Weights Nominal Value ... articles for distribution, for purchase, offered or submitted for sale, for distribution, purchase, or in computing any basic charge or payment for services rendered on the basis of weight, and in...
- 29
- 351
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 5 pptx
Ngày tải lên :
12/08/2014, 07:22
... T.2 Tolerance Values - The maintenance and acceptance tolerances for normal and special tests shall be as shown in Table T.2 (Amended 2003) Table T.2 Accuracy Classes and Tolerances for LPG and ... 5.0 % *For 5-gallon and 10-gallon test drafts, the tolerances specified for Accuracy Class 0.5 in the table above not apply For these test drafts, the maintenance tolerances on normal and special ... and special tests for 5-gallon and 10-gallon test drafts are cubic inches and 11 cubic inches, respectively Acceptance tolerances on normal and special tests are cubic inches and 5.5 cubic inches...
- 30
- 470
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 6 pdf
Ngày tải lên :
12/08/2014, 07:22
... weights and measures official T Tolerances T.1 Tolerance Values on Normal Tests and on Special Tests Other Than Low-Flame Tests - Maintenance and acceptance tolerances for normal and special tests for ... and intermediate rates only T Tolerances T.1 Tolerance Values - Maintenance and acceptance tolerances shall be as shown in Table T.1 (Amended 2003) Table T.1 Accuracy Classes and Tolerances for ... exceed 0.6 % for tests performed at the normal and intermediate flow rates, and 1.3 % for tests performed at the minimum flow rate, and each test shall be within the applicable tolerance (Added...
- 30
- 356
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 8 doc
Ngày tải lên :
12/08/2014, 07:22
... milliliters and 10 and 10 25 and 25 50 10 and 50 100 20 and 100 500 100 and 500 1000 200 and 1000 minims minims 60 15 and 60 120 30 and 120 fluid drams fluid drams and and fluid ounces fluid ounces ½ and ... Device (yards) or less and 10 and 11 12 and 13 14 and 15 Over 15 Table Maintenance and Acceptance Tolerances for Fabric-Measuring Devices Maintenance Tolerance Acceptance Tolerance On underOn overOn ... measurement and calculation T Tolerances T.1 Tolerances on Individual Measures - Maintenance and acceptance tolerances in excess and deficiency on an individual measure shall be as shown in Table T.2 Tolerances...
- 26
- 216
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 9 doc
Ngày tải lên :
12/08/2014, 07:22
... Maintenance and acceptance tolerances for timing devices shall be as follows: T.1.1 For Timing Devices Other Than Those Specified in T.1.2 and T.1.3 - The maintenance and acceptance tolerances ... 1996, and 2003) 5-27 5.56.(a) Grain Moisture Meters Handbook 44 - 2007 S.1.2 Grain or Seed Kind and Class Selection and Recording - Provision shall be made for selecting and recording the kind and ... display auxiliary information provided the meter is in the vacant condition and such information is only displayed for1 0 seconds, or less If the information consists of a list of information, the...
- 30
- 243
- 0
Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices Episode 10 doc
Ngày tải lên :
12/08/2014, 07:22
... among weights and measures jurisdictions is the cumulative and regenerative effect of the widespread enforcement of a single standard of design and performance The enforcement effort in each jurisdiction ... Considerations Handbook 44 - 2007 Tolerances for Commercial Equipment 2.1 Acceptance and Maintenance Tolerances - The official tolerances prescribed by a weights and measures jurisdiction for commercial ... authority For example, the following form of promulgation has been used successfully and is recommended for consideration: The specifications, tolerances, and other technical requirements for weighing...
- 30
- 237
- 0