Two Phase commit protocol:
Generals paradox:
In order to comprehend that the two-phase commit protocol solves some problem it is useful to analyze this generals paradox. There are two generals on campaign. They have an objective (a hill) that they desire to capture. If they concurrently march on the objective they are assured of success. If merely one marches he will be annihilated.
The generals are encamped merely a short distance apart however due to technical difficulties they can communicate merely via runners. These messengers have a flaw each time they venture out of camp they stand some chance of getting lost (they aren’t very smart.)
The problem is to discover some protocol that allows the generals to march together even though some messengers get lost. There is a plain proof that- no fixed length protocol exists: Let P is the express such protocol. Suppose the last messenger in P gets lost. Afterwards either this messenger is useless or one of the generals doesn't get a needed message. By the minimality of P the last message isn’t useless so one of the general doesn't march if the last message is lost. This contradiction establishes that no such protocol P exists.
The generals paradox (which as you now see isn’t a paradox) has strong analogies to problems faced by a data recovery management when doing commit processing. Imagine that one of the generals is a computer in Tokyo as well as that the other general is a cash-dispensing terminal in Fuessen Germany. The goal is to-
• Open a cash drawer with a million marks in it (at Fuessen) in addition to• Debit the appropriate account in the non-volatile storage of the Tokyo computer.
If merely one thing happens either the Germans or the Japanese will destroy the general that didn’t ‘march’.
Latest technology based Operating System Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Operating System help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Operating System, project ideas and tutorials. We provide email based Operating System help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Operating System. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Operating System Homework help and assignment help services. They use their experience, as they have solved thousands of the Operating System assignments, which may help you to solve your complex issues of Operating System. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
the major functions of it is to separate the synchronizing pulses (shortly sync, pulses) from the composite video signal. class c amplifier is used for that aim.
Basic structure of an atom and atomic models tutorial all along with the key concepts of Atomic Structure, Charge Quantization, Mass Spectra, Isotopes, Atomic models, Bohr's model of an atom, Hydrogen Spectra
tutorsglobe.com vegetative propagation by stem assignment help-homework help by online natural methods of vegetative propagation tutors
Hone your writing skills and secure A++ grades with affordable Business Management Essay Writing Assignment Help.
Historical Viewpoint tutorial all along with the key concepts of Histories of Cells Discoveries, Bridge between Life and Non-life, Protoplasmic Constituents and The Neuron Theory
Biosynthesis tutorial all along with the key concepts of Biosynthesis of Some Plant Metabolites, Chlorophyll biosynthesis, Carotenoid biosynthesis, Other natural products of pharmaceutical importance, Antibiotics
Theory and lecture notes of Institutions and the Natural Rate all along with the key concepts of institutions and the natural rate, homework help, assignment help. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Institutions and the Natural Rate.
Light absorption-fate of the excited state tutorial all along with the key concepts of The Franck-Condon Principle, catalogue of several important photo physical processes, Photo-excitation by Stimulated Absorption, Vibrational Relaxation, Fluorescence
tutorsglobe.com carbohydrate as a source of energy assignment help-homework help by online carbohydrate metabolism tutors
Classifications of Amino Acids tutorial all along with the key concepts of Criteria for Classification of Amino Acids, Classification Based on Structure, Categorization Based on Polarity, Categorization Based on Nutritional Requirements
Vegetative Structure of Seed Plants-Root tutorial all along with the key concepts of Root Growth, Types of roots, Taproot system, Fibrous root system, Specialized Variations of Roots and Root architecture
defects occur antenna stage and tuner, video if stage, AGC Stage, Video Amplifier, picture tube circuit, horizontal sweep section, vertical sweep section, magnets used in yoke section, sync. Separator stage, differentiator circuit, integrator circuit, power supply, sound section.
Proteins and Nucleic Acids tutorial all along with the key concepts of Introduction to protein, Introduction to Nucleic Acids, Protein and Nucleic Acid Relationship, Protein-Nucleic Acid Interactions
Herbs-Shrubs-Trees tutorial all along with the key concepts of Herbaceous Monocotyledonous Stem, Herbaceous Dicotyledonous Stem, Ephemerals, Annual Plants, Biennial Plants and Perennial Plants
tutorsglobe.com properties and functions of immunoglobulins assignment help-homework help by online structure and characteristics of antibodies tutors
1939965
Questions Asked
3689
Tutors
1485997
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!