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Efficient Fork-Linearizable Access to Untrusted Shared Memory Presented by: Alex Shraer (Technion) Joint work with: Christian Cachin IBM Zurich Abhi Shelat
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Efficient Fork-Linearizable Access to Untrusted Shared Memory ... otherwise the run is not fork-linearizable, which can be detected by the clients ...
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if (k) return true. return false. A story of improving efficiency (raises many questions) ... (validateAdd = validateRemove = true) Step 2a: weakest ...
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If all of those criteria are fulfilled then our snapshot algorithm are linearizable ... gives up to 20 % better performance in common practical scenarios ...
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On Beyond Registers: Wait-Free Readable Objects Maurice Herlihy Brown University
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An assembly algorithm (plan) is constructed by splitting the target into smaller ... Relax some constraints to come up with candidate algorithms (assembly trees) ...
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CPSC 668 Distributed Algorithms and Systems Fall 2006 Prof. Jennifer Welch Distributed Shared Memory A model for inter-process communication Provides illusion of ...
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Elements of Tp*M, called one-forms, are linear maps. Background ... If a control system S is DFL with precompensator P, there exists p integers ri such that ...
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Velocity Control of a Wheeled Inverted Pendulum by Partial Feedback Linearization ... Dynamic stabilization needed for vehicle operation. ...
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Thread Quantification for Concurrent Shape Analysis Josh Berdine MSR Cambridge Tal Lev-Ami Tel Aviv University Roman Manevich Tel Aviv University
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A model for inter-process communication ... Ex: write0(X,3) ack0(X) read1(X) return1(X,3) CPSC 668. Set 16: Distributed Shared Memory ...
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Replication Improves reliability Improves availability (What good is a reliable system if it is not available?) Replication must be transparent and create the ...
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Develop computationally efficient algorithms for ... Canonical transformation of state equations using linear and ... polytopic approximation ...
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Consistency and Replication Distributed Software Systems
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Title: Statistics Courses beyond Stats 242.3 Author: laverty Last modified by: laverty Created Date: 3/16/2005 5:16:15 PM Document presentation format
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Clients are not aware of multiple physical copies (replicas) of ... Updates in Bayou. About Bayou. Consistency guarantees. Merging of updates. Dependency checks ...
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Sequential consistency ... Causal consistency ... To implement this consistency model, the editor must invalidate the cached copy, ...
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Title: Uniqueness numerical analysis for boundary value problems involving classical and secodn gradient models for cohesive materials Author: Ren Chambon
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LAN. LAN 2003 Andy Huang. User preferences: Explicit: ... LAN. Dlib. Bricks 2003 Andy Huang. Quorum algorithm 2003 Andy Huang. Algorithm: Wavering reads ...
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Linear Regression Hypothesis testing and Estimation
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Fault Tolerance in Distributed Systems
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On Beyond Registers: Wait-Free Readable Objects. Maurice Herlihy. Brown University. 10/4/09 ... Readable! 10/4/09. 18. Question ...
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Sun SPARC. 80X86, Pentium. An example CAS usage: Treiber's ... You will test your algorithm on an 8-core Xeon machine, running Gentoo Linux (kernel 2.6.22) ...
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Locks: Semaphores, spinning, disabling interrupts etc. ... Each thread performs 20000 operations, whereof the first total 50-10000 ...
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Pull-based Approaches. Proxy is entirely responsible for maintaining consistency ... Based on adaptively controlling the state space. Shorter leases during heavy load ...
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Consistency and Replication Reasons for Replication Reliability Performance Scaling with respect to size of geographic area ... (i.e.,local cache of http browsers) ...
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FAA's major modernization project, the Advanced Automation ... protocols Pathfinder caused repeated resets, nearly doomed the mission. Unexpected interactions ...
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LS fit to linear tire model. NLS fit ... tm from steering geometry, model tp as ... LS fit to line. NLS fit to Dugoff. Compare fit errors to tell us if in ...
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A program could have high logical complexity initially. ... P3: Budgets are finite: Diversity is not free. ... { strong-typing } { Java-style pointers } ...
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Experiences with Formal Specifications of Fault-Tolerant File Systems ... [Chkliaev, et.al., 00], [Crow, et.al., 98], [Joshi, et.al., 03], [Houston, et.al., 91] ...
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Fault Tolerance in Distributed Systems 05.05.2005 Naim Aksu Agenda Fault Tolerance Basics Fault Tolerance in Distributed Systems Failure Models in Distributed Systems ...
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Title: Figure 15.1 A distributed multimedia system Author: George Coulouris Last modified by: czhang Created Date: 6/18/2000 9:59:47 PM Document presentation format
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x.write1(0), x.write2(1), x.ack1, x.read1, x.ack2, x.ret1(0), x.read2, x.ret2(1) ... x.write1(1), y.write2(1), y.ack2, x.ack1, y.read1, x.read2, x.ret1(), y.ret2 ...
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Locks: Semaphores, spinning, disabling interrupts etc. ... and E. Hillel, 'Built-in coloring for highly-concurrent doubly linked lists', DISC 2006 ...
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Problem: Because of concurrency (pre-emption in particular), same pointer value ... Medium Pre-emption. High Pre-emption. Conclusions ...
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Blocking, Danger of priority inversion and deadlocks. ... Decrement reference count and retries if link is changed after step 2. 5 August 2005 ...
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(gram-equivalents of amine ends/million grams of polymer) ... Control Objective - achieving the target molecular weight and concentration of amine end groups ...
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Classic distributed systems: focused on ACID semantics (transaction semantics) ... Classic DS style. 11. Partition-Tolerance and Availability. Comment: ...
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This sequence is allowed with a casually-consistent store, but not with ... 2. Before a release is allowed to be performed, all previous reads and writes by ...
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Title: Systems Area: OS and Networking Author: Campus User Last modified by: Scott Shenker Created Date: 2/16/1997 2:02:43 PM Document presentation format
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Example (k=4) X1, X2, X3, X4. Variables in for leading runs 100 R2% Set 1: X4. 67.5 ... Thus if we plot, for each run, Cp vs p and look for Cp close to p 1 then we ...
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Since less than half of the military attacked, the military attack failed... 12 ... Each site now sends the attack plan they've received to the other sites... 19 ...
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BAR Fault Tolerance for Cooperative Services. Amitanand S. Aiyer, et. al. (SOSP 2005) ... Data on BAR-B can be retrieved within the lease period ...
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Can tell which is the case by comparing witness interleaving with implementation trace ... Observations may not get interleaved at the most interesting places ...
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... Links', E.Chan, R.van de Geijn (UTexas), W. Gropp, R.Thakur (Argonne National Lab. ... Guy L. Steele: 'Parallel Programming and. Code Selection in Fortress' ...
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Non-Uniform Memory Access (NUMA) 5 April 2005. IPDPS 2005. 4 ... Performed on NUMA (SGI Origin 2000) architecture, full concurrency. 5 April 2005. IPDPS 2005 ...
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Separate models for the GMT, BST and Xmas & New Year' periods ... The Easter and Xmas-NY periods are indicated by separate fuzzy flags. 13 LDZs ...
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Distributed services manage redundant state across servers to tolerate faults ... the industry consortia of two research centers at Carnegie Mellon: CyLab and the ...
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... process pi uses its DAG to simulate runs of A in the system, i.e., every process ... Ei := {Pi(j)} jk. write(Ei) to register Ri. Ei := Ei U Pi(k) send (k,?) to all ...
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How to construct the sequential executions? How to compare unbounded heaps under ... How to construct the sequential execution? Inspired by Flanagan, SPIN'04 ...
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Termination, heaps, and hardware Byron Cook Microsoft Research Cambridge w/ Satnam Singh, Ashutosh Gupta, and the SLAyer crew
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Join is disjunction 'Too' precise. Yields exponential blow-ups. My solution ... 21. Partially disjunctive abstraction. Join coarser than disjunction. 2 x 8 2. y 8 22 ...
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If the group communication system is view-synchronous, explain what happens to p next. ... Explain the difficulty that this raises concerning invocations upon ...
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Standard techniques disallowed any operations while disconnected. Or disallowed operations by others. But eventual consistency not enough ...
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Title: Distributed systems Principles and Paradigms 6. Consistency and Replication Author: Duc Last modified by: Duc Created Date: 5/17/2006 10:24:15 AM
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