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Saturday, August 1, 2020 | History

2 edition of Optimal primary-backup protocols found in the catalog.

Optimal primary-backup protocols

Optimal primary-backup protocols

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  • 27 Currently reading

Published by Dept. of Computer Science, Cornell University, National Aeronautics and Space Administration, National Technical Information Service, distributor in Ithaca, N.Y, [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Distributed artificial intelligence.,
  • Fault-tolerant computing.,
  • Computer systems design.,
  • Distributed processing.,
  • Fault tolerance.,
  • Protocol (Computers),
  • Reliability.,
  • System failures.

  • Edition Notes

    Other titlesOptimal primary backup protocols.
    StatementNavin Budhiraja ... [et al.].
    Series[NASA contractor report] -- NASA CR-190673.
    ContributionsBudhiraja, Navin., Cornell University. Dept. of Computer Science., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v. (unpaged)
    ID Numbers
    Open LibraryOL18263202M

    It is important to note, however, that PCL reconstruction may not consistently correct abnormal patellofemoral contact pressures or altered knee kinematics. 19 This may be related, at least in part, to difficulties with anatomic tunnel placement. To date, there have been no long-term studies providing conclusive proof that operative intervention decreases the risks of long-term degenerative. Jan 26,  · Book Title. Cisco IOS Multiprotocol Label Switching Configuration Guide, Release SR. Chapter Title. MPLS Traffic Engineering (TE) - Autotunnel Primary and Backup. PDF - Complete Book ( MB) PDF - This Chapter ( KB) View with Adobe Reader on a variety of devices.

    Primary-backup and multi-primary replication. Many classical approaches to replication are based on a primary-backup model where one device or process has unilateral control over one or more other processes or devices. For example, the primary might perform some computation, streaming a log of updates to a backup (standby) process, which can. But what level of compression I have to set for the "primary" backup job? "Dedupe-friendly" --> We lose some disk space on local proxy storage because we won't have on optimal compression level or Data Domain Backup Copy compression settings.

    The 3 labs differ in the degree of fault tolerance and performance they provide for the key/value service: Lab 2 uses a primary/backup replication for the key/value database, assisted by a view service that decides which machines are alive. Optical mesh networks refer to transport networks that are built directly off the mesh-like fiber infrastructure deployed in metropolitan, regional, national, or international (e.g., trans-oceanic) areas by deploying optical transport equipment that are capable of switching traffic (at the wavelength or sub-wavelength level) from an incoming fiber to an outgoing fiber.


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Optimal primary-backup protocols Download PDF EPUB FB2

Optimal Primary-Backup Protocols Navin Budhiraja*, Keith Marzullo*, Fred B. Schneider**, Sam Toueg*** Department of Computer Science, Cornell University, Ithaca NYUSA Abstract. We give primary-backup protocols for various models of fail- ure.

These protocols are optimal with respect to. Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

Jun 04,  · Abstract. We give primary-backup protocols for various models of failure. These protocols are optimal with respect to degree of replication, failover time, and response time to client bextselfreset.com by: CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda).

We give primary--backup protocols for various models of failure. These protocols are optimal with respect to degree of replication, failover time, and response time to client requests. 1 Introduction One way to implement a fault-tolerant service is to employ multiple sites that fail independently.

We present a precise specification of the primary-backup approach. Then, for a variety of different failure models we prove lower bounds on the degree of replication, failover time, and worst-case blocking time for client requests.

Finally, we outline primary-backup protocols and indicate which of Cited by: Tradeoffs in Implementing Primary-Backup Protocols. Proceedings of the Seventh IEEE Symposium on Parallel and Distributed Processing, Octoberpp. (with N. Budhiraja). Deriving optimal checkpoint protocols for distributed shared memory architectures.

For example, some primary—backup protocols use more servers than the number of failures to be tolerated [LGG+91].

We are now able to explain this phenomenon by showing that the number of servers needed depends also on the failure model. With both active replication and the primary-backup approach, the goal is to provide a client with.

We give primary-backup protocols for various models of failure. These protocols are optimal with respect to degree of replication, failover time, and response time to client requests.

View Show. This volume presents the proceedings of the Sixth Workshop on Distributed Algorithms (WDAG 92), held in Haifa, Israel, NovemberWDAG provides a forum for researchers and other parties interested in distributedalgorithms and their applications.

The aim is to present recent. Rules 1. Primary in view i+1 must have been backup or primary in view i 2. Primary must wait for backup to accept/execute each op before doing op and replying to client 3.

The paper presents a primary-backup protocol to manage replicated in-memory database systems (IMDBs). The protocol exploits two features of IMDBs: coarse-grain concurrency control and deferred. Active Replication vs.

Primary-Backup In active-replication (state machine approach from Ch.7) o Client sends request to all servers o All servers execute all requests o Failure of any server is masked In primary-backup systems o Client sends request only to one designated primary server o Only the primary server executes the request o If the primary fails, one of the backup servers.

Dec 12,  · Book Title. MPLS Traffic Engineering Path Link and Node Protection Configuration Guide referred to as an LSR, runs standard IP control protocols (that is, routing protocols, RSVP, and so forth) to determine where to forward packets.

Benefits of MPLS Traffic Engineering Protection router--A network layer device that uses one or more. Primary Protection Below is the power system protection scheme which is designed to protect the power system parts and components.

As shown in below fig, each line associated with over current relay that protect the lines from faults. So, if a fault happens on any line, it. Comparison between primary-backup and active repli-cation Active replication uses more CPU resources (as all replicas handle the in-vocation).

In case of a crash (of the primary), the latency for the client between the invocation and the reception of the response is longer with primary-backup. The primary/backup relation can be implemented two ways: one way is to prepend AS twice (instead of the normal one time) in the announcement to the backup provider, and just once to the primary provider.

In this way, the path through the backup provider is intended to be longer than the path through the primary provider in terms of AS hops. The possibility of performing an optimal exploitation of the network resources throughout the joint use of the IGP and MPLS protocols provides a flexible tool for the ISP (Internet Service Provider) networks traffic engineers.

The efficiency of the proposed approach is validated by a wide experimentation performed on synthetic and real networks. This volume contains the papers presented. at the Third IFIP International Working Conference on Dependable Computing for Critical Applications, sponsored by IFIP Working Group and held in Mondello (Sicily), Italy on SeptemberSystem developers increasingly apply.

Primary & Backup Protection Primary Protection. The main protection or primary protection is the first line protection which provides quick-acting and selective clearing of a fault within the boundary of the circuit section or element it protects.

The main protection is provided in each section of an electrical installation. Book Description If a network is not secure, how valuable is it. Introduction to Computer Networks and Cybersecurity takes an integrated approach to networking and cybersecurity, highlighting the interconnections so that you quickly understand the complex design issues in modern networks.

The primary protection is the first line of defence and is responsible to protect all the power system elements from all the types of faults. The backup protection comes .Server Backup Types Three primary types of backups exist: full, incremental, and differential. Full backups include the OS, applications, and data stored on the server (i.e., an image of every piece of data stored on the server hard drives).

The advantage of a full backup is that it is easy to restore the entire server to the state (e.g., configuration, patch level, data) it was in when.Feb 07,  · in our company we have two sites and each of them has a windows domain controller, site 1 has the primary DC.

my boss wants to backup the sysvol, what's the best way? should we backup only that folder or the entire server? and what tool should we use?/5(36).