Service Critical Data Collector Log Data Collector Redundancy Redundancy Online Service Standby Service Load Balancer Load Balancer Online Redundancy Common Failure Modes Propagated Failure Load Balancer

mergeable state: even a simple counter might differ on a combined stream vs. on separate streams Redundancy elimination Eliminate redundant operations, aka subgraph sharing B A B C D A B C D ?? applications together on a single core, one with operators B and C, the other with operators B and D. Redundancy elimination B A B C D A B C D ??? Vasiliki Kalavri | Boston University 2020 22 • Multi-tenancy selections on the same predicate • remove a dead subgraph, i.e. one that never produces output Redundancy elimination variations How can no-op or idempotent operators appear in an application? ??? Vasiliki

protocol • Time-Sensitive Networking (TSN) protocol • High-availability Seamless Redundancy (HSR)/Parallel Redundancy Protocol (PRP) • Network Configuration Protocol (NETCONF)/Yet Another Next Generation that the Zephyr RTOS kernel can be migrated to the EL2 level to develop ZVM, reducing system redundancy and improving system performance. • Memory virtualization: To protect the physical memory, the Storage service layer: provides various storage media services, such as garbage collection, cyclic redundancy check, and hash. • Driver layer: connects to different devices or logical volumes in the southbound

21 Availability Service Stays up when component fails © 2018 Percona. 22 Availability via Redundancy Have more than one system Works well for stateless systems Is not enough for databases © 2018 especially “used right” Partial Replication/Syncronization Smart conflict resolution Cross Vendor Redundancy © 2018 Percona. 28 Sharding Split data set by certain criteria and store such “shards” on

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 Debian Reference xiii 9.8.3 Data redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 9.23 List of tools to add data redundancy to files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 9.24 List Fonts Many useful scalable fonts are available for users on Debian. User’s concern is how to avoid redundancy and how to configure parts of installed fonts to be disabled. Otherwise, useless font choices may

exchange routes with each other using iBGP, outside of the regular Kubernetes REST interface. For redundancy, the vRouter agents on worker nodes always establish XMPP communications with two Contrail controllers performance. RKE2 also supports high availability (HA) deployments to ensure reliability and application redundancy. Rancher and RKE2 provide a robust range of features for managing and deploying Kubernetes clusters

adequate (10-50%) amount of free space available on a node. For disk fault tolerance and data redundancy, there are two reasonable approaches: • Use RAID0 on your data volume and rely on Cassandra replication practice than putting the commit log on the root volume (which is also a shared resource). For data redundancy, consider deploying your Cassandra cluster across multiple availability zones or using EBS volumes the data model is usually designed up front with the goal of normalizing the data to minimize redundancy. Normalization typically involves creating smaller, well-structured tables and then defining relationships

hosts instances of the ledger, and instances of chaincode. Note that this provides a deliberate redundancy in a Fabric network — it avoids single points of failure. We’ll learn more about the distributed disseminate the private data as a condition of the endorsement of the chaincode maxPeerCount: For data redundancy purposes, the number of other peers that the current endorsing peer will attempt to distribute distribution of the private data at endorsement time to ensure redundancy of the private data on multiple peers in the network. maxPeerCount: For data redundancy purposes, the maximum number of other peers (across

a 56 Chapter 4. Key Concepts hyperledger-fabricdocs Documentation, Release master deliberate redundancy in a Fabric network — it avoids single points of failure. We’ll learn more about the distributed the private data as a condition of the en- dorsement of the chaincode • maxPeerCount: For data redundancy purposes, the number of other peers that the current endorsing peer will attempt to distribute of the private data at endorsement time to ensure redundancy of the private data on multiple peers in the network. • maxPeerCount: For data redundancy purposes, the maximum number of other peers (across

algorithms, which can be a readability im- provement. • Appropriate use of default captures can remove redundancy and highlight important exceptions from the default. • Lambdas, std::function, and std::bind can C++11 extensions encourage coding practices that hamper readability—for example by removing checked redundancy (such as type names) that may be helpful to readers, or by encouraging template metaprogramming