Estimation of availability and reliability in CurveBS CurveBS uses the RAFT protocol to maintain consistency of stored data. It generally takes the form of 3 replicas of data. If one replica fails required to handle the failure according to the actual situation of the system. Estimation of availability and reliability in the three- replicas case Assume that the total number of disks in Curve

vkalavri@bu.edu Spring 2020 3/17: High availability, recovery semantics, and guarantees Vasiliki Kalavri | Boston University 2020 Today’s topics • High-availability and fault-tolerance in distributed stream Vasiliki Kalavri | Boston University 2020 Further resources • Jeong-Hyon Hwang et al. High-Availability Algorithms for Distributed Stream Processing. (ICDE ’05). • http://cs.brown.edu/research/aurora/hwang

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-incubating 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this the working directories of all the forked sub-processes, a.k.a. SQL engines. 14 Chapter 6. High Availability Kyuubi, Release 1.6.1-incubating Running Kyuubi As mentioned above, for a quick start deployment

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-incubating 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this • bin: the entry of the Kyuubi server with kyuubi as the startup script. 14 Chapter 6. High Availability Kyuubi, Release 1.5.0-incubating • conf: all the defaults used by Kyuubi Server itself or creating

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-incubating 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this • bin: the entry of the Kyuubi server with kyuubi as the startup script. 14 Chapter 6. High Availability Kyuubi, Release 1.5.1-incubating • conf: all the defaults used by Kyuubi Server itself or creating

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-incubating 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this • bin: the entry of the Kyuubi server with kyuubi as the startup script. 14 Chapter 6. High Availability Kyuubi, Release 1.5.2-incubating • conf: all the defaults used by Kyuubi Server itself or creating

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-incubating 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this the working directories of all the forked sub-processes, a.k.a. SQL engines. 14 Chapter 6. High Availability Kyuubi, Release 1.6.0-incubating Running Kyuubi As mentioned above, for a quick start deployment

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Release 1.3.0 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this the working directories of all the forked sub-processes, a.k.a. SQL engines. 14 Chapter 6. High Availability Kyuubi, Release 1.3.0 Running Kyuubi As mentioned above, for a quick start deployment, then

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Release 1.3.0 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this the working directories of all the forked sub-processes, a.k.a. SQL engines. 14 Chapter 6. High Availability Kyuubi, Release 1.3.0 Running Kyuubi As mentioned above, for a quick start deployment, then

of Use 5 3 Run Anywhere 7 4 High Performance 9 5 Authentication & Authorization 11 6 High Availability 13 6.1 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-incubating 12 Chapter 5. Authentication & Authorization CHAPTER SIX HIGH AVAILABILITY Kyuubi provides both high availability and load balancing solutions based on Zookeeper. 6.1 Quick Start In this Server itself or creating a session with Spark applications. • externals 14 Chapter 6. High Availability Kyuubi, Release 1.4.1-incubating – engines: contains all kinds of SQL engines that we support