Introduction to VoltDB

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Presentation transcript:

Introduction to VoltDB Big Data & Analytics – Unites States AFPOA Fred Holahan, CMO, VoltDB, Inc. e: fholahan@voltdb.com p: +1.978.528.0560 February 2012

Objectives of this Talk Define Big Data – briefly Velocity, Volume and Variety Identify a few high velocity applications in the military Discuss VoltDB in the context of high velocity systems Design goals and concepts Identify helpful learning resources Q&A

Big Data – 3 Vs Properties Applications Solutions Velocity Volume Data that’s moving at very high speeds, often coming from real-time acquisition sources such as scanners, sensors and software-based monitors/collectors. Hot caching Real-time analytics Real-time alerting Pre-export enrichment VoltDB and other in-memory RDBMSs Volume Data coming from a variety of sources, accumulating into massive (Petabyte+) historical volumes. Cold storage Batch analytics (patterns, trends, anomalies) Hadoop and analytic datastores Variety Data with properties that are best supported by purpose-built datastores. Examples include document, graph and scientific data. Blogs Online forums Social networks NoSQL datastores

Connecting Velocity and Volume DEEP ANALYTICS (hours and up of latency) TRANSACTIONS, DASHBOARDS, FAST ANALYTICS (milliseconds of latency) High Volume Analytic Engine Incoming Events High Velocity Engine Processed Events Gigabytes to Terabytes of hot state Terabytes and up of cold history Do we put a Variety “stream” in this image? Skipping the Velociy Engine? Others

High Velocity Database Requirements Handle lots of independent events are at a very high frequency Update state, decisioning, transactions, enrichment, etc… Stay up in the face of failures Make handling failures and recovery as automatic as possible Support complex manipulations of state per event Support a range of real-time (or “near-time”) analytics Integrate easily with high volume analytic datastores Raw, enriched or sampled data is migrated to companion stores VoltDB 5

High Velocity Data in the Military Real-time battlefield applications Including simulation and training systems Surveillance Including real-time, constraint-based alerting Network intrusion – detect, isolate, mitigate Asset tracking Personnel Equipment and parts Ordinance Anything with a RFID tag VoltDB is being used today by the DIA, NSA and CIA for performance-sensitive intelligence applications.

What Is VoltDB? In-memory relational DBMS Ultra-high performance Millions of ACID TPS Single-millisecond latencies Scale out on commodity gear Choose a partitioning key, VoltDB does the heavy lifting Built-in fault tolerance and crash recovery Standard programming interfaces Build apps in the language of your choice Call Java stored procedures with parameterized, embedded SQL Open source (GPL3) and commercial licenses

Started with H-Store Project at MIT/Yale/Brown Rethink the RDBMS for 21st Century Built Screaming Fast In- memory RDBMS Prototype Productized as VoltDB H-Store research continues: http://hstore.cs.brown.edu/ ----- Meeting Notes (6/2/11 13:30) ----- Barron Schwartz quote

VoltDB Now: 1 Node Edition Per 8-core node: > 1 million SQL statements per second > 50,000 multi-statement procedures per second > 100,000 simpler procedures per second ----- Meeting Notes (6/2/11 13:30) ----- Barron Schwartz quote

Throughput & Scaling Scales to dozens of node Can easily scale to millions of events/transactions per second Most deployments use fewer than 10 nodes ----- Meeting Notes (6/2/11 13:30) ----- Barron Schwartz quote

VoltDB Scaling Model Tables are horizontally split into partitions Partitions deployed to CPU cores – scale up and out Infrequently-changing tables replicated across partitions

Inside a VoltDB Partition Each partition contains data and an execution engine The execution engine contains a queue for transaction requests Requests run to completion, serially, at each partition Work Queue execution engine Table Data Index Data

VoltDB Transactions SQL Transaction == Single SQL Statement or Stored Procedure Invocation Committed on Success Java Stored Procedures Java statements with embedded, parameterized SQL Efficiently process SQL at the server Move the code to the data, not the other way around SQL

Client Application Interfaces Client Options Libraries for Java, C++, C#, PHP, Python, Node.js (Javascript) and other popular languages JSON via HTTP Client connects to the cluster Data location is transparent Topology is transparent Cluster manages routing, data movement and consistency

VoltDB Transaction Model Procedures routed to, ordered and run at partitions VoltDB 15

Transaction Execution VoltDB Cluster Single partition transactions All data is in one partition Each partition operates autonomously Multi-partition transactions One partition distributes and coordinates work plans Server 1 Partition 1 Partition 2 Partition 3 Server 2 Partition 4 Partition 5 Partition 6 Server 3 Partition 7 Partition 8 Partition 9

Data Availability and Durability High Availability Data stored on server replicas (user configurable) Failover data redundancy No single point of failure Database Snapshots Simplifies backup/restore Scheduled, continuous, on demand Cluster-wide consistent copy of all data Command Logging Between Snapshots, every transaction is durable to disk

Tunable fsynch* frequency Command Logging Tunable fsynch* frequency Tunable snapshot interval Synchronous logging provides highest durability at reduced performance Asynchronous logging best performance at reduced durability * fsynch is when command log buffers are flushed to disk (or SSD)

Hadoop/OLAP Database Integration VoltDB high-throughput export feature Export of real-time and “near-time” data to target data stores Enrich data prior to export Pre-join, de-duplicate, aggregate VoltDB Export key features Loosely-coupled integration Buffer for impedance mismatches Auto-discovery of cluster configurations with retry Direct Hadoop integration

Hadoop/OLAP Database Integration Connector Receiver Data Queue VoltDB Server Target Database Queue Overflow Records are streamed to the export connector data queue (in-memory) Export receiver pulls from data queue, writes to downstream datastore Data queue overflows to disk if receiver doesn’t keep up Mitigates “impedance mismatches” Provides bi-directional durability

Database Management & Monitoring

VEM REST Management API Provides public interface to VoltDB’s admin and management services First-class citizen interface (used by VEM UI) Allows user-controlled actions Custom database admin UIs Scripting of common, repeatable activities Supports integration of 3rd party tools and cloud deployment environments

VoltDB Disaster Recovery (Beta) Disk snapshots replicated via storage system Stream command logs from Primary to Replica Run from Replica on DR event, reverse on recovery Primary Site Remote Replica Site (read only) Snap Shots VoltDB Cluster VoltDB Cluster

VoltDB Customers

VoltDB Resources Technical white papers VoltDB documentation http://voltdb.com/resources/whitepapers VoltDB documentation http://community.voltdb.com/documentation Software downloads http://voltdb.com/products-services/downloads Community forums http://community.voltdb.com/forum Sales contact +1.978.528.4660 sales@voltdb.com

- Thank You - Questions?