Definition of Column family


Column family is a predefined arbitrary set of columns and stored in HBase Schema. To create some column in family you should create family first. A column family regroups data of a same nature in HBase and has no constraint on the type. For each Row data in one Column family is physically stored at one server. Each Column family has is attributes like: Compression, Timestamps, Block Cache and etc.

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Product series of the WDM product family
Huawei WDM/OTN series end-to-end intelligent optical transport platforms are applicable to the backbone core layer, metro core layer, metro convergence layer, and metro edge access layer. These series platforms support universal switching and flexible grooming for OTN, SDH, and packet services, coherent technology-based, large-capacity, and ultra-long 100G and 40G transmission, WSS-based dynamic optical-layer grooming at ROADM sites, and the ASON/GMPLS control plane. Facilitated by these platforms, carriers can enjoy more flexible transmission, quicker service provisioning, more reliable network, and easier maintenance, therefore ensuring better services and generating more profits. OTN-based new-generation WDM products have the following product series: OptiX OSN 1800: It is mainly applicable to the metro edge layer, including the metro convergence layer and metro access layer. On small-capacity networks, it is also applicable to the core layer. OptiX OSN 3800: It is mainly applicable to the metro convergence layer and metro access layer. OptiX OSN 6800: It is applicable to long-haul backbone networks, regional backbone networks, local networks, the metro convergence layer, and the metro core layer. OptiX OSN 8800: It is mainly applicable to the backbone core layer, and is also applicable to the metro core layer and metro convergence layer. OptiX OSN 9800: It is developed to satisfy the requirements for ultra large capacities and bandwidth.

Definition of Kafka
Kafka is a distributed, partitioned, and replicated message publishing and subscription system that provides features similar to the Java Message Service (JMS). Kafka features message persistence, high throughput, distribution, multi-client support, and real-time processing, and applies to online and offline message consumption. It is ideal for Internet service data collection scenarios, such as conventional data collection, active website tracing, aggregation of operation data in statistics systems (monitoring data), and log collection.

Definition of Tomcat
Tomcat is a free-of-charge, lightweight, open source web application server developed by Apache Software Foundation, Sun and other companies, and individuals. Gaining support from Sun, Tomcat complies with the latest Servlet and JavaServer Page (JSP) specifications. It features advanced technology, stable performance, and good scalability, and occupies a small number of system resources during running. As a result, Tomcat applies to small- and medium-sized systems and scenarios with a few concurrent users. An HTTP server embedded in Tomcat enables Tomcat to work as a web server. It provides a configuration management tool and supports XML configuration files. Tomcat is different from the Apache web server, which is an HTTP server using C language.

Definition of Flume
Flume is a distributed, highly reliable, and HA massive log aggregation system. It supports custom data transmitters for data collection. Flume also processes data roughly and writes data to customizable receivers.

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