Three superheroes, Batman, Spiderman, and Ben Tennyson are introduced. Batman introduces his friend Robin. Spiderman notes that he became good after being bad. Ben Tennyson shows what he looked like when he was younger.
Three superheroes, Batman, Spiderman, and Ben Tennyson are introduced. Batman introduces his friend Robin. Spiderman notes that he became good after being bad. Ben Tennyson shows what he looked like when he was younger.
This document summarizes the features, architecture, administration, capacity forecasting, replication, persistence, and table design concepts of Redis. Key points include Redis' data structures of strings, lists, hashes and sets; its single-threaded model with auxiliary threads; persistence via snapshots to disk and AOF logging; master-slave replication topology without resume of broken transfers; and example user login data modeled as keys and indexes in Redis.
This document provides information about an upcoming seminar on mental health, addiction and relationship issues hosted by journalist Wt. Correspondent. It encourages readers to attend and asks if they or their family members struggle with depression, addiction, anxiety or other mental health issues. It provides contact information for the journalist hosting the event.
PHP Coding Standard and 50+ Programming SkillsHo Kim
?
1. How and Why to write good code?
2. Coding standard based on ZendFramework and real world practise.
3. PHP programming skills from daily coding.
4. Some security tips
5. Some optimization tips
This document provides an introduction and overview of OpenStack, its components, and Compute infrastructure (Nova). OpenStack is an open source cloud computing platform that allows enterprises to setup and run cloud infrastructure. It consists of three main services - Compute (Nova), Storage (Swift), and Imaging (Glance). Nova is the underlying fabric controller that manages compute resources, networking, authorization and scalability. It exposes its capabilities via a REST API compatible with Amazon EC2.
This document provides an overview and notes on Redis, including:
1. An introduction to Redis, describing it as a key-value database similar to Memcached but with data persistence.
2. Descriptions of Redis' performance, features like sharding and master-slave replication, virtual memory functionality, and append only file functionality.
3. Instructions for installing and configuring Redis, including downloading, compiling, and configuring the redis.conf file.
4. An overview of Redis' data types including strings, lists, sets, and ways to operate on each type.
5. Information on starting Redis and checking that it is running properly.
This document discusses memory management techniques in Sun JDK 1.6. It begins by describing common OS memory allocation and garbage collection algorithms like reference counting, mark-sweep, and copying collection. It then details how Sun JDK implements generation scavenging GC using parallel and concurrent algorithms. Optimization techniques for young and full GCs like type inference, card tables, and partial compaction are also examined. Finally, the document briefly outlines some JRockit GC optimizations including pinned objects, two-color marking, and adaptive generation sizing.
This document discusses different types of joins in Greenplum including inner joins, left outer joins, right outer joins, full outer joins, and cross joins. It provides syntax examples and explanations of when each join type would be used. It also covers PostgreSQL database concepts like schemas, roles, users, privileges, and table constraints.
25. Data Cache
Mostly Memcached,some tips:
?http://tech.idv2.com/2008/08/17/memcached-pdf/
?Memcached pool
?How to batch update some related data?
?How to sync cache over IDC?