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有时我喜欢安静,有时我喜欢热闹。 有时我喜欢加入人群,有时我喜欢远离他们,独自呆着。 冬天我渴望阳光,夏天我盼望下雪。 春去秋来,不变的是我的学术信仰、志向和兴趣。一直思考着:什么是语用?为什么要研究语用?怎样研究语用?研究语用需要具备哪些素质?谁在研究语用?语用研究的走势如何?存在哪些问题?等等。 我深信“宁静”方可“致远”的道理,努力走向这种境界。 求学、求真的路上,深深领悟到过程决定结果,过程大于结果,远远大于结果。

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2016-08-17 20:58:33|  分类: 默认分类 |  标签: |举报 |字号 订阅

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ALERT [WEBINAR] The Art of Visibility: Enabling Multi-Platform Management Home Dictionary Tags Hardware Memory Database Shard Definition - What does Database Shardmean? A database shard is a horizontal partition in a search engine or database. Each individual partition is known as shard or database shard. Each database shard is kept on a separate database server instance to help in spreading the load. Database shards are based on the fact that after a certain point it is feasible and cheaper to scale sites horizontally than vertically by adding more machines. Techopedia explains Database Shard Within a database, some data always remains in all database shards. In fact, all database shards act as the single source for the unique subset of data. One of the salient features associated with database shards is that they are much faster. Individual database shards can simply outperform a single large database due to its smaller size. There is significant reduction of disk I/O, as the ratio between the memory and data on disk is also improved. This also results in fewer database locks, faster index searches and improvement in individual transaction performances. Database sharding is a highly scalable technique in order to improve the overall performance and throughput of large database-centric business applications and high transactions. Database shards help in improving scalability with growth in a near linear fashion. They are easier to manage as common database maintenance can be easily done on database shards. Database shards also help in reducing costs, as most implementations take advantage of lower-cost open-source databases. There are challenges to having database shards, like having automated backups for the shards, database shard redundancy and disaster recovery strategy. Database shards are increasingly becoming more popular due to the exponential rise in transaction volume and business application databases. Database shards are mostly used by social networking websites, online service providers and software as a service companies. Related Terms Database (DB) Distributed Database Database Server Database Row Multidimensional Database Management System (MDBMS) Related Articles Database Administration Careers 101 Keeping Up With the Data Explosion by Virtualizing Storage How Graph Databases Bring Networking to Data Promoted Stories One Simple Trick To Find Out If They Are Cheating Instant Checkmate The Hearing Aid of the Future is Here hear.com Need to Fix Antique Cars? The Data Dilemma DATAVERSITY 10 Hilarious Wedding Pictures That Will Not Make The Album LOLWOT LISTS Facts vs. Myths: What You Need to Know About Check Point Check Point 4 Signs It's Time to Look into NoSQL MarkLogic Recommended by Related Tutorials Introduction to Databases Promoted Stories Free Report: Check Point Declared a Leader in Network Firewalls Check Point 10 Free Apps You Just MUST Have On Your Phone Appnext Outlaws: The 20 Wealthiest Criminals Ever My 1st Class Life How to Make Pemmican - The Ultimate Survival Food The Lost Ways Free Report: The Latest Trends in Automated Malware Analysis Check Point Why Generational Theory Makes No Sense Oracle on Forbes Recommended by Related Tags Categories: HardwareDatabasesMemory Home | Advertising Info | Write for Us | About |Contact Us Copyright ? 2016 Techopedia Inc.. - Terms of Use - Privacy Policy
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