Newsql的Crash Recovery比传统的单机数据库相比,除了要保证数据不丢失,还要尽可能地减少down time。Master挂了之后,除了要load checkpoint and WAL from local storage,还要pull new logs starting from new master。这种实现一般是physical的log,因为只有这样同步起来才会比run sql要快很多。 感觉这一部分也是老生常谈...
首先是关系型模型,也就是还是在关系型这个基础理论之上“new”;其次是扩展能力;最后是既要NOSQL的扩展能力,还要保证OLTP场景的性能表现。所以,实现思路自然也可以分为两个方向:从关系数据库出发和从nosql角度出发。 所以文中也把NEWSQL分成了三类: (1)全新设计的架构,并且还不包括基于NOSQL改造的。 (2) 中间件...
论文解析 -- What’s Really New with NewSQL? ABSTRACT (点题)A new class of database management systems (DBMSs) called NewSQLtout(吹捧)their ability to scale modern on-line transaction processing (OLTP) workloads in a way that is not possible with legacy systems. (来源)The term NewSQL wa...
memory-oriented 的 NewSQL 数据库中的创新点在于尝试将数据库中比较不活跃的数据清出内存,从而减少内存使用,这使得这些 NewSQL 数据库能够存储比它内存空间更大的数据而无需回到 disk-oriented 的存储架构。广义地说,这类做法都需要建立一个内部跟踪机制来发现内存中不活跃的记录,在必要时将其清出到外存。以 H-...
1. A BRIEF HISTORY OF DBMSs and THE RISE OF NEWSQL (1)the older DBMSs from the 1980-1990s (2)the NoSQL DBMSs from the 2000s 随着Internet 的发展,一方面,企业所需存储的数据规模不断增加;另一方面,在线业务必须 24 小时不间断的对外提供服务。
It is intended to let the attendees better appreciate what is really behind the covers of many of the modern database systems (e.g., NoSQL and NewSQL s... C Mohan - International Conference on Management of Data 被引量: 3发表: 2013年...
“What companies really want is the ‘single-source-of-truth’ confidence they’ve always had from enterprise SQL, coupled with the scale of NoSQL.” VoltDB’s Duckworth said he sees “a lot” of companies hopping off the NoSQL bandwagon because they’ve been burned by the lack of ...
What’s Really New with NewSQL 论文 先导 为什么需要NewSQL? 数据的急速扩增,需要数据库具有很强的扩展性,往往有两种扩展方式: 垂直扩展:scale-up 水平扩展: scale-out,采用中间件,做sharding的方式,即分库分表的方式 NoSQL 代表性的DB Google’s BigTable — HBASE(开源版) Amazon’s Dynamo — Cass...
known as the log, and the log manager component of the DBMS is used to ensure that log records are made efficiently and accurately. The DBMS uses the log manager during shutdown and startup to ensure data integrity, and it interfaces with database utilities to create backups and run ...
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