本系列为CMU 15-445 Fall 2022 Database Systems 数据库系统 [卡内基梅隆]课程重点知识点摘录,附加个人拙见,同样借助CMU 15-445课程内容来完成MIT 6.830 lab内容。 Parallel & Distributed 随着摩尔定律逐渐失效,处理器走向多核,系统可以通过并行执行增加吞吐量,减少延迟,使得系统响应更快。 Parallel:如运行在多核 CP...
Parallel (并行)& Distributed(分布式) Parallel:如运行在多核 CPU 上 每个DB 节点物理上非常接近,通过高速 LAN 相连接 通信成本极小 Distributed:如分布式数据库 节点之间距离可能很远,通过公网相连接 通信成本和通信可能出现的问题不可忽略 Inter-query(查询间隔) vs. Intra-query Parallelism(查询内并行性) Inter-...
Performance Evaluation Methods for Distributed MPP Databases - Best Practice for PostgreSQL index scan. 7.Hard drive bandwidth and interface speed The bandwidth interface speeds of a hard... supports tpc-h testing. References : 《TPC-H testing - PostgreSQL 10 vs Deepgreen(Greenplum)》 Testing a...
Raynal, M. Parallel Computing vs. Distributed Computing: A Great Confusion? (Position Paper). In: Hunold, S.; Costan, A.; Gimenez, D.; Iosup, A.; Ricci, L.; Gomez Requena, E. M.; Scarano, V.; Varbanescu, L. A.; Scott, L. S.; Lankes, S.; Weidendorfer, J.; Alexander...
Even today there are large distributed systems with SMP nodes who in total run a distributed database system. - In the near future, we will find SMP structures on processor chips, complete with partitioned caches, shared higher-level caches etc.. The real challenge in those future systems wil...
ParallelX的联合创始人Tony Diepenbrock表示,这是一个“GPU编译器,它能够把用户使用Java编写的代码转化为OpenCL,并在亚马逊AWS GPU云上运行”。它的最终产品是一项与亚马逊Elastic MapReduce类似的服务,只不过不同之处在于它将利用EC2 GPU实例类型。 毫无疑问,亚马逊并不是唯一一家提供GPU服务器的云服务提供商,其他诸...
There are distributed file systems that stripe data. The difference is that parallel file systems then expose stripes directly to clients, via communication with the hosting storage servers themselves. Striping allows for significant parallel I/O over a standard distributed NAS system. NFS clients ...
Distributed Parallel Tests on CI systems)learn howparallel_testscan run on distributed servers such as Travis and GitLab-CI. Also shows you how to use parallel_tests without addingTEST_ENV_NUMBER-backends Capybara setup Sphinx setup Capistrano setuplet your tests run on a big box instead of you...
MongoDB is a document-based distributed database. We connect MongoDB to Kafka as a consumer via the mongodb-kafka connector [46] provided by MongoDB. Incoming data records from a Kafka topic (i.e., an external data source) are persisted in a corresponding MongoDB collection as JSON-like...
Directed Acyclic Graph (DAG) workflows are widely used for large-scale data analytics in cluster-based distributed computing systems. The performance model for a DAG on data-parallel frameworks (e.g., MapReduce) is a research challenge because the allocation of preemptable system resources among pa...