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Review on Main Memory Database

P. A. Deshmukh
2013 International journal of computer and communication technology  
This paper is a review on Main Memory Databases (MMDB).  ...  The idea of using Main Memory Database (MMDB) as physical memory is not new but is in existence quite since a decade.  ...  Other index structure supported by MMDB is heap file for handling a large number of fixed-length data items.  ... 
doi:10.47893/ijcct.2013.1183 fatcat:bquvdarbynhu7imxy4os5b2wti

Instant loading for main memory databases

Tobias Mühlbauer, Wolf Rödiger, Robert Seilbeck, Angelika Reiser, Alfons Kemper, Thomas Neumann
2013 Proceedings of the VLDB Endowment  
Once data is loaded, updates and queries are efficiently processed with the flexibility, security, and high performance of relational main memory databases.  ...  eScience and big data analytics applications are facing the challenge of efficiently evaluating complex queries over vast amounts of structured text data archived in network storage solutions.  ...  Hash table with chaining Hash tables are a popular in-memory data structure and are often used for indexes in main memory databases.  ... 
doi:10.14778/2556549.2556555 fatcat:j2ig6anp2zfo5e5jkla7ucqxvm

Holistic Indexing in Main-memory Column-stores

Eleni Petraki, Stratos Idreos, Stefan Manegold
2015 Proceedings of the 2015 ACM SIGMOD International Conference on Management of Data - SIGMOD '15  
In this paper, we present the design of holistic indexing for columnoriented database architectures and we discuss a detailed analysis against parallel versions of state-of-the-art indexing and adaptive  ...  Great database systems performance relies heavily on index tuning, i.e., creating and utilizing the best indices depending on the workload.  ...  Acknowledgments We would like to thank Victor Alvarez, Felix Martin Schuhknecht, Jens Dittrich and Stefan Richter for kindly providing the source code of the chunked coarse granular adaptive indexing algorithm  ... 
doi:10.1145/2723372.2723719 dblp:conf/sigmod/PetrakiIM15 fatcat:3u3vest7w5ccxfruhiayekiyq4

Main results of MONDILEX project

Ludmila Dimitrova, Violetta Koseska-Toszewa, Radovan Garabík, Tomaž Erjavec, Leonid Iomdin, Volodymyr Shyrokov
2015 Cognitive Studies | Études cognitives  
Main results of MONDILEX projectThe paper presents the results and recommendations of MONDILEX, a 7FP project that covered six Slavic languages: Bulgarian, Polish, Russian, Slovak, Slovene, and Ukrainian  ...  The paper summarizes the research undertaken on standardisation and integration of Slavic language resources and on the establishment of a virtual organisation supporting research infrastructure for Slavic  ...  dictionary entry structures and oriented to the creation of a multilanguage index in the automatic mode is necessary. • Standard format of available corpus data.  ... 
doi:10.11649/cs.2011.017 fatcat:6yil3iclyfbjpo25h6p7ko6ria


2020 Al-Azhar Bulletin of Science  
This paper's main purpose is to present a comparative study of the five main categories of NoSQL databases; key-value stores, document stores, column family stores, graph stores databases, and object store  ...  But when it comes to Bigdata, we need to use more flexible databases that satisfy the need to handle semi-structured and unstructured data. These databases are called NoSQL (Not only SQL) databases.  ...  This has created a critical need to develop a common query language that can support a variety of NoSQL database users.  ... 
doi:10.21608/absb.2020.210374 fatcat:umexpeuv3veo3o5ihqhn3pcvjq

Fast and failure-consistent updates of application data in non-volatile main memory file system

Jiaxin Ou, Jiwu Shu
2016 2016 32nd Symposium on Mass Storage Systems and Technologies (MSST)  
In this paper, we propose a novel file system optimized for nonvolatile main memories (NVMMs), FCFS, that offers a series of easy-to-use file-based interfaces to enable both correctness and high performance  ...  Importantly, FCFS requires modifications to no more than 0.06% of the original code for each ported application in order to support failure consistency.  ...  This work is supported by the National Natural Science  ... 
doi:10.1109/msst.2016.7897078 dblp:conf/mss/OuS16 fatcat:j6lniuobzrheznzz4kx2sblhrq

Supporting Database Applications as a Service

Mei Hui, Dawei Jiang, Guoliang Li, Yuan Zhou
2009 Proceedings / International Conference on Data Engineering  
To resolve the problems, we propose a multi-tenant database system called M-Store, which provides storage and indexing services for multi-tenants.  ...  BIT is efficient in that it does not store NULLs from unused attributes in the shared tables and MSI provides flexibility since it only indexes each tenant's own data on frequently accessed attributes.  ...  ACKNOWLEDGEMENT We would like to thank Beng Chin Ooi for his insight and supervision and NUS DBA Eng Koon Sze for his explanation on the features of a commercial system.  ... 
doi:10.1109/icde.2009.82 dblp:conf/icde/HuiJLZ09 fatcat:xwenh5tsfjcmdfyi4e65sbg5fq

Storing and processing temporal data in a main memory column store

Martin Kaufmann, Donald Kossmann
2013 Proceedings of the VLDB Endowment  
The goal of this PhD thesis is to develop a native support of temporal features for SAP HANA, which is a commercial inmemory column store database system.  ...  We present a novel data structure called Timeline Index and algorithms based on this index, which have a very competitive performance for all temporal operators beating existing best-of-breed approaches  ...  Architecture of SAP HANA SAP HANA was designed for supporting modern hardware such as multi-core systems and large main memories.  ... 
doi:10.14778/2536274.2536333 fatcat:22cf7q4usngp5ivv7g7eoi2tcu

Revisiting Reuse in Main Memory Database Systems

Kayhan Dursun, Carsten Binnig, Ugur Cetintemel, TIm Kraska
2017 Proceedings of the 2017 ACM International Conference on Management of Data - SIGMOD '17  
We focus on hash tables, the most commonly used internal data structure in main memory databases to perform join and aggregation operations.  ...  This paper studies a novel reuse model for intermediates, which caches internal physical data structures materialized during query processing (due to pipeline breakers) and externalizes them so that they  ...  This research is supported in part by the Intel Science and Technology Center for Big Data, NSF IIS-1526639 and NSF IIS-1514491.  ... 
doi:10.1145/3035918.3035957 dblp:conf/sigmod/DursunBCK17 fatcat:o7j5b6un3fethe53csln6yhbby

Opportunities for optimism in contended main-memory multicore transactions

Yihe Huang, William Qian, Eddie Kohler, Barbara Liskov, Liuba Shrira
2020 Proceedings of the VLDB Endowment  
Optimistic concurrency control, or OCC, can achieve excellent performance on uncontended workloads for main-memory transactional databases.  ...  Though these techniques are known, we apply them in a new context and highlight their potency: when combined, they lead to performance gains of 3.4× for MVCC and 3.6× for OCC in a TPC-C workload.  ...  A separate study presented a detailed evaluation of implementation and design choices in main-memory database systems, with a heavy focus on MVCC [55] .  ... 
doi:10.14778/3377369.3377373 fatcat:sbmrxnomh5hzbk6kocmeyfsuka

Query processing in main memory database management systems

Tobin J. Lehman, Michael J. Carey
1986 SIGMOD record  
We propose a new index structure, the T Tree, and we compare it to existing index structures in a main memory database environment.  ...  In this paper we present some results on index structures from an ongoing study of main memory database management systems.  ...  In addition to traditional database applications, there are a number of emerging applications for which main memory sizes will almost certainly be suffcient, applications that wish to be able to store  ... 
doi:10.1145/16856.16878 fatcat:aqhczp6glndhhljqxh3jgl4wsq

Revisiting Reuse in Main Memory Database Systems [article]

Kayhan Dursun, Carsten Binnig, Ugur Cetintemel, Tim Kraska
2016 arXiv   pre-print
We focus on hash tables, the most commonly used internal data structure in main memory databases to perform join and aggregation operations.  ...  However, these approaches are fundamentally ill-suited for use in modern main memory databases.  ...  Finally, as the main data set in all our experiments, we use a TPC-H database of SF = 10 with secondary indexes on all selection attributes used in our query workloads.  ... 
arXiv:1608.05678v1 fatcat:lqibmggfvreyxkxdv7uijnfigy

Main Findings [chapter]

2003 ICT and Economic Growth  
index of the state of these regulations in 1998.  ...  The study also found that flexible employment practices in retail trade were related to computer use.  ... 
doi:10.1787/9789264101296-2-en fatcat:nor3cvgnajcdbfc3jfqhmba4zq

Integrated Document-based Electronic Health Records Persistence Framework

Aya Gamal, Sherif Barakat, Amira Rezk
2021 International Journal of Advanced Computer Science and Applications  
They have multiple secondary functionalities, such as data reporting and clinical decision support.  ...  By utilizing its analytics services and multi-dimensional scaling architecture, Couchbase Server multi-node cluster outperforms the response times of MongoDB for both simple and complex healthcare data  ...  NoSQL databases refer to a category of flexible data storage systems that manage data using a key-value structure.  ... 
doi:10.14569/ijacsa.2021.0121017 fatcat:doy3afttv5gzbovsa3nmj4tm2y

Reducing the Storage Overhead of Main-Memory OLTP Databases with Hybrid Indexes

Huanchen Zhang, David G. Andersen, Andrew Pavlo, Michael Kaminsky, Lin Ma, Rui Shen
2016 Proceedings of the 2016 International Conference on Management of Data - SIGMOD '16  
For a main-memory database, however, these indexes consume a large fraction of the total memory available and are thus a major source of storage overhead of in-memory databases.  ...  Our second contribution is Dual-Stage Transformation (DST), a set of guidelines for converting any order-preserving index structure into a hybrid index.  ...  ACKNOWLEDGMENTS This work was supported by funding from U.S.  ... 
doi:10.1145/2882903.2915222 dblp:conf/sigmod/ZhangAPKMS16 fatcat:rh4qexnquvfolddctr3fqory44
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