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Adaptive sampling-based profiling techniques for optimizing the distributed JVM runtime
2010
2010 IEEE International Symposium on Parallel & Distributed Processing (IPDPS)
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We present the design and preliminary performance result of our distributed JVM with the profiling implemented. ...
To preserve locality across migrations, we also propose a stack sampling mechanism for profiling the set of objects which are tightly coupled with a migrant thread. ...
We denote this metadata by the term sticky-set footprint. ...
doi:10.1109/ipdps.2010.5470461
dblp:conf/ipps/LamLW10
fatcat:4nouq2dou5hvtfm56ajn3mdrzi
Web metadata standards: observations and prescriptions
2005
IEEE Software
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0 7 4 0 -7 4 5 9 / 0 5 / $ 2 0 . 0 0 © 2 0 0 5 I E E E Metadata standards Content metadata standards are built on top of infrastructure standards that standardize metadata representation and exchange. ...
Here are two examples: feature Web Metadata Standards: Observations and Prescriptions ...
In addition, independent individuals following those guidelines might contribute pieces of a wider ontology, with internally consistent results. ...
doi:10.1109/ms.2005.25
fatcat:dqelld3b4vgbjlnv35ztwpx2fu
Safe and Efficient Remote Application Code Execution on Disaggregated NVM Storage with eBPF
[article]
2020
arXiv
pre-print
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With rapid improvements in NVM storage devices, the performance bottleneck is gradually shifting to the network, thus giving rise to the notion of "data movement wall". ...
Using this information, the code will read the metadata block, and return the data blocks that the query needs to process (e.g., by considering the minimal and maximum values of a column). ...
Summarizer offloads parts of computation on wimpy SSD ARM cores by enhancing the NVMe protocol [35] . Willow [52] is a programmable SSD with an attached FPGA. ...
arXiv:2002.11528v1
fatcat:pakee73fybct7jf6hkbyfhwpza
On the Usage of Global Document Occurrences in Peer-to-Peer Information Systems
[chapter]
2005
Lecture Notes in Computer Science
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We develop a technique based on the notion of global document occurrences (GDO) that, when processing a query, penalizes frequent documents increasingly as more and more peers contribute their local results ...
We argue that the additional effort to create and maintain the GDO information is reasonably low, as the necessary information can be piggybacked onto the existing communication. ...
for query execution rely on large amounts of document metadata. ...
doi:10.1007/11575771_21
fatcat:yupbi5tp2vcexebgy5ruiwcusu
Goods
2016
Proceedings of the 2016 International Conference on Management of Data - SIGMOD '16
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the metadata to users. ...
rethink how we organize structured datasets at scale, in a setting where teams use diverse and often idiosyncratic ways to produce the datasets and where there is no centralized system for storing and querying ...
Moreover, some of these tools can enhance the catalog with additional metadata that apply in other use cases. ...
doi:10.1145/2882903.2903730
dblp:conf/sigmod/HalevyKNOPRW16
fatcat:6cfppfhlbvebdphw2a7kidgnli
Hierarchical and scalable peer-to-peer architecture for online social network
2021
Journal of King Saud University: Computer and Information Sciences
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By using a hierarchical architecture based on structured P2P network with (2) two levels, our architecture is able to handle a large number of users in an effective manner. ...
metadata of a replica-set (see Section 3.4.2). ...
Notation Definition kðcn 1 :cn 2 Þ Requested key k with k.cn 1 = id cluster and k.cn 2 = idpeer super-peer Query k Super-peer of the cluster from which the lookup query for the key k is output successor-super ...
doi:10.1016/j.jksuci.2021.04.009
fatcat:lvxo67mbs5ccde6p272gmzjgxq
Discovering and exploiting keyword and attribute-value co-occurrences to improve P2P routing indices
2006
Proceedings of the 15th ACM international conference on Information and knowledge management - CIKM '06
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results. ...
Together with the coarse granularity of per-peer summaries, which are mandated for scalability, this limitation may lead to poor search result quality. ...
, 3. pinit possibly combines this measure with other indicators of pi's result quality and novelty, and 4. pinit forwards the query ab to these selected peers and eventually merges their local results. ...
doi:10.1145/1183614.1183643
dblp:conf/cikm/MichelBNTWZ06
fatcat:lmjspbodn5c43kosmgk3da7hpy
Automated Statistics Collection in DB2 UDB
[chapter]
2004
Proceedings 2004 VLDB Conference
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The use of inaccurate or outdated database statistics by the query optimizer in a relational DBMS often results in a poor choice of query execution plans and hence unacceptably long query processing times ...
ASC monitors both the update-delete-insert (UDI) activities on the data as well as query feedback (QF), i.e., the results of the queries that are executed on the data. ...
The second process monitors query results on a table. ...
doi:10.1016/b978-012088469-8.50100-5
dblp:conf/vldb/AboulnagaHLLMPR04
fatcat:ykz6hmdpvzduzjxuhogtvd3fja
Automated Statistics Collection in DB2 UDB
[chapter]
2004
Proceedings 2004 VLDB Conference
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The use of inaccurate or outdated database statistics by the query optimizer in a relational DBMS often results in a poor choice of query execution plans and hence unacceptably long query processing times ...
ASC monitors both the update-delete-insert (UDI) activities on the data as well as query feedback (QF), i.e., the results of the queries that are executed on the data. ...
The second process monitors query results on a table. ...
doi:10.1016/b978-012088469-8/50100-5
fatcat:aj3m3oh6ujhithdw5f34d6xfju
HAWQ
2014
Proceedings of the 2014 ACM SIGMOD international conference on Management of data - SIGMOD '14
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extensible framework for supporting various popular Hadoop based data stores and formats, and various optimization choices we considered to enhance the query performance. ...
This paper presents the novel design of HAWQ, including query processing, the scalable software interconnect based on UDP protocol, transaction management, fault tolerance, read optimized storage, the ...
For some queries, such as insert, some metadata is changed by QEs. To record the changes, we piggyback the changes in the master-tosegment connections. ...
doi:10.1145/2588555.2595636
dblp:conf/sigmod/ChangWMJMGLCWSB14
fatcat:hdbxw6v2ffdlfk5ufeys4etypy
AndroVault: Constructing Knowledge Graph from Millions of Android Apps for Automated Analysis
[article]
2017
arXiv
pre-print
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It has started with a long-running web crawler for data collection (both apps and description) since 2013, which guarantees the timeliness of data; With static analysis and dynamic analysis of the collected ...
With the produced data of high quality, we have successfully conducted many research works including malware detection, code generation, and Android testing. ...
In addition, they figure out 20 types of app metadata to share with the research community for relevant research works. ...
arXiv:1711.07451v2
fatcat:wjlhwcdepvelbmqk5gju3b5s2y
Tracking bad apples
2007
SIGPLAN notices
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The key idea is value piggybacking: when the original program stores an unusable value, value piggybacking instead stores origin information in the spare bits of the unusable value. ...
We evaluate two implementations: the first tracks null pointer origins in a JVM, and the second tracks undefined value origins in a memorychecking tool built with Valgrind. ...
Second, it indicates simply that the query failed, with no error message or exception indicating why. ...
doi:10.1145/1297105.1297057
fatcat:5txotam6ifhjli6cahcnbis3oe
A Survey on Web Service Discovery Approaches
[article]
2012
arXiv
pre-print
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Some approaches suggest enhancement in web service request based on metadata about web services generated by feedback of other users. ...
Taxonomical similarity between advertisements and query is the similarity of their taxonomical categorization in a Profile subclass hierarchy. ...
arXiv:1206.5582v1
fatcat:mze2oy7tfra4becrieb54mimou
The database research group at the Max-Planck Institute for Informatics
2006
SIGMOD record
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For enhanced quality of search results, relevance feedback is a well-known IR technique that expands keyword queries from the content of elements marked as relevant by the user. ...
Preliminary results with this approach are presented in [20] . ...
doi:10.1145/1168092.1168099
fatcat:zbcp54czabflhf5hn6jzz3nc4q
Distributed Caching for Complex Querying of Raw Arrays
[article]
2018
arXiv
pre-print
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As applications continue to generate multi-dimensional data at exponentially increasing rates, fast analytics to extract meaningful results is becoming extremely important. ...
We design cache eviction and placement heuristic algorithms that consider the historical query workload. ...
Results The code contains special functions to harness detailed profiling data. We perform all experiments at least 3 times and report the average value as the result. ...
arXiv:1803.06089v1
fatcat:fnzuiwxywzahdlynqyxa4lto7i
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