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一种基于MDL的日志序列模式挖掘算法 被引量:2
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作者 杜诗晴 王鹏 汪卫 《计算机工程》 CAS CSCD 北大核心 2021年第2期118-125,共8页
日志数据是互联网系统产生的过程性事件记录数据,从日志数据中挖掘出高质量序列模式可帮助工程师高效开展系统运维工作。针对传统模式挖掘算法结果冗余的问题,提出一种从时序日志序列中挖掘序列模式(DTS)的算法。DTS采用启发式思路挖掘... 日志数据是互联网系统产生的过程性事件记录数据,从日志数据中挖掘出高质量序列模式可帮助工程师高效开展系统运维工作。针对传统模式挖掘算法结果冗余的问题,提出一种从时序日志序列中挖掘序列模式(DTS)的算法。DTS采用启发式思路挖掘能充分代表原序列中事件关系和时序规律的模式集合,并将最小描述长度准则应用于模式挖掘,设计一种考虑事件关系和时序关系的编码方案,以解决模式规模爆炸问题。在真实日志数据集上的实验结果表明,与SQS、CSC与ISM等序列模式挖掘算法相比,该算法能高效挖掘出含义丰富且冗余度低的序列模式。 展开更多
关键词 数据挖掘 日志分析 事件关系 最小描述长度准则 序列模式
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PLQ:An Efficient Approach to Processing Pattern-Based Log Queries
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作者 Jia Chen Peng Wang +2 位作者 Fan Qiao Shi-Qing Du Wei Wang 《Journal of Computer Science & Technology》 SCIE EI CSCD 2022年第5期1239-1254,共16页
As software systems grow more and more complex,extensive techniques have been proposed to analyze the log data to obtain the insight of the system status.However,during log data analysis,tedious manual efforts are pai... As software systems grow more and more complex,extensive techniques have been proposed to analyze the log data to obtain the insight of the system status.However,during log data analysis,tedious manual efforts are paid to search interesting or informative log patterns from a huge volume of log data,named pattern-based queries.Although existing log management tools and DMBS systems can also support pattern-based queries,they suffer from a low efficiency.To deal with this problem,we propose a novel approach,named PLQ(Pattern-based Log Query).First,PLQ organizes logs into disjoint chunks and builds chunk-wise bitmap indexes for log types and attribute values.Then,based on bitmap indexes,PLQ finds candidate logs with a set of efficient bit-wise operations.Finally,PLQ fetches candidate logs and validates them according to the queried pattern.Extensive experiments are conducted on real-life datasets.According to experimental results,compared with existing log management systems,PLQ is more efficient in querying log patterns and has a higher pruning rate for filtering irrelevant logs.Moreover,in PLQ,since the ratio of the index size to the data size does not exceed 2.5%for log datasets of different sizes,PLQ has a high scalability. 展开更多
关键词 pattern query log analysis bitmap index log pattern
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