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A novel method to extend flash memory lifetime in flash based dbms

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Zhichao Liang
Zhichao Liang
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A novel method to extend flash memory lifetime in flash-based DBMS Zhichao Liang(Renmin University of China) [email_address]
Outline ,[object Object],[object Object],[object Object],[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object]
SSD Write-lifetime 60GB X 5000 =300TB 40TB (60GB drive) 37TB (80GB drive) Maximum amount of data can be written to SSD Extending SSD Lifetimes with Disk-Based Write Caches by Gokul Soundarajan. FAST 10
Original sin ,[object Object],[object Object],[object Object],[object Object],[object Object],Behave the write pattern !
Free space management ,[object Object],[object Object],[object Object],[object Object],Towards Effective and Efficient Free Space Management by Mark L. McAuliffe. ACM SIGMOD Record
The endemic ,[object Object],[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object]
The overview ,[object Object]
Append in file and memory ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Write buffer (cont.) ,[object Object]
Write buffer (cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Clustering and Non-clustering Effects in Flash Memory Databased by Duck-Ho Bae. 20 th DEXA
Merge operation ,[object Object]
Merge operation (cont.) ,[object Object],Write buffer PageId Offset Length 2 48 256 17 56 700 2 4012 120 5 569 400 2 345 3000 Page 2 3376 Page 5 400 Page 17 700 (48, 256) valid valid (345, 3000) valid (4012, 120) valid valid valid
Outline ,[object Object],[object Object],[object Object],[object Object]
Experiment evaluation ,[object Object],[object Object],[object Object],Tracefile1 R/W=2/8 Tracefile2 R/W=4/6 Tracefile3 R/W=6/4 Tracefile4 R/W=8/2 A Flexible Simulation Environment for Flash-aware Algorithms by Peiquan Jin. CIKM 09
Experiment evaluation (cont.) ,[object Object],[object Object]
Experiment evaluation (cont.) ,[object Object],[object Object]
Outline ,[object Object],[object Object],[object Object],[object Object]
Conclusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Q & A

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A novel method to extend flash memory lifetime in flash based dbms

  • 1. A novel method to extend flash memory lifetime in flash-based DBMS Zhichao Liang(Renmin University of China) [email_address]
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  • 4. SSD Write-lifetime 60GB X 5000 =300TB 40TB (60GB drive) 37TB (80GB drive) Maximum amount of data can be written to SSD Extending SSD Lifetimes with Disk-Based Write Caches by Gokul Soundarajan. FAST 10
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