By Qiang Cao, Changsheng Xie (auth.), Yunjun Gao, Kyuseok Shim, Zhiming Ding, Peiquan Jin, Zujie Ren, Yingyuan Xiao, An Liu, Shaojie Qiao (eds.)
This ebook constitutes the refereed complaints of six workshops of the 14th foreign convention on Web-Age info administration, WAIM 2013, held in Beidaihe, China, June 2013. The 37 revised complete papers are equipped in topical sections at the six following workshops: The overseas Workshop on significant facts administration on rising (HardBD 2013), the second one foreign Workshop on great facts garage and Processing (MDSP 2013), the 1st foreign Workshop on Emergency administration in enormous information Age (BigEM 2013), the overseas Workshop on Trajectory Mining in Social Networks (TMSN 2013), the 1st overseas Workshop on Location-based question Processing in cellular Environments (LQPM 2013), and the 1st overseas Workshop on giant info administration and repair (BDMS 2013).
Read or Download Web-Age Information Management: WAIM 2013 International Workshops: HardBD, MDSP, BigEM, TMSN, LQPM, BDMS, Beidaihe, China, June 14-16, 2013. Proceedings PDF
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Additional resources for Web-Age Information Management: WAIM 2013 International Workshops: HardBD, MDSP, BigEM, TMSN, LQPM, BDMS, Beidaihe, China, June 14-16, 2013. Proceedings
Example text
2 0 0 Trace1 Trace Files 5 Trace2 SFCM Lazy_S SFCM Excute Time(Sec) 3000 2800 2600 2400 2200 2000 1800 1600 1400 1200 10 15 20 SSD Size/RAM Size Fig. 4. Run time on T1 25 30 Fig. 3. The number of SSD write on T1 3400 3200 5 10 SSD size/RAM size Fig. 2. Run time in a single device Excute Time(Sec) Lazy_S 25 30 Lazy_S 4200 4000 3800 3600 3400 3200 3000 2800 2600 2400 2200 2000 1800 1600 5 10 15 20 SSD Size/RAM Size Fig. 5. Run time on T2 25 30 26 J. Wang, W. Lai, and X. Meng SFCM SFCM Lazy_S Lazy_S 80% 80% SSD Hit Ratio SSD Hit Ratio 90% 70% 60% 50% 40% 30% 70% 60% 50% 40% 30% 5 10 15 20 25 SSD Size/RAM Size Fig.
2. The lowest 3 bits are always 000, which means writing 8 sectors, actually 4KB, to flash at one time. 6 represents 64 pages in each block and 23 indicates a logical block address. Combination of 23 and 6 represents a logical page address in the page mapping table. 2 also illustrates how the mapping table is searched when a page in the stored block has been updated. The second bit of logic 0 in block mapping is “1”, which means the corresponding page has modified and should be searched in the page mapping table.
When an evicted page is identified to reside in SSD, SFCM locate a fixed-size storage segment to hold it, which ensures write operation do not occur a scattered random write. When the available space in SSD is insufficient, SFCM computes the replacement priority for all segments according to their access frequency and the number of valid pages, and finds a victim segment with lowest priority. The page which is invalid or rarely accessed will be evicted out of the SSD. If the page evicted from SSD is dirty, SFCM will write it back hard disk.
