| Types | Key Value Store | Column Store | Document Store | Graph Database |
| Performance | High | High | High | Variable |
| Scalability | High | High | Variable (High) | Variable |
| Flexibility | High | Moderate | High | High |
| Complexity | None | Low | Low | High |
| Read | Consistent Read | Read rare | Read Intensive | More Read Intensive |
| Write | Consistent Write | Write Many | Not write Intensive | Less Write Intensive |
| Others | Caching
User Session Caching Contents |
IOT Quick stream OS |
Handle lots of variety of data | Data
Type may relate each other
Vertical Scaleout Horizontal Scaleout |
Got this during the execution of following command in R > dat Error: could not find function "read.xlsx" Tried following command > install.packages("xlsx", dependencies = TRUE) Installing package into ‘C:/Users/amajumde/Documents/R/win-library/3.2’ (as ‘lib’ is unspecified) also installing the dependencies ‘rJava’, ‘xlsxjars’ trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/rJava_0.9-8.zip' Content type 'application/zip' length 766972 bytes (748 KB) downloaded 748 KB trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/xlsxjars_0.6.1.zip' Content type 'application/zip' length 9485170 bytes (9.0 MB) downloaded 9.0 MB trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/xlsx_0.5.7.zip' Content type 'application/zip' length 400968 bytes (391 KB) downloaded 391 KB package ‘rJava’ successfully unpacked and MD5 sums checked package ‘xlsxjars’ successfully unpacked ...
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