Treemap 4.1 Documentation

Treemap 4.1 Documentation

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How large a tree could I display with Treemap?

We have not focused on optimizing Treemap for very large data files, and chose instead to improve the functionalities of Treemap. Nevertheless we can say that Treemap was successfully used in the following cases:
- Mapping a directory comprising of 54,000 files with 20 levels.
- Data Files with 25,000 nodes along with 8-9 attributes.
The size of the tree you can display with Treemap will also depend on the amount of memory allocated to run Treemap. In some cases it might help to increase the maximum memory allocated to Java heap size. This is done in the command line that starts Treemap by adding the "-Xmxm" parameter. For example to set the max memory for Treemap to be 256M, change the run.bat file to look like this:

java -Xmx256M -jar Treemap.jar
If you don't specify a maximum size, then the default maximum size is taken as 64M. If Treemap doesn't have enough memory, it will display a message indicating that it is out of memory.
(Note: Since Treemap 4.1 out of memory errors are handled more smoothly than earlier versions. For this reason, the use of log files has been discontinued.)
If you are dealing with extremely large trees, you might want to look at this project: Visualizing a million items, and also look at the results of the InfoVis Contest 2003.