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NCI Metathesaurus contains many individual vocabularies some of which are large vocabularies in and of themselves. It requires many hours to load and index. It can require 36 hours on a multiprocessor machine with 6 gb plus GB or more of memory. The total time to load the NCI MetaThesaurus will vary depending on machine, memory, and disk speed. Because this loader uses a batch loading strategy it is less dependent on memory, but some users will see 3 or 4 day load times with average multiprocessor processing power. While the batch loading process itself is not heavily memory dependent, the creating the index following the load will require at least 3 GB of memory. |
Step | Action |
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1 | Using a web or ftp client go to the URL: http://ncicb.nci.nih.gov/download/evsportal.jsp |
2 | Select the version of NCI Metathesaurus RRF you wish to download. There may only be one. Save the file to a directory on your machine. |
3 | Extract the files from the ZIP download and save to a directory on your machine. This directory will be referred to as NCI_METATHESAURUS_DIRECTORY. RELASE_INFO.RRF is required to be present for the load utility to work. |
4 | Check that you are able to open a large number of files before starting the load. |
| Code Block |
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ulimit -Hn |
Usually having around 10,000 available open files is sufficient. If your limit is set to low this will need to be raised.
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5 | Using the LexEVS utilities load the NCI Thesaurus:
For Windows installation use the following command:
For Linux installation use the following command:
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