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Once the parameters have been input and the acknowledgment check box ticked the stack can be created.
SQL
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Lens
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ECSAMI is the machine image for the bastion host EC2 instance. This is defaulted to the Amazon recommended image and unless you have very specific requirements for the bastion host it can be left as is.
KeyName is the name of an existing EC2 KeyPair that can be used for SSH access to the bastion host. This will be required to run the lens as it is only possible to hit the /process endpoint of the lens with a REST request from the bastion host.
MappingsDirUrl is the URL for the directory where your mapping file is located. NB This has to be the S3 path i.e. beginning with s3:// . An example S3 path has been included as the default so must be replaced by your actual bucket S3 path. For the lens to be able to access your bucket it also must be run in the same region as the bucket. Details for creating a mapping file can be foundhere
OutputDirUrl is the URL for the directory where your transformed RDF output files should be stored. Again the example default must be replaced, S3 path used and the stack created in the same region.
ProvOutputDirUrl is the URL for the directory where your transformed RDF output files should be stored. Again the example default must be replaced, S3 path used and the stack created in the same region.
SQLLimit provides the maximum limit to the number of records that can be processed in any one query. This means that if your database contains more records that this set variable, the Lens will batch process the records from the query and output multiple RDF files. This value must be an integer greater than zero. It defaults to zero, meaning that iterative queries are switched off.
SQLOffset provides the ability to offset the start index of the iterative processing. This defaults to zero.
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