Hitachi

Hitachi Advanced Database Setup and Operation Guide


16.23 Handling of data retrieval from CSV files (when the multi-node function is being used)

For details about the process of data retrieval from CSV files, see 11.15 Handling of data retrieval from CSV files. This section provides notes specifically for when the multi-node function is used.

When you are using the multi-node function, ensure that the CSV files can be referenced from all nodes. In addition, ensure that the absolute paths of the CSV files are the same on all nodes.

For example, if you are using NFS, which is a distributed file system, prepare directories for storing CSV files by using the following procedure.

Procedure:
  1. After preparing the NFS server, create the CSV file storage directory on the NFS server.

  2. Export the CSV file storage directory you created in step 1.

    Perform this operation on the NFS server.

  3. Mount the directory exported in step 2 so that the paths are the same on all nodes.

    Perform this operation on all nodes.

The following figure provides an example of a system configuration that uses NFS.

Figure 16‒9: Example of a system configuration that uses NFS

[Figure]