4.2. New Index CI size calculation algorithm
Use your automation console function to detect the message in Figure 4-4, generating an alert.
Figure 4-4. Message due to index CI size too small
IDC3351I ** VSAM I/O RETURN CODE IS 212 Unable to split index; increase index CI size
After that, carefully read this topic.
VSAM uses a default minimum value for index CI size, if it determines that the one specified by you is not large enough. The algorithm that calculates this value was changed in z/OS V1 R3.
This change was to increase the likelihood that the index CI would be large enough to hold all the keys that can exist in a data CA. In a number of situations the default value calculated was not large enough. Because of this, there was a lot ...