The nemesis library was originally an extension to the ExodusII library which provided routines required to support use of Exodus databases in a parallel setting; typically with a file-per-processor usage.

Since the use of Exodus in parallel executions is now very common, the Nemesis library routines have been integrated into the Exodus library API. In most cases, the exodus API function corresponding to a nemesis API function is obtained by replacing the ne_ prefix with an ex_ prefix. There are a few routines where this results in a name collision or confusion (e.g. ne_put_version() is ex_put_nemesis_version() since it would be confusing to call it ex_put_version()). The partial read/write functions which in nemesis are indicated by a _n_ in the function name have been in replaced by _partial_ (although the corresponding ex_*_n_* function does exist in the deprecated functions).

The tables below list all Nemesis API functions and the corresponding Exodus API function. In many cases, the only change needed is replacing ne_ by ex_, but the routines which were made more "generic" (e.g. ne_get_n_side_set() and ne_get_n_node_set() directly map to ex_get_n_side_set() and ex_get_n_node_set() which are deprecated, so the table below shows the recommended ex_get_partial_set()) additional arguments are required.

The nemesis library can still be used since it is still built upon request and its implementation is simply wrapper routines which forward all existing nemesis function calls to the appropriate Exodus function call (with needed argument changes).

Initial Information Routines

Nemesis API	Exodus API
ne_get_init_info	ex_get_init_info()
ne_put_init_info	ex_put_init_info()
ne_get_init_global	ex_get_init_global()
ne_put_init_global	ex_put_init_global()
ne_put_version	ex_put_nemesis_version()

Loadbalance Parameter Routines

Nemesis API	Exodus API
ne_get_loadbal_param	ex_get_loadbal_param()
ne_put_loadbal_param	ex_put_loadbal_param()
ne_put_loadbal_param_cc	ex_put_loadbal_param_cc()

Nodeset, Sideset & Element Block Global Parameter Routines

Nemesis API	Exodus API
ne_get_ns_param_global	ex_get_ns_param_global()
ne_put_ns_param_global	ex_put_ns_param_global()
ne_get_ss_param_global	ex_get_ss_param_global()
ne_put_ss_param_global	ex_put_ss_param_global()
ne_get_eb_info_global	ex_get_eb_info_global()
ne_put_eb_info_global	ex_put_eb_info_global()

Nodeset, Sideset & Element Block Subset Routines

Nemesis API	Exodus API
ne_get_n_side_set	ex_get_partial_set()
ne_put_n_side_set	ex_put_partial_set()
ne_get_n_side_set_df	ex_get_partial_set_dist_fact()
ne_put_n_side_set_df	ex_put_partial_set_dist_fact()
ne_get_n_node_set	ex_get_partial_set()
ne_put_n_node_set	ex_put_partial_set()
ne_get_n_node_set_df	ex_get_partial_set_dist_fact()
ne_put_n_node_set_df	ex_put_partial_set_dist_fact()
ne_get_n_coord	ex_get_partial_coord()
ne_put_n_coord	ex_put_partial_coord()
ne_get_n_elem_conn	ex_get_partial_conn()
ne_put_n_elem_conn	ex_put_partial_conn()
ne_get_n_elem_attr	ex_get_partial_attr()
ne_put_n_elem_attr	ex_put_partial_attr()
ne_get_elem_type	ex_get_elem_type()

Variable Routines

Nemesis API	Exodus API
ne_get_n_elem_var	ex_get_partial_var()
ne_put_elem_var_slab	ex_put_partial_var()
ne_get_n_nodal_var	ex_get_partial_var()
ne_put_nodal_var_slab	ex_put_partial_var()

Number Map Routines

Nemesis API	Exodus API
ne_get_n_elem_num_map	ex_get_partial_id_map()
ne_put_n_elem_num_map	ex_put_partial_id_map()
ne_get_n_node_num_map	ex_get_partial_id_map()
ne_put_n_node_num_map	ex_put_partial_id_map()
ne_get_node_map	ex_get_processor_node_maps()
ne_put_node_map	ex_put_processor_node_maps()
ne_get_elem_map	ex_get_processor_elem_maps()
ne_put_elem_map	ex_put_processor_elem_maps()

Communications Maps Routines

Nemesis API	Exodus API
ne_get_cmap_params	ex_get_cmap_params()
ne_put_cmap_params	ex_put_cmap_params()
ne_put_cmap_params_cc	ex_put_cmap_params_cc()
ne_get_node_cmap	ex_get_node_cmap()
ne_put_node_cmap	ex_put_node_cmap()
ne_get_elem_cmap	ex_get_elem_cmap()
ne_put_elem_cmap	ex_put_elem_cmap()
ne_get_idx	ex_get_idx()