checkpoint

Author: TheAssembler1

src/server/pdc_server_region/include/pdc_server_region_transfer.h

@@ -3,23 +3,46 @@
 
 #include "pdc_region.h"
 
+typedef enum pdc_region_writeout_strategy {
+    /**
+     * Store data as multiple regions inside a single file.
+     * Overlapping writes that are not fully contained append new regions
+     * to the end of the file, with metadata tracking region locations.
+     * Supports incremental updates without rewriting large parts of the file.
+     */
+    STORE_REGION_BY_REGION_SINGLE_FILE = 0,
+
+    /**
+     * Store the entire object as a single flat file.
+     * Reads and writes operate by seeking directly within the file.
+     * No region metadata bookkeeping; simpler but less flexible for partial updates.
+     */
+    STORE_FLATTENED_SINGLE_FILE,
+
+    /**
+     * Store each flattened region in its own separate file.
+     * Enables independent file management per region.
+     */
+    STORE_FLATTENED_REGION_PER_FILE
+} pdc_region_writeout_strategy;
+
 typedef struct transfer_request_all_data {
     uint64_t **obj_dims;
     uint64_t **remote_offset;
     uint64_t **remote_length;
-    pdcid_t *  obj_id;
-    int *      obj_ndim;
-    size_t *   unit;
-    int *      remote_ndim;
-    char **    data_buf;
+    pdcid_t   *obj_id;
+    int       *obj_ndim;
+    size_t    *unit;
+    int       *remote_ndim;
+    char     **data_buf;
     int        n_objs;
 } transfer_request_all_data;
 
 typedef struct pdc_transfer_request_status {
     hg_handle_t                         handle;
     uint64_t                            transfer_request_id;
     uint32_t                            status;
-    int *                               handle_ref;
+    int                                *handle_ref;
     int                                 out_type;
     struct pdc_transfer_request_status *next;
 } pdc_transfer_request_status;