[svn-r10046] Purpose:

    New feature

Description:
    Allow 3 node redistributions to work on internal nodes.

Platforms tested:
    FreeBSD 4.11 (sleipnir)
    Solaris 2.9 (shanti)

2 files changed, 199 insertions, 6 deletions

diff --git a/src/H5B2.c b/src/H5B2.c
index f5f57a4..ebe0348 100644
--- a/src/H5B2.c
+++ b/src/H5B2.c
@@ -1048,6 +1048,10 @@ H5B2_redistribute3(H5F_t *f, hid_t dxpl_id, unsigned depth, H5B2_internal_t *int
     uint8_t *left_native, *right_native;    /* Pointers to childs' native records */
     uint8_t *middle_native;             /* Pointers to middle child's native records */
     H5B2_shared_t *shared;              /* B-tree's shared info */
+    H5B2_node_ptr_t *left_node_ptrs=NULL, *right_node_ptrs=NULL;/* Pointers to childs' node pointer info */
+    H5B2_node_ptr_t *middle_node_ptrs=NULL;/* Pointers to childs' node pointer info */
+    int left_moved_nrec=0, right_moved_nrec=0; /* Number of records moved, for internal split */
+    int middle_moved_nrec=0;            /* Number of records moved, for internal split */
     herr_t ret_value=SUCCEED;           /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT(H5B2_redistribute3)
@@ -1061,8 +1065,42 @@ H5B2_redistribute3(H5F_t *f, hid_t dxpl_id, unsigned depth, H5B2_internal_t *int
 
     /* Check for the kind of B-tree node to redistribute */
     if(depth>1) {
-HDfprintf(stderr,"%s: redistributing internal node! (need to handle node_ptrs)\n",FUNC);
-HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute records")
+        H5B2_internal_t *left_internal;         /* Pointer to left internal node */
+        H5B2_internal_t *middle_internal;       /* Pointer to middle internal node */
+        H5B2_internal_t *right_internal;        /* Pointer to right internal node */
+
+        /* Setup information for unlocking child nodes */
+        child_class = H5AC_BT2_INT;
+        left_addr = internal->node_ptrs[idx-1].addr;
+        middle_addr = internal->node_ptrs[idx].addr;
+        right_addr = internal->node_ptrs[idx+1].addr;
+
+        /* Lock B-tree child nodes */
+        if (NULL == (left_internal = H5AC_protect(f, dxpl_id, child_class, left_addr, &(internal->node_ptrs[idx-1].node_nrec), internal->shared, H5AC_WRITE)))
+            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")
+        if (NULL == (middle_internal = H5AC_protect(f, dxpl_id, child_class, middle_addr, &(internal->node_ptrs[idx].node_nrec), internal->shared, H5AC_WRITE)))
+            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")
+        if (NULL == (right_internal = H5AC_protect(f, dxpl_id, child_class, right_addr, &(internal->node_ptrs[idx+1].node_nrec), internal->shared, H5AC_WRITE)))
+            HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")
+
+        /* More setup for child nodes */
+        left_child = left_internal;
+        middle_child = middle_internal;
+        right_child = right_internal;
+        left_nrec = &(left_internal->nrec);
+        middle_nrec = &(middle_internal->nrec);
+        right_nrec = &(right_internal->nrec);
+        left_native = left_internal->int_native;
+        middle_native = middle_internal->int_native;
+        right_native = right_internal->int_native;
+        left_node_ptrs = left_internal->node_ptrs;
+        middle_node_ptrs = middle_internal->node_ptrs;
+        right_node_ptrs = right_internal->node_ptrs;
+
+        /* Mark child nodes as dirty now */
+        left_internal->cache_info.is_dirty = TRUE;
+        middle_internal->cache_info.is_dirty = TRUE;
+        right_internal->cache_info.is_dirty = TRUE;
     } /* end if */
     else {
         H5B2_leaf_t *left_leaf;         /* Pointer to left leaf node */
@@ -1127,6 +1165,26 @@ HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute recor
 
             /* Slide records in middle node down */
             HDmemmove(H5B2_NAT_NREC(middle_native,shared,0),H5B2_NAT_NREC(middle_native,shared,moved_middle_nrec),shared->type->nrec_size*(*middle_nrec-moved_middle_nrec));
+
+            /* Move node pointers also if this is an internal node */
+            if(depth>1) {
+                int moved_nrec;         /* Total number of records moved, for internal redistrib */
+                unsigned move_nptrs;    /* Number of node pointers to move */
+                unsigned u;             /* Local index variable */
+
+                /* Move middle node pointers into left node */
+                move_nptrs = new_left_nrec - *left_nrec;
+                HDmemcpy(&(left_node_ptrs[*left_nrec+1]),&(middle_node_ptrs[0]),sizeof(H5B2_node_ptr_t)*move_nptrs);
+
+                /* Count the number of records being moved into the left node */
+                for(u=0, moved_nrec=0; u<move_nptrs; u++)
+                    moved_nrec += middle_node_ptrs[u].all_nrec;
+                left_moved_nrec = moved_nrec+move_nptrs;
+                middle_moved_nrec -= moved_nrec+move_nptrs;
+
+                /* Slide the node pointers in middle node down */
+                HDmemmove(&(middle_node_ptrs[0]),&(middle_node_ptrs[move_nptrs]),sizeof(H5B2_node_ptr_t)*((*middle_nrec-move_nptrs)+1));
+            } /* end if */
         } /* end if */
 
         /* Move records into right node */
@@ -1144,6 +1202,26 @@ HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute recor
 
             /* Move record from middle node up to parent node */
             HDmemcpy(H5B2_INT_NREC(internal,shared,idx),H5B2_NAT_NREC(middle_native,shared,new_middle_nrec),shared->type->nrec_size);
+
+            /* Move node pointers also if this is an internal node */
+            if(depth>1) {
+                int moved_nrec;         /* Total number of records moved, for internal redistrib */
+                unsigned move_nptrs;    /* Number of node pointers to move */
+                unsigned u;             /* Local index variable */
+
+                /* Slide the node pointers in right node up */
+                move_nptrs = new_right_nrec - *right_nrec;
+                HDmemmove(&(right_node_ptrs[move_nptrs]),&(right_node_ptrs[0]),sizeof(H5B2_node_ptr_t)*(*right_nrec+1));
+
+                /* Move middle node pointers into right node */
+                HDmemcpy(&(right_node_ptrs[0]),&(middle_node_ptrs[new_middle_nrec+1]),sizeof(H5B2_node_ptr_t)*move_nptrs);
+
+                /* Count the number of records being moved into the right node */
+                for(u=0, moved_nrec=0; u<move_nptrs; u++)
+                    moved_nrec += right_node_ptrs[u].all_nrec;
+                right_moved_nrec = moved_nrec+move_nptrs;
+                middle_moved_nrec -= moved_nrec+move_nptrs;
+            } /* end if */
         } /* end if */
 
         /* Update # of records in nodes */
@@ -1153,10 +1231,21 @@ HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute recor
     } /* end block */
 
     /* Update # of records in child nodes */
-/* Hmm, this value for 'all_rec' wont' be right for internal nodes... */
-    internal->node_ptrs[idx-1].all_nrec = internal->node_ptrs[idx-1].node_nrec = *left_nrec;
-    internal->node_ptrs[idx].all_nrec = internal->node_ptrs[idx].node_nrec = *middle_nrec;
-    internal->node_ptrs[idx+1].all_nrec = internal->node_ptrs[idx+1].node_nrec = *right_nrec;
+    internal->node_ptrs[idx-1].node_nrec = *left_nrec;
+    internal->node_ptrs[idx].node_nrec = *middle_nrec;
+    internal->node_ptrs[idx+1].node_nrec = *right_nrec;
+
+    /* Update total # of records in child B-trees */
+    if(depth>1) {
+        internal->node_ptrs[idx-1].all_nrec += left_moved_nrec;
+        internal->node_ptrs[idx].all_nrec += middle_moved_nrec;
+        internal->node_ptrs[idx+1].all_nrec += right_moved_nrec;
+    } /* end if */
+    else {
+        internal->node_ptrs[idx-1].all_nrec = internal->node_ptrs[idx-1].node_nrec;
+        internal->node_ptrs[idx].all_nrec = internal->node_ptrs[idx].node_nrec;
+        internal->node_ptrs[idx+1].all_nrec = internal->node_ptrs[idx+1].node_nrec;
+    } /* end else */
 
     /* Mark parent as dirty */
     internal->cache_info.is_dirty = TRUE;
diff --git a/test/btree2.c b/test/btree2.c
index bdeb338..4ba1606 100644
--- a/test/btree2.c
+++ b/test/btree2.c
@@ -1304,6 +1304,109 @@ error:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	test_insert_level2_3internal_redistrib
+ *
+ * Purpose:	Basic tests for the B-tree v2 code.  This test inserts enough
+ *              records to make a level 2 B-tree and then adds enough more
+ *              records to force the left-most and right-most internal nodes to
+ *              split and more records to force a 3 node redistribution of the
+ *              internal nodes.
+ *
+ * Return:	Success:	0
+ *
+ *		Failure:	1
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, February 19, 2005
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+test_insert_level2_3internal_redistrib(hid_t fapl)
+{
+    hid_t	file=-1;
+    char	filename[1024];
+    H5F_t	*f=NULL;
+    hsize_t     record;                 /* Record to insert into tree */
+    haddr_t     bt2_addr;               /* Address of B-tree created */
+    hsize_t     idx;                    /* Index within B-tree, for iterator */
+    unsigned    u;                      /* Local index variable */
+
+    h5_fixname(FILENAME[0], fapl, filename, sizeof filename);
+
+    /* Create the file to work on */
+    if ((file=H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, fapl))<0) TEST_ERROR;
+	
+    /* Get a pointer to the internal file object */
+    if (NULL==(f=H5I_object(file))) {
+	H5Eprint_stack(H5E_DEFAULT, stdout);
+	goto error;
+    }
+
+    /*
+     * Create v2 B-tree 
+     */
+    if (H5B2_create(f, H5P_DATASET_XFER_DEFAULT, H5B2_TEST, 512, 8, 100, 40, &bt2_addr/*out*/)<0) {
+	H5_FAILED();
+	H5Eprint_stack(H5E_DEFAULT, stdout);
+	goto error;
+    }
+
+    /*
+     * Test inserting many records into v2 B-tree 
+     */
+    TESTING("B-tree insert: redistrib 3 internals in level 2 B-tree");
+
+    /* Insert enough records to force root to split into 2 internal nodes */
+    /* Also forces right-most internal node to split */
+    for(u=0; u<(INSERT_SPLIT_ROOT_NREC*21); u++) {
+        record=u+(INSERT_SPLIT_ROOT_NREC*13);
+        if (H5B2_insert(f, H5P_DATASET_XFER_DEFAULT, H5B2_TEST, bt2_addr, &record)<0) {
+            H5_FAILED();
+            H5Eprint_stack(H5E_DEFAULT, stdout);
+            goto error;
+        }
+    }
+
+    /* Force left-most internal node to split */
+    /* Force middle node to perform redistribution */
+    for(u=0; u<INSERT_SPLIT_ROOT_NREC*13; u++) {
+        record=u;
+        if (H5B2_insert(f, H5P_DATASET_XFER_DEFAULT, H5B2_TEST, bt2_addr, &record)<0) {
+            H5_FAILED();
+            H5Eprint_stack(H5E_DEFAULT, stdout);
+            goto error;
+        }
+    }
+
+    /* Iterate over B-tree to check records have been inserted correctly */
+    idx = 0;
+    if(H5B2_iterate(f, H5P_DATASET_XFER_DEFAULT, H5B2_TEST, bt2_addr, iter_cb, &idx)<0) {
+	H5_FAILED();
+	H5Eprint_stack(H5E_DEFAULT, stdout);
+	goto error;
+    }
+
+    /* Make certain that the index is correct */
+    if(idx != (INSERT_SPLIT_ROOT_NREC*34)) TEST_ERROR;
+
+    PASSED();
+
+    if (H5Fclose(file)<0) TEST_ERROR;
+
+    return 0;
+
+error:
+    H5E_BEGIN_TRY {
+	H5Fclose(file);
+    } H5E_END_TRY;
+    return 1;
+} /* test_insert_level2_2internal_split() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	main
  *
  * Purpose:	Test the B-tree v2 code
@@ -1341,6 +1444,7 @@ main(void)
     nerrors += test_insert_level2_leaf_split(fapl);
     nerrors += test_insert_level2_2internal_redistrib(fapl);
     nerrors += test_insert_level2_2internal_split(fapl);
+    nerrors += test_insert_level2_3internal_redistrib(fapl);
 
     if (nerrors) goto error;
     puts("All v2 B-tree tests passed.");