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[svn-r10046] Purpose:

Browse Source 
New feature

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

Platforms tested:
    FreeBSD 4.11 (sleipnir)
    Solaris 2.9 (shanti)
This commit is contained in:
Quincey Koziol 2005-02-19 10:32:26 -05:00
parent e0c3218a0a
commit b5b1d7f713
2 changed files with 199 additions and 6 deletions
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101
src/H5B2.c
View File

@ -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;

104
test/btree2.c
View File

@ -1302,6 +1302,109 @@ error:
return 1;
} /* test_insert_level2_2internal_split() */
/*-------------------------------------------------------------------------
* 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
@ -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.");