void bc_scan(Bitcask* bc)
{
const char* path = mgr_base(bc->mgr);
char dname[20], hname[20], datapath[255], hintpath[255];
int i=0;
struct stat st;
for (i=0; i<MAX_BUCKET_COUNT; i++) {
sprintf(dname, DATA_FILE, i);
sprintf(datapath, "%s/%s", path, dname);
if (stat(datapath, &st) != 0) {
break;
}
bc->bytes += st.st_size;
sprintf(hname, HINT_FILE, i);
sprintf(hintpath, "%s/%s", path, hname);
if (bc->before == 0){
if (0 == stat(hintpath, &st)){
scanHintFile(bc->tree, i, hintpath, NULL);
}else{
sprintf(hintpath, "%s/%s", mgr_alloc(bc->mgr, hname), hname);
scanDataFile(bc->tree, i, datapath, hintpath);
}
}else{
if (0 == stat(hintpath, &st) &&
(st.st_mtime < bc->before || 0 == stat(datapath, &st) && st.st_mtime < bc->before)){
scanHintFile(bc->tree, i, hintpath, NULL);
}else{
scanDataFileBefore(bc->tree, i, datapath, bc->before);
}
}
}
bc->curr = i;
}
void bc_scan(Bitcask* bc)
{
char datapath[255], hintpath[255];
int i=0;
struct stat st, hst;
skip_empty_file(bc);
const char* base = mgr_base(bc->mgr);
// load snapshot of htree
for (i=MAX_BUCKET_COUNT-1; i>=0; i--)
{
if (stat(gen_path(datapath, base, HTREE_FILE, i), &st) == 0
&& stat(gen_path(hintpath, base, HINT_FILE, i), &hst) == 0
&& st.st_mtime >= hst.st_mtime
&& (bc->before == 0 || st.st_mtime < bc->before))
{
bc->tree = ht_open(bc->depth, bc->pos, datapath);
if (bc->tree != NULL)
{
bc->last_snapshot = i;
break;
}
else
{
fprintf(stderr, "open HTree from %s failed\n", datapath);
mgr_unlink(datapath);
}
}
}
if (bc->tree == NULL)
{
bc->tree = ht_new(bc->depth, bc->pos);
}
for (i=0; i<MAX_BUCKET_COUNT; i++)
{
if (stat(gen_path(datapath, base, DATA_FILE, i), &st) != 0)
{
break;
}
bc->bytes += st.st_size;
if (i <= bc->last_snapshot) continue;
gen_path(hintpath, base, HINT_FILE, i);
if (bc->before == 0)
{
if (0 == stat(hintpath, &st))
{
scanHintFile(bc->tree, i, hintpath, NULL);
}
else
{
scanDataFile(bc->tree, i, datapath,
new_path(hintpath, bc->mgr, HINT_FILE, i));
}
}
else
{
if (0 == stat(hintpath, &st) &&
(st.st_mtime < bc->before || 0 == stat(datapath, &st) && st.st_mtime < bc->before))
{
scanHintFile(bc->tree, i, hintpath, NULL);
}
else
{
scanDataFileBefore(bc->tree, i, datapath, bc->before);
}
}
}
if (i - bc->last_snapshot > SAVE_HTREE_LIMIT)
{
if (ht_save(bc->tree, new_path(datapath, bc->mgr, HTREE_FILE, i-1)) == 0)
{
mgr_unlink(gen_path(NULL, base, HTREE_FILE, bc->last_snapshot));
bc->last_snapshot = i-1;
}
else
{
fprintf(stderr, "save HTree to %s failed\n", datapath);
}
}
bc->curr = i;
}
