merge some seq insert code to main. addresses #896

git-svn-id: file:///svn/tokudb@4626 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt-internal.h

@@ -95,6 +95,7 @@ struct brtnode {
 	struct leaf {
 	    OMT buffer;
 	    unsigned int n_bytes_in_buffer; /* How many bytes to represent the OMT (including the per-key overheads, but not including the overheads for the node. */
+            unsigned int seqinsert;         /* number of sequential inserts to this leaf */
 	    struct mempool buffer_mempool;
 	} l;
     } u;

newbrt/brt-serialize.c

@@ -386,6 +386,7 @@ int toku_deserialize_brtnode_from (int fd, DISKOFF off, u_int32_t fullhash, BRTN
     } else {
 	int n_in_buf = rbuf_int(&rc);
 	result->u.l.n_bytes_in_buffer = 0;
+        result->u.l.seqinsert = 0;
 
 	//printf("%s:%d r PMA= %p\n", __FILE__, __LINE__, result->u.l.buffer); 
 	toku_mempool_init(&result->u.l.buffer_mempool, rc.buf, datasize);

newbrt/brt.c

@@ -356,6 +356,7 @@ static void initialize_brtnode (BRT t, BRTNODE n, DISKOFF nodename, int height)
 	//printf("%s:%d n PMA= %p (rcount=%d)\n", __FILE__, __LINE__, n->u.l.buffer, rcount); 
 	rcount++;
 	n->u.l.n_bytes_in_buffer = 0;
+        n->u.l.seqinsert = 0;
     }
 }
 
@@ -1515,9 +1516,19 @@ static int brt_leaf_put_cmd (BRT t, BRTNODE node, BRT_CMD cmd,
 
     switch (cmd->type) {
     case BRT_INSERT:
-	
+        if (node->u.l.seqinsert) {
+            idx = toku_omt_size(node->u.l.buffer);
+            r = toku_omt_fetch(node->u.l.buffer, idx-1, &storeddatav, NULL);
+            if (r != 0) goto fz;
+            storeddata = storeddatav;
+            int cmp = toku_cmd_leafval_bessel(storeddata, &be);
+            if (cmp >= 0) goto fz;
+            r = DB_NOTFOUND;
+        } else {
+        fz:
             r = toku_omt_find_zero(node->u.l.buffer, toku_cmd_leafval_bessel, &be,
                                    &storeddatav, &idx, NULL);
+        }
 	if (r==DB_NOTFOUND) {
 	    storeddata = 0;
 	} else if (r!=0) {
@@ -1528,6 +1539,10 @@ static int brt_leaf_put_cmd (BRT t, BRTNODE node, BRT_CMD cmd,
 	
 	r = brt_leaf_apply_cmd_once(t, node, cmd, logger, idx, storeddata);
 	if (r!=0) return r;
+        if (idx == toku_omt_size(node->u.l.buffer)-1)
+            node->u.l.seqinsert += 1;
+        else
+            node->u.l.seqinsert = 0;
 	break;
     case BRT_DELETE_BOTH:
     case BRT_ABORT_BOTH: