[t:4133] Candidate #4133 (set version to 16).

git-svn-id: file:///svn/toku/tokudb@36855 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt-serialize.c

@@ -1825,6 +1825,7 @@ serialize_brt_header_min_size (u_int32_t version) {
 
 
     switch(version) {
+        case BRT_LAYOUT_VERSION_16:
         case BRT_LAYOUT_VERSION_15:
             size += 4;  // basement node size
             size += 8;  // num_blocks_to_upgrade_14 (previously num_blocks_to_upgrade, now one int each for upgrade from 13, 14
@@ -2218,7 +2219,8 @@ deserialize_brtheader_versioned (int fd, struct rbuf *rb, struct brt_header **br
             case BRT_LAYOUT_VERSION_14:
                 h->basementnodesize = 128*1024;  // basement nodes added in v15
                 //fall through on purpose
-            case BRT_LAYOUT_VERSION_15:
+            case BRT_LAYOUT_VERSION_16:
+            case BRT_LAYOUT_VERSION_15: // this may no properly support version 15, we'll fix that on upgrade.
                 invariant(h->layout_version == BRT_LAYOUT_VERSION);
                 h->upgrade_brt_performed = FALSE;
                 if (upgrade) {

newbrt/brt_layout_version.h

@@ -19,6 +19,7 @@ enum brt_layout_version_e {
     BRT_LAYOUT_VERSION_13 = 13, // Diff from 12 to 13: Fixed loader pivot bug, added build_id to every node, timestamps to brtheader 
     BRT_LAYOUT_VERSION_14 = 14, // Diff from 13 to 14: Added MVCC; deprecated TOKU_DB_VALCMP_BUILTIN(_13); Remove fingerprints; Support QUICKLZ; add end-to-end checksum on uncompressed data.
     BRT_LAYOUT_VERSION_15 = 15, // Diff from 14 to 15: basement nodes, last verification time
+    BRT_LAYOUT_VERSION_16 = 16, // Dr. No:  No subtree estimates, partition layout information represented more transparently. 
     BRT_NEXT_VERSION,           // the version after the current version
     BRT_LAYOUT_VERSION   = BRT_NEXT_VERSION-1, // A hack so I don't have to change this line.
     BRT_LAYOUT_MIN_SUPPORTED_VERSION = BRT_LAYOUT_VERSION_13, // Minimum version supported