X-Git-Url: https://pd.if.org/git/?p=btree;a=blobdiff_plain;f=README.md;h=d24a063ed99e0431073545feb012d99df9893434;hp=691c7b7710e00b0c72fd5712c4046f6330e1a46b;hb=4ae5ba77c29ec5870baa6256f9be8cf4a0fff3bc;hpb=48501624b8372fa9c781c6f89f41b58d91338bb8

diff --git a/README.md b/README.md
index 691c7b7..d24a063 100644
--- a/README.md
+++ b/README.md
@@ -3,22 +3,19 @@ Btree-source-code
 
 A working project for High-concurrency B-tree source code in C
 
-There are three major code sets in the btree source code:
+There are six files in the btree source code:
 
-btree2q.c       Single Threaded/MultiProcess with latching supplied by advisory file locking.  Works with network file systems.
+btree2s.c       Single Threaded/MultiProcess version that removes keys all the way back to an original empty btree, placing removed nodes on a free list.  Operates under either memory mapping or file I/O.  Recommended btrees hosted on network file systems.
 
-threads2h.c     Multi-Threaded/Multi-Process with latching implemented with test & set locks in the btree pages.
+btree2t.c       Single Threaded/MultiProcess version similar to btree2s except that fcntl locking has been replaced by test & set latches in the first few btree pages.  Uses either memory mapping or file I/O.
 
-threads2i.c     Multi-Threaded/Multi-Process with latching implemented with test & set locks in the btree pages with Linux futex system calls for contention.
+btree2u.c		Single Threaded/MultiProcess version that implements a traditional buffer pool manager in the first n pages of the btree file.  The buffer pool accesses its pages with mmap.  Evicted pages are written back to the btree file from the buffer pool pages with pwrite.
 
-The Foster set includes three types of latching:
+threads2h.c     Multi-Threaded/Multi-Process with latching implemented by a latch manager with pthreads/SRW latches in the first few btree pages. Recommended for Windows.
 
-Fosterbtreee.c  Multi-Threaded/Single Process with latches hosted by the buffer pool manager
-
-Fosterbtreef.c  Multi-Threaded/Multi-Process with latches hosted by a latch manager using the first few pages of the btree.
-
-Fosterbtreeg.c  Multi-Threaded/Multi-Process with latches implemented with test & set locks in the btree pages.
+threads2i.c     Multi-Threaded/Multi-Process with latching implemented by a latch manager with test & set latches in the first few btree pages with thread yield system calls during contention.
 
+threads2j.c     Multi-Threaded/Multi-Process with latching implemented by a latch manager with test & set locks in the first few btree pages with Linux futex system calls during contention. Recommended for linux.
 
 Compilation is achieved on linux or Windows by:
 
@@ -26,6 +23,6 @@ gcc -D STANDALONE threads2h.c -lpthread
 
 or
 
-cl /D STANDALONE threads2h.c
+cl /Ox /D STANDALONE threads2h.c
 
-Please see the project wiki page for documentation
+Please see the project wiki page for additional documentation