From 778887c41d7d379c7dba158ecf46ef03a25fa6ba Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=9B=8F=E4=B8=80?= <w@hidva.com>
Date: Fri, 16 Apr 2021 00:06:19 +0800
Subject: [PATCH] update ROADMAP

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index a624a48..a0bb463 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,11 @@
     kuiba=!# commit;
     ROLLBACK
     ```
+-   [ ] Implement PG-style shared buffer: `SharedBuf<K: Copy, V, E: EvictPolicy>`.
+
+    `SharedBuf<TableId, SuperVersion, LRUPolicy>` will be used to save the mapping between the table and its SuperVersion. In RocksDB, SuperVersion of ColumnFamily is memory resident. but OLAP system may have many tables, we should support swapping the SuperVersion of some infrequently used tables out to disk.
+
+    `SharedBuf<PageId, Page, FIFOPolicy>` will be used to save the xmin/xmax/hints page for table file.
 
 -   [ ] Add columnar storage