Update README.md (pingcap#1581)

README.md

@@ -1,8 +1,63 @@
-# ClickHouse
-ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.
+# TiFlash
 
-🎤🥂 **ClickHouse Meetup in [Sunnyvale](https://www.meetup.com/San-Francisco-Bay-Area-ClickHouse-Meetup/events/248898966/) & [San Francisco](https://www.meetup.com/San-Francisco-Bay-Area-ClickHouse-Meetup/events/249162518/), April 23-27** 🍰🔥🐻
+## Building TiFlash
 
-Learn more about ClickHouse at [https://clickhouse.yandex/](https://clickhouse.yandex/)
+### Prerequisites
 
-[![Build Status](https://travis-ci.org/yandex/ClickHouse.svg?branch=master)](https://travis-ci.org/yandex/ClickHouse)
+- CMake 3.13.2+
+
+### Setup Compiler
+
+- (macOS) Apple Clang 12.0.0
+- (CentOS) GCC 7.3.0
+
+### Install gRPC Systemwise(skip if already have protoc 3.8.x and gRPC 1.26.0 installed)
+
+**You'd better remove any other `protoc` installation except 3.8.x to get a clean build.**
+
+You should use exact gRPC 1.26.0. Refer to gRPC [document](https://github.com/grpc/grpc/blob/master/BUILDING.md) or our test settings [example](https://github.com/pingcap/kvproto/blob/master/.github/workflows/cpp-test.yaml) for how to do it.
+
+### Checkout Source Code
+
+```
+# WORKSPACE
+$ git clone --recursive https://github.com/pingcap/tics.git
+```
+
+### Generate Protos
+
+```
+# WORKSPACE/tics
+$ pushd contrib/kvproto
+$ ./scripts/generate_cpp.sh
+$ popd
+
+$ pushd contrib/tipb
+$ ./generate-cpp.sh
+$ popd
+```
+
+### Build tiflash-proxy
+
+```
+# WORKSPACE/tics
+$ pushd contrib/tiflash-proxy
+$ make release
+$ popd
+$ mkdir -p libs/libtiflash-proxy 
+$ cp contrib/tiflash-proxy/target/release/libtiflash_proxy* libs/libtiflash-proxy
+```
+
+### Build TiFlash
+
+```
+# WORKSPACE/tics
+$ rm -rf build
+$ mkdir -p build
+$ pushd build
+$ cmake .. -DCMAKE_BUILD_TYPE=Debug -DENABLE_TESTS=1 # default build type: RELWITHDEBINFO
+$ make tiflash
+$ popd
+```
+
+Now you will get TiFlash binary under `WORKSPACE/tics/build/dbms/src/Server/tiflash`.