生成distribution的gnode节点信息文件。集群安装成功后，执行安装操作命令的节点上，在安装包目录下，会生成一个gcChangeInfo.xml文件。该文件为xml格式，其根标签为<servers>，描述生成distribution的gnode节点信息；子标签为<rack>，即机架，描述的是机架与gnode节点对应关系。安装后生的gcChangeInfo.xml中仅有一个<rack>，其中包含集群中的所有gnode节点信息，在使用pattern 1模式生成distribution时，可按机器部署情况插入多个<rack>标签，将gnode节点信息插入到对应的<rack>标签下。

1、获取产品版本安装文件
2、执行安装命令：

./gcinstall.py --silent=demo.options

3、配置distribution：

gcadmin distribution gcChangeInfo.xml p 3 d 1

4、集群初始化：

initnodedatamap

利用脚本，获取堆栈信息，方法如下：

sh ./core_stack /opt/gnode/server/bin/gbased opt/gnode/userdata/gbase/core.xxx  > file

文件名请记录节点信息，对应的core文件pid，时间等信息，以方便对照，例如bt_node17_pid_20160531.txt。

core_stack.sh
#!/bin/sh
gdb –quiet -nx $1 $2 <<EOF 2>&1
set width 0
set height 0
set pagination no
thread apply all bt
EOF

gbase命令行工具中支持通过system关键字的方式调用操作系统命令，用于更改当前路径、查看系统变量、查看文本内容。
命令格式为：system linux_os_cmd

例如：

gbase> system gcadmin

  CLUSTER STATE:  ACTIVED
  CLUSTER MODE:   NORMAL

+==========================================================================================================================+
|                                                   GCLUSTER INFORMATION                                                   |
+==========================================================================================================================+
+-------+----------+-----------------+--------+--------+---------+---------+----------+------------+-----------+-----------+
| rowid | nodename |    IpAddress    | sgname | dpname | gcware  |  gnode  | gcluster | syncserver | datastate | nodestate |
+-------+----------+-----------------+--------+--------+---------+---------+----------+------------+-----------+-----------+
|   1   |   node1  | 192.168.105.210 |  sg01  |   n1   | Online  |  OPEN   |   OPEN   |    OPEN    |  [0]      |  [0]      |
+-------+----------+-----------------+--------+--------+---------+---------+----------+------------+-----------+-----------+
|   2   |   node2  | 192.168.105.211 |  sg01  |   n2   | Online  |  OPEN   |   OPEN   |    OPEN    |  [0]      |  [0]      |
+-------+----------+-----------------+--------+--------+---------+---------+----------+------------+-----------+-----------+
|   3   |   node3  | 192.168.105.212 |  sg02  |   n3   | Online  |  OPEN   |   OPEN   |    OPEN    |  [1]      |  [0]      |
+-------+----------+-----------------+--------+--------+---------+---------+----------+------------+-----------+-----------+
|   4   |   node4  | 192.168.105.213 |  sg02  |   n4   | Online  |  OPEN   |   OPEN   |    OPEN    |  [0]      |  [0]      |
+-------+----------+-----------------+--------+--------+---------+---------+----------+------------+-----------+-----------+

gbase> system pwd
/home/gbase
gbase> system cat tab1.txt1
1,,2015-03-19 17:51:31
2,abc,2015-03-19 17:51:43