RAC集群安装校验输出信息
RAC集群安装校验输出信息
作者:Eric 微信:loveoracle11g [grid@rac-node1 grid]$ [grid@rac-node1 grid]$ ./runcluvfy.sh stage -pre crsinst -fixup -n rac-node1,rac-node2 -verbose Performing pre-checks for cluster services setup Checking node reachability... Check: Node reachability from node "rac-node1" Destination Node Reachable? ------------------------------------ ------------------------ rac-node1 yes rac-node2 yes Result: Node reachability check passed from node "rac-node1" Checking user equivalence... Check: User equivalence for user "grid" Node Name Status ------------------------------------ ------------------------ rac-node2 passed rac-node1 passed Result: User equivalence check passed for user "grid" Checking node connectivity... Checking hosts config file... Node Name Status ------------------------------------ ------------------------ rac-node2 passed rac-node1 passed Verification of the hosts config file successful Interface information for node "rac-node2" Name IP Address Subnet Gateway Def. Gateway HW Address MTU ------ --------------- --------------- --------------- --------------- ----------------- ------ bond0 191.254.8.12 191.254.8.0 0.0.0.0 191.254.8.254 80:18:44:F2:31:78 1500 bond1 10.10.10.12 10.10.10.0 0.0.0.0 191.254.8.254 80:18:44:F2:31:7A 1500 Interface information for node "rac-node1" Name IP Address Subnet Gateway Def. Gateway HW Address MTU ------ --------------- --------------- --------------- --------------- ----------------- ------ bond0 191.254.8.11 191.254.8.0 0.0.0.0 191.254.8.254 80:18:44:F2:20:78 1500 bond1 10.10.10.11 10.10.10.0 0.0.0.0 191.254.8.254 80:18:44:F2:20:7A 1500 Check: Node connectivity of subnet "191.254.8.0" Source Destination Connected? ------------------------------ ------------------------------ ---------------- rac-node2[191.254.8.12] rac-node1[191.254.8.11] yes Result: Node connectivity passed for subnet "191.254.8.0" with node(s) rac-node2,rac-node1 Check: TCP connectivity of subnet "191.254.8.0" Source Destination Connected? ------------------------------ ------------------------------ ---------------- rac-node1:191.254.8.11 rac-node2:191.254.8.12 passed Result: TCP connectivity check passed for subnet "191.254.8.0" Check: Node connectivity of subnet "10.10.10.0" Source Destination Connected? ------------------------------ ------------------------------ ---------------- rac-node2[10.10.10.12] rac-node1[10.10.10.11] yes Result: Node connectivity passed for subnet "10.10.10.0" with node(s) rac-node2,rac-node1 Check: TCP connectivity of subnet "10.10.10.0" Source Destination Connected? ------------------------------ ------------------------------ ---------------- rac-node1:10.10.10.11 rac-node2:10.10.10.12 passed Result: TCP connectivity check passed for subnet "10.10.10.0" Interfaces found on subnet "191.254.8.0" that are likely candidates for VIP are: rac-node2 bond0:191.254.8.12 rac-node1 bond0:191.254.8.11 Interfaces found on subnet "10.10.10.0" that are likely candidates for a private interconnect are: rac-node2 bond1:10.10.10.12 rac-node1 bond1:10.10.10.11 Checking subnet mask consistency... Subnet mask consistency check passed for subnet "191.254.8.0". Subnet mask consistency check passed for subnet "10.10.10.0". Subnet mask consistency check passed. Result: Node connectivity check passed Checking multicast communication... Checking subnet "191.254.8.0" for multicast communication with multicast group "230.0.1.0"... Check of subnet "191.254.8.0" for multicast communication with multicast group "230.0.1.0" passed. Checking subnet "10.10.10.0" for multicast communication with multicast group "230.0.1.0"... Check of subnet "10.10.10.0" for multicast communication with multicast group "230.0.1.0" passed. Check of multicast communication passed. Checking ASMLib configuration. Node Name Status ------------------------------------ ------------------------ rac-node2 passed rac-node1 passed Result: Check for ASMLib configuration passed. Check: Total memory Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 756.1408GB (7.9287112E8KB) 1.5GB (1572864.0KB) passed rac-node1 756.1408GB (7.9287112E8KB) 1.5GB (1572864.0KB) passed Result: Total memory check passed Check: Available memory Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 750.6108GB (7.87072432E8KB) 50MB (51200.0KB) passed rac-node1 750.2176GB (7.86660156E8KB) 50MB (51200.0KB) passed Result: Available memory check passed Check: Swap space Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 64GB (6.710886E7KB) 16GB (1.6777216E7KB) passed rac-node1 64GB (6.710886E7KB) 16GB (1.6777216E7KB) passed Result: Swap space check passed Check: Free disk space for "rac-node2:/tmp" Path Node Name Mount point Available Required Status ---------------- ------------ ------------ ------------ ------------ ------------ /tmp rac-node2 / 231.3164GB 1GB passed Result: Free disk space check passed for "rac-node2:/tmp" Check: Free disk space for "rac-node1:/tmp" Path Node Name Mount point Available Required Status ---------------- ------------ ------------ ------------ ------------ ------------ /tmp rac-node1 / 226.3591GB 1GB passed Result: Free disk space check passed for "rac-node1:/tmp" Check: User existence for "grid" Node Name Status Comment ------------ ------------------------ ------------------------ rac-node2 passed exists(1100) rac-node1 passed exists(1100) Checking for multiple users with UID value 1100 Result: Check for multiple users with UID value 1100 passed Result: User existence check passed for "grid" Check: Group existence for "oinstall" Node Name Status Comment ------------ ------------------------ ------------------------ rac-node2 passed exists rac-node1 passed exists Result: Group existence check passed for "oinstall" Check: Group existence for "dba" Node Name Status Comment ------------ ------------------------ ------------------------ rac-node2 passed exists rac-node1 passed exists Result: Group existence check passed for "dba" Check: Membership of user "grid" in group "oinstall" [as Primary] Node Name User Exists Group Exists User in Group Primary Status ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 yes yes yes yes passed rac-node1 yes yes yes yes passed Result: Membership check for user "grid" in group "oinstall" [as Primary] passed Check: Membership of user "grid" in group "dba" Node Name User Exists Group Exists User in Group Status ---------------- ------------ ------------ ------------ ---------------- rac-node2 yes yes yes passed rac-node1 yes yes yes passed Result: Membership check for user "grid" in group "dba" passed Check: Run level Node Name run level Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 5 3,5 passed rac-node1 5 3,5 passed Result: Run level check passed Check: Hard limits for "maximum open file descriptors" Node Name Type Available Required Status ---------------- ------------ ------------ ------------ ---------------- rac-node2 hard 65536 65536 passed rac-node1 hard 65536 65536 passed Result: Hard limits check passed for "maximum open file descriptors" Check: Soft limits for "maximum open file descriptors" Node Name Type Available Required Status ---------------- ------------ ------------ ------------ ---------------- rac-node2 soft 1024 1024 passed rac-node1 soft 1024 1024 passed Result: Soft limits check passed for "maximum open file descriptors" Check: Hard limits for "maximum user processes" Node Name Type Available Required Status ---------------- ------------ ------------ ------------ ---------------- rac-node2 hard 16384 16384 passed rac-node1 hard 16384 16384 passed Result: Hard limits check passed for "maximum user processes" Check: Soft limits for "maximum user processes" Node Name Type Available Required Status ---------------- ------------ ------------ ------------ ---------------- rac-node2 soft 2047 2047 passed rac-node1 soft 2047 2047 passed Result: Soft limits check passed for "maximum user processes" Check: System architecture Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 x86_64 x86_64 passed rac-node1 x86_64 x86_64 passed Result: System architecture check passed Check: Kernel version Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 2.6.32-696.el6.x86_64 2.6.9 passed rac-node1 2.6.32-696.el6.x86_64 2.6.9 passed Result: Kernel version check passed Check: Kernel parameter for "semmsl" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 250 250 250 passed rac-node1 250 250 250 passed Result: Kernel parameter check passed for "semmsl" Check: Kernel parameter for "semmns" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 32000 32000 32000 passed rac-node1 32000 32000 32000 passed Result: Kernel parameter check passed for "semmns" Check: Kernel parameter for "semopm" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 100 100 100 passed rac-node1 100 100 100 passed Result: Kernel parameter check passed for "semopm" Check: Kernel parameter for "semmni" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 128 128 128 passed rac-node1 128 128 128 passed Result: Kernel parameter check passed for "semmni" Check: Kernel parameter for "shmmax" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 68719476736 68719476736 4294967295 passed rac-node1 68719476736 68719476736 4294967295 passed Result: Kernel parameter check passed for "shmmax" Check: Kernel parameter for "shmmni" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 4096 4096 4096 passed rac-node1 4096 4096 4096 passed Result: Kernel parameter check passed for "shmmni" Check: Kernel parameter for "shmall" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 4294967296 4294967296 2097152 passed rac-node1 4294967296 4294967296 2097152 passed Result: Kernel parameter check passed for "shmall" Check: Kernel parameter for "file-max" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 6815744 6815744 6815744 passed rac-node1 6815744 6815744 6815744 passed Result: Kernel parameter check passed for "file-max" Check: Kernel parameter for "ip_local_port_range" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 between 9000.0 & 65500.0 between 9000.0 & 65500.0 between 9000.0 & 65500.0 passed rac-node1 between 9000.0 & 65500.0 between 9000.0 & 65500.0 between 9000.0 & 65500.0 passed Result: Kernel parameter check passed for "ip_local_port_range" Check: Kernel parameter for "rmem_default" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 262144 262144 262144 passed rac-node1 262144 262144 262144 passed Result: Kernel parameter check passed for "rmem_default" Check: Kernel parameter for "rmem_max" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 4194304 4194304 4194304 passed rac-node1 4194304 4194304 4194304 passed Result: Kernel parameter check passed for "rmem_max" Check: Kernel parameter for "wmem_default" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 262144 262144 262144 passed rac-node1 262144 262144 262144 passed Result: Kernel parameter check passed for "wmem_default" Check: Kernel parameter for "wmem_max" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 1048576 1048576 1048576 passed rac-node1 1048576 1048576 1048576 passed Result: Kernel parameter check passed for "wmem_max" Check: Kernel parameter for "aio-max-nr" Node Name Current Configured Required Status Comment ---------------- ------------ ------------ ------------ ------------ ------------ rac-node2 1048576 1048576 1048576 passed rac-node1 1048576 1048576 1048576 passed Result: Kernel parameter check passed for "aio-max-nr" Check: Package existence for "make" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 make-3.81-23.el6 make-3.80 passed rac-node1 make-3.81-23.el6 make-3.80 passed Result: Package existence check passed for "make" Check: Package existence for "binutils" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 binutils-2.20.51.0.2-5.46.el6 binutils-2.15.92.0.2 passed rac-node1 binutils-2.20.51.0.2-5.46.el6 binutils-2.15.92.0.2 passed Result: Package existence check passed for "binutils" Check: Package existence for "gcc(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 gcc(x86_64)-4.4.7-18.el6 gcc(x86_64)-3.4.6 passed rac-node1 gcc(x86_64)-4.4.7-18.el6 gcc(x86_64)-3.4.6 passed Result: Package existence check passed for "gcc(x86_64)" Check: Package existence for "libaio(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 libaio(x86_64)-0.3.107-10.el6 libaio(x86_64)-0.3.105 passed rac-node1 libaio(x86_64)-0.3.107-10.el6 libaio(x86_64)-0.3.105 passed Result: Package existence check passed for "libaio(x86_64)" Check: Package existence for "glibc(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 glibc(x86_64)-2.12-1.209.el6 glibc(x86_64)-2.3.4-2.41 passed rac-node1 glibc(x86_64)-2.12-1.209.el6 glibc(x86_64)-2.3.4-2.41 passed Result: Package existence check passed for "glibc(x86_64)" Check: Package existence for "compat-libstdc++-33(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 compat-libstdc++-33(x86_64)-3.2.3-69.el6 compat-libstdc++-33(x86_64)-3.2.3 passed rac-node1 compat-libstdc++-33(x86_64)-3.2.3-69.el6 compat-libstdc++-33(x86_64)-3.2.3 passed Result: Package existence check passed for "compat-libstdc++-33(x86_64)" Check: Package existence for "elfutils-libelf(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 elfutils-libelf(x86_64)-0.164-2.el6 elfutils-libelf(x86_64)-0.97 passed rac-node1 elfutils-libelf(x86_64)-0.164-2.el6 elfutils-libelf(x86_64)-0.97 passed Result: Package existence check passed for "elfutils-libelf(x86_64)" Check: Package existence for "elfutils-libelf-devel" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 elfutils-libelf-devel-0.164-2.el6 elfutils-libelf-devel-0.97 passed rac-node1 elfutils-libelf-devel-0.164-2.el6 elfutils-libelf-devel-0.97 passed WARNING: PRVF-7584 : Multiple versions of package "elfutils-libelf-devel" found on node rac-node2: elfutils-libelf-devel(x86_64)-0.164-2.el6,elfutils-libelf-devel(i686)-0.164-2.el6 WARNING: PRVF-7584 : Multiple versions of package "elfutils-libelf-devel" found on node rac-node1: elfutils-libelf-devel(x86_64)-0.164-2.el6,elfutils-libelf-devel(i686)-0.164-2.el6 Result: Package existence check passed for "elfutils-libelf-devel" Check: Package existence for "glibc-common" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 glibc-common-2.12-1.209.el6 glibc-common-2.3.4 passed rac-node1 glibc-common-2.12-1.209.el6 glibc-common-2.3.4 passed Result: Package existence check passed for "glibc-common" Check: Package existence for "glibc-devel(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 glibc-devel(x86_64)-2.12-1.209.el6 glibc-devel(x86_64)-2.3.4 passed rac-node1 glibc-devel(x86_64)-2.12-1.209.el6 glibc-devel(x86_64)-2.3.4 passed Result: Package existence check passed for "glibc-devel(x86_64)" Check: Package existence for "glibc-headers" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 glibc-headers-2.12-1.209.el6 glibc-headers-2.3.4 passed rac-node1 glibc-headers-2.12-1.209.el6 glibc-headers-2.3.4 passed Result: Package existence check passed for "glibc-headers" Check: Package existence for "gcc-c++(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 gcc-c++(x86_64)-4.4.7-18.el6 gcc-c++(x86_64)-3.4.6 passed rac-node1 gcc-c++(x86_64)-4.4.7-18.el6 gcc-c++(x86_64)-3.4.6 passed Result: Package existence check passed for "gcc-c++(x86_64)" Check: Package existence for "libaio-devel(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 libaio-devel(x86_64)-0.3.107-10.el6 libaio-devel(x86_64)-0.3.105 passed rac-node1 libaio-devel(x86_64)-0.3.107-10.el6 libaio-devel(x86_64)-0.3.105 passed Result: Package existence check passed for "libaio-devel(x86_64)" Check: Package existence for "libgcc(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 libgcc(x86_64)-4.4.7-18.el6 libgcc(x86_64)-3.4.6 passed rac-node1 libgcc(x86_64)-4.4.7-18.el6 libgcc(x86_64)-3.4.6 passed Result: Package existence check passed for "libgcc(x86_64)" Check: Package existence for "libstdc++(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 libstdc++(x86_64)-4.4.7-18.el6 libstdc++(x86_64)-3.4.6 passed rac-node1 libstdc++(x86_64)-4.4.7-18.el6 libstdc++(x86_64)-3.4.6 passed Result: Package existence check passed for "libstdc++(x86_64)" Check: Package existence for "libstdc++-devel(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 libstdc++-devel(x86_64)-4.4.7-18.el6 libstdc++-devel(x86_64)-3.4.6 passed rac-node1 libstdc++-devel(x86_64)-4.4.7-18.el6 libstdc++-devel(x86_64)-3.4.6 passed Result: Package existence check passed for "libstdc++-devel(x86_64)" Check: Package existence for "sysstat" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 sysstat-9.0.4-33.el6 sysstat-5.0.5 passed rac-node1 sysstat-9.0.4-33.el6 sysstat-5.0.5 passed Result: Package existence check passed for "sysstat" Check: Package existence for "pdksh" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 pdksh-5.2.14-30 pdksh-5.2.14 passed rac-node1 pdksh-5.2.14-30 pdksh-5.2.14 passed Result: Package existence check passed for "pdksh" Check: Package existence for "expat(x86_64)" Node Name Available Required Status ------------ ------------------------ ------------------------ ---------- rac-node2 expat(x86_64)-2.0.1-13.el6_8 expat(x86_64)-1.95.7 passed rac-node1 expat(x86_64)-2.0.1-13.el6_8 expat(x86_64)-1.95.7 passed Result: Package existence check passed for "expat(x86_64)" Checking for multiple users with UID value 0 Result: Check for multiple users with UID value 0 passed Check: Current group ID Result: Current group ID check passed Starting check for consistency of primary group of root user Node Name Status ------------------------------------ ------------------------ rac-node2 passed rac-node1 passed Check for consistency of root user's primary group passed Starting Clock synchronization checks using Network Time Protocol(NTP)... NTP Configuration file check started... Network Time Protocol(NTP) configuration file not found on any of the nodes. Oracle Cluster Time Synchronization Service(CTSS) can be used instead of NTP for time synchronization on the cluster nodes No NTP Daemons or Services were found to be running Result: Clock synchronization check using Network Time Protocol(NTP) passed Checking Core file name pattern consistency... Core file name pattern consistency check passed. Checking to make sure user "grid" is not in "root" group Node Name Status Comment ------------ ------------------------ ------------------------ rac-node2 passed does not exist rac-node1 passed does not exist Result: User "grid" is not part of "root" group. Check passed Check default user file creation mask Node Name Available Required Comment ------------ ------------------------ ------------------------ ---------- rac-node2 0022 0022 passed rac-node1 0022 0022 passed Result: Default user file creation mask check passed Checking consistency of file "/etc/resolv.conf" across nodes Checking the file "/etc/resolv.conf" to make sure only one of domain and search entries is defined File "/etc/resolv.conf" does not have both domain and search entries defined Checking if domain entry in file "/etc/resolv.conf" is consistent across the nodes... domain entry in file "/etc/resolv.conf" is consistent across nodes Checking if search entry in file "/etc/resolv.conf" is consistent across the nodes... search entry in file "/etc/resolv.conf" is consistent across nodes Checking DNS response time for an unreachable node Node Name Status ------------------------------------ ------------------------ rac-node2 failed rac-node1 failed PRVF-5636 : The DNS response time for an unreachable node exceeded "15000" ms on following nodes: rac-node2,rac-node1 File "/etc/resolv.conf" is not consistent across nodes Check: Time zone consistency Result: Time zone consistency check passed Pre-check for cluster services setup was unsuccessful on all the nodes. [grid@rac-node1 grid]$
RAC集群安装校验输出信息的更多相关文章
- 安装ORACLE高可用RAC集群11g校验集群安装的可行性输出信息
安装ORACLE高可用RAC集群11g校验集群安装的可行性输出信息 作者:Eric 微信:loveoracle11g [grid@node1 grid]$ ./runcluvfy.sh stage - ...
- 转载:【Oracle 集群】RAC知识图文详细教程(七)--Oracle 11G RAC集群安装
文章导航 集群概念介绍(一) ORACLE集群概念和原理(二) RAC 工作原理和相关组件(三) 缓存融合技术(四) RAC 特殊问题和实战经验(五) ORACLE 11 G版本2 RAC在LINUX ...
- Oracle 12cR1 RAC集群安装(一)--环境准备
基本环境 操作系统版本 RedHat6.7 数据库版本 12.1.0.2 数据库名称 testdb 数据库实例 testdb1.testdb2 (一)安装服务器硬件要求 配置项目 参数要求 网卡 每台 ...
- Oracle 12cR1 RAC集群安装(二)--使用图形界面安装
Oracle 12cR1 RAC集群安装文档:Oracle 12cR1 RAC集群安装(一)--环境准备Oracle 12cR1 RAC集群安装(二)--使用图形界面安装Oracle 12cR1 RA ...
- Oracle 10G RAC集群安装
一,基本环境配置 01,hosts cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.loc ...
- Oracle RAC集群安装之:Grid软件安装过程蓝屏
前几天在安装一套RAC服务器的过程中,遇到了蓝屏事件,折腾了蛮久(在排查是否存在硬件问题上花费了相当多一部分时间),整个过程大概说明如下: 1.两台华为的PC SERVER,操作系统为WIN SERV ...
- 【Oracle 集群】Oracle 11G RAC教程之集群安装(七)
Oracle 11G RAC集群安装(七) 概述:写下本文档的初衷和动力,来源于上篇的<oracle基本操作手册>.oracle基本操作手册是作者研一假期对oracle基础知识学习的汇总. ...
- 【转】【Oracle 集群】Oracle 11G RAC教程之集群安装(七)
原文地址:http://www.cnblogs.com/baiboy/p/orc7.html 阅读目录 目录 集群安装 参考文献 相关文章 Oracle 11G RAC集群安装(七) 概述:写下本文档 ...
- 【Oracle 集群】Linux下Oracle RAC集群搭建之Oracle DataBase安装(八)
Oracle 11G RAC数据库安装(八) 概述:写下本文档的初衷和动力,来源于上篇的<oracle基本操作手册>.oracle基本操作手册是作者研一假期对oracle基础知识学习的汇总 ...
随机推荐
- pnpm 快速节省磁盘工具的包管理工具
nodejs 相关的包管理工具有很多,我们常用的有 npm cnpm(我基本已经不用了),yarn... pnpm 是另外一个不错的包管理工具,包含以下特性 快速 节省空间,一个版本的包只会在磁盘中存 ...
- DevExpress Cpicturebox或者Dev控件 PictureEdit 按比例的缩放加载图片
方法一: 如果要加载的图片的长宽比不是太过失衡, 1.可以改变picturebox的SizeMode属性为 PictureBoxSizeMode.StretchImage, 2.或者Dev控件 ...
- fork和exec
fork pid_t fork(void); 它在调用进程(成为父进程)中返回一次,返回值为新派生进程(成为子进程)的进程ID号 在子进程中又返回一次,返回值为0.因此,返回值本身告知当前进程是子进程 ...
- 著名软件工程师与作家、极限编程的创始者、JUnit作者之Kent Beck
Kent Beck,1961年出生,中文名肯特贝克,美国著名软件工程师与作家,在软件工程方面有很大的贡献.他是Smalltalk软件的开发者,设计模式的先驱,测试驱动开发的支持者,也是极限编程的创始者 ...
- linux 查看tcp数量
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
- uglifyjs-webpack-plugin 插件,drop_console 默认为 false(不清除 console 语句),drop_debugger 默认为 true(清除 debugger 语句)
uglifyjs-webpack-plugin 插件,drop_console 默认为 false(不清除console语句),drop_debugger 默认为 true(清除 debugger 语 ...
- Logstash的grok以及Ruby
logstash的grok插件的用途是提取字段,将非格式的内容进行格式化, input { file { path => "/var/log/http.log" } } fi ...
- Spring整合Hibernate(转)
概述 Spring整合Hibernate有什么好处? 1.由IOC容器来管理Hibernate的SessionFactory 2.让Hibernate使用上Spring的声明式事务 整合步骤 整合前准 ...
- C# 虚方法、override和new
使用new关键字来做调用 using System; using System.Collections.Generic; using System.Linq; using System.Text; u ...
- 【java】类的初识
面向过程思想:强调的是功能行为 面向对象思想:不自己亲自做,将功能封装为对象,强调具备功能的对象,指挥对象实现各种功能.以后开发实际就是找对象使用对象,要是对象没有就创建对象并维护对象. 面向对象的三 ...