参考了DevNet 和
Chinaunix.net 的讨论,用以下代码简单实现单子模式(SINGLETON):
|
参考了DevNet 和
Chinaunix.net 的讨论,用以下代码简单实现单子模式(SINGLETON):
|
看了这篇文章:配置 Apache 强行指定浏览器编码选择 ,俺也有些感想:
apache 2的配置文件中,AddDefaultCharset缺省是ISO-8859-1,所以很多人刚开始用的时候会把它改成GB2312,这样就可以避免乱码问题.
我也推荐人家用这个解决办法在一段时间里,直到有一次看到一个UTF-8编码的页面,始终是乱码,无可救药的乱码,任你如何调整浏览器的设置.无奈之下我把AddDefaultCharset那行整个屏蔽了,突然发现所有UTF-8页面恢复了正常,真的好神奇耶!!
从此,我深深的认识到:在AddDefaultCharset被屏蔽的情况下,页面的编码是由<meta>标记决定的.
如下:
I have recently had success setting up a MySQL Cluster, so I thought I’d share what I did with everyone since it was such a challenge for me to do and the documentation for how to set it up is so poor. |
######################### My Setup #################################### Here is my setup: I have two machines, Machine A and Machine B, that have requests and updates to the db balanced by a router. There is one IP address that clients use to access the db. The router distributes 50% of the requests to Machine A and the remaining 50% to Machine B. Therefore, the db on both Machine A and Machine B must be exactly the same at all times. To achieve this I used MySQL Cluster. I am running Redhat Linux 9 on both machines, and the machines are physically identical. Machine A ip = 10.0.2.39 Machine B ip = 10.0.2.38 ########################### Installing ################################ I did the following on both machines: - I installed MySql-Max (Linux (x86, glibc-2.2, static, gcc) 4.1.7 http://dev.mysql.com/get/Downloads/MySQL-4.1/mysql-max-4.1.7-pc-linux-i6 86.tar.gz/from/pick - I extracted the tar file into the root folder, and installed the mysql db by running the mysql_install_db script in the scripts directory. (In the mysql directory type- ./scripts/mysql_install_db) - I then created a config.ini file which I placed in the mysql directory. I also created a my.cnf file which I placed in the mysql/data directory. ################### Config.ini ####################################### [NDBD DEFAULT] NoOfReplicas= 2 [MYSQLD DEFAULT] [NDB_MGMD DEFAULT] [TCP DEFAULT] [NDB_MGMD] HostName= 10.0.2.39 (10.0.2.38 on machine B) [NDBD] HostName= 10.0.2.38 DataDir= /root/mysql/data [NDBD] HostName= 10.0.2.39 DataDir= /root/mysql/data [MYSQLD] [MYSQLD] [MYSQLD] ###################### My.cnf ########################## The my.cnf file on both machines is: [mysqld] ndbcluster ###################### Starting the cluster ############# To start the cluster I did the following: (please note that MySQL is installed in the /root/mysql directory) Machine A: - opened a terminal. - typed- cd mysql - typed- ./bin/ndb_mgmd - starts the cluster manager - typed- ./bin/ndbd --initial - please note, only use the '--initial' parameter if it is the first time you are starting the node. - typed- ./bin/mysqld_safe --user=root & - starts mysql. The terminal may stick here so use ctrl-c to get a new prompt. - typed- ./bin/mysql - starts the mysql monitor. - typed- use test; - to use the test database. Machine B: - follow the same steps as Machine A: ###################### Testing the cluster ############# On Machine A: - at the mysql monitor prompt - type- use test; - to use the test database. - type- create table cluster_test (i int) engine=ndbcluster; - this should create a clustered table called cluster_test. On Machine B: - at the mysql monitor prompt - type- use test; - type- show tables; - this should show the cluster_test table created on Machine A. Inserting Subsequent inserts etc. can be done at the mysql monitor prompt. Example: On Machine A: - type- insert into cluster_test values(314159); On Machine B: - type- select * from cluster_test; - should display the value 314159. ##########################################################
今天给同一虚拟主机添加了两个端口,过程如下:[@more@]
今天给同一虚拟主机添加了两个端口,过程如下:
绑定端口为:80,8080
1.在httpd.conf中添加:
Listen 8080
2.复制原虚拟主机配置
以下是代码片段:
<VirtualHost *:80> ….. </VirtualHost> |
添加:
以下是代码片段:
<VirtualHost *:8080> ….. </VirtualHost> |
但是实际上有更简化的写法:
以下是代码片段:
<VirtualHost *:80 *:8080> ….. </VirtualHost> |
重启apache观察配置是否生效
Apache中目录的Option设置为Indexes后,文件和文件夹将列表出来,其中有一项是‘描述’
Description的,这个属性可以对文件进行一些描述,但是如何赋值呢?