阿权的书房

[root@aslibra db]# ll -h
total 26G
-rw-r--r-- 1 root root  25G Jun 22 00:12 data.db
-rw-r----- 1 root root  24K Jun 20 19:33 __db.001
-rw-r----- 1 root root 3.8M Jun 20 19:33 __db.002
-rw-r----- 1 root root  81M Jun 20 19:33 __db.003
-rw-r----- 1 root root  96K Jun 20 19:33 __db.004
-rw-r----- 1 root root  11M Jun 20 19:33 __db.005
-rw-r----- 1 root root  48K Jun 20 19:33 __db.006
-rw-r----- 1 root root  10M Jun 21 22:47 log.0000002271
-rw-r----- 1 root root  10M Jun 21 22:47 log.0000002272
-rw-r----- 1 root root  10M Jun 21 22:48 log.0000002273
-rw-r----- 1 root root  10M Jun 21 22:49 log.0000002274
.....

find /BerkeleyDB/aslibra.com/db/ -maxdepth 1 -type f -name 'log.*' -mmin +100 | xargs -i rm -f {}

#!/bin/sh

cd /BerkeleyDB/aslibra.com/db/
ls -t log.* | awk '{ if(NR>100)print $0}'|xargs -i -t rm -f {}

server {
  server_name  b.aslibra.com;
  root    /Data/webapps/b.aslibra.com;
  error_page           404 = @fetch;
  location @fetch {
    internal;
    proxy_store             on;
    proxy_store_access      user:rw  group:rw  all:r;
    proxy_set_header Host a.aslibra.com;
    proxy_set_header referer http://a.aslibra.com/;
    proxy_pass   http://backend;
    root  /Data/webapps/b.aslibra.com;
  }
}

$key=>"http://www.aslibra.com/"
$key."_time"=>time()

$key=>"http://www.aslibra.com/"
$key2=>"http://www.aslibra.com/blog/"
$expire_time=>Num
$expire_time.'_'.Num=>$key
$expire_time.'_'.Num2=>$key2

<?

/****************************************
*** memcachedb_manage version 0.1 @ 2009-6-12
*** code by hqlulu#gmail.com
*** http://www.aslibra.com
*** http://code.google.com/p/memcachedb-manage/
*** http://code.google.com/p/memcachedb/
*** let the memcachedb acts like memcached!
****************************************/

class memcachedb extends Memcache{

  //是否有调试信息
  var $debug = false;
  //兼容使用memcache，这样就不用set时再保存额外数据
  var $is_memcachedb = true;
  //清理时间开始为0时，默认最小的清理时间差
  var $mini_clear_time = 86400;
  //临时数据前缀
  var $prefix = 'db_';
  //临时数据，清理的最后时间戳
  var $last_timeid_key = 'last_timeid';
  
  //本地处理缓存有效性
  var $cache_expire = 900;
  var $cache_prefix = 'WWW_FILE_';
  var $cache_time_prefix = 'WWW_TIME_';

  function memcachedb(){
  }
  
  //改写函数
  //此功能适合前端无法判断数据是否有效的情况，需要自行清理过期数据
  function set($key, $value, $flag=0, $expire=0){

    if($expire>0 && $this->is_memcachedb){
      $mykey = $this->prefix.(time() + $expire);
      //尝试取得自增值
      $i = parent::increment($mykey);
      if($i == FALSE){
        //尝试增加key，防止用set产生的冲突
        $i = parent::add($mykey,1) ? 1 : parent::increment($mykey);
      }
      parent::set($this->mykey($mykey, $i), $key);
    }

    return parent::set($key, $value, $flag, $expire);
  }

  //管理自增的键值组合方式
  function mykey($mykey, $i){
    return $mykey.'_'.$i;
  }

  //保存上次清理的时间戳的键值
  function last_timeid_key(){
    return $this->prefix.$this->last_timeid_key;
  }
  
  //清理
  function clear($start=0, $end=0){

    //取得上次清理的最后时间戳，可以不需要从time_start开始
    $last_timeid = parent::get($this->last_timeid_key());
    if($last_timeid == false) $last_timeid = 0;
    $start = $last_timeid>$start ? $last_timeid : $start;
    $start = $start>0 ? $start : ( time() - $this->mini_clear_time );
    $end = $end>0 ? $end : time();
    if($this->debug)echo " clear $start to $end <br>";

    for($mytime = $start; $mytime<=$end; $mytime++){
      $mykey = $this->prefix.$mytime;
      $auto_id = parent::get($mykey);
      if($auto_id){
        if($this->debug)echo "<hr>clear time: $mytime<br>";
        for($i = 1;$i<=$auto_id;$i++){
          $key = parent::get($this->mykey($mykey, $i));
          if($this->debug)echo " delete ".$k."<br>";
          parent::delete($key);
          if($this->debug)echo " delete ".$this->mykey($mykey, $i)."<br>";
          parent::delete($this->mykey($mykey, $i));
        }
        if($this->debug)echo " delete $mykey<br>";
        parent::delete($mykey);
      }
    }

    //记下当前处理过的时间戳
    $this->set($this->last_timeid_key(), $end);
  }

  //缓存读写
  //此功能适合PHP使用的数据，自行判断数据是否有效的情况
  function get_cache($key, $expire=0){
    $expire = $expire>0 ? $expire : 0;
    if($expire == 0)
      return parent::get($this->cache_prefix.$key);
    $cache_time = parent::get($this->cache_time_prefix.$key);
    $cache_time = $cache_time == FALSE ? 0 : $cache_time;
    if(time() - $cache_time <= $expire)
      return parent::get($this->cache_prefix.$key);
    return FALSE;
  }

  function set_cache($key, $value, $flag=0, $expire=0){
    $expire = $expire>=0 ? $expire : $this->cache_expire;
    parent::set($this->cache_time_prefix.$key, time());
    return parent::set($this->cache_prefix.$key, $value, $flag, $expire);
  }
}
?>

<?
require_once('memcachedb.class.php');

$m = new memcachedb;
$m->connect('192.168.1.5', 11311);

//保存一个300秒有效期的数据
$m->set('test','www.aslibra.com', 0, 300);
//清理到1000秒前到100秒前过期的数据
$m->clear(time()-1000, time()-100);

//获取一个键值，不理会是否过期，相当于get
echo $m->get_cache("test", 0);
//获取一个键值，300秒内保存的才有效
$m->get_cache("test", 300);
//保存一个数据，300秒内有效
$m->set_cache("test", "www.aslibra.com", 0, 300);
//保存一个数据，长期有效，相当于set
$m->set_cache("test", "www.aslibra.com");

//清理到目前已经过期是数据
$m->clear();
?>

# Non-members may check out a read-only working copy anonymously over HTTP.
svn checkout http://memcachedb-manage.googlecode.com/svn/trunk/ memcachedb-manage-read-only

tail -n 20 /var/log/messages | grep named

kernel: audit(1240046511.743:4): avc:  denied  { write } for  pid=5649 comm="named" name="logs" dev=dm-0 ino=778352 scontext=root:system_r:named_t:s0 tcontext=root:object_r:named_conf_t:s0 tclass=dir

... zone myzcom.com/IN/any: loaded serial 2008061100
... running
... zone aslibra.com/IN/any: sending notifies (serial 2008061100)

[root@aslibra etc]# cat config/domain-aslibra.com.any
$TTL 300
@       IN      SOA     ns.aslibra.com. hqlulu.gmail.com. (
                                2008061100 ; serial
                                3600       ; refresh
                                60         ; retry
                                604800     ; expire
                                3600       ; minimum
                                )

                                NS      ns2.aslibra.com.
                                NS      ns.aslibra.com.


www                             A       222.76.215.25
ns                              A       192.168.1.41
ns2                             A       192.168.1.42

[root@localhost etc]# cat config/domain-aslibra.com.any
$ORIGIN .
$TTL 300        ; 5 minutes
aslibra.com             IN SOA  ns.aslibra.com. hqlulu.gmail.com. (
                                2008061100 ; serial
                                3600       ; refresh (1 hour)
                                60         ; retry (1 minute)
                                604800     ; expire (1 week)
                                3600       ; minimum (1 hour)
                                )
                        NS      ns.aslibra.com.
                        NS      ns2.aslibra.com.
$ORIGIN aslibra.com.
ns                      A       192.168.1.41
ns2                     A       192.168.1.42
www                     A       222.76.215.25

[root@aslibra etc]# named-checkconf -t /var/named/chroot/
/etc/config/view-any.conf:13: option 'masters' is not allowed in 'master' zone 'aslibra.com'
[root@aslibra etc]# named-checkconf -t /var/named/chroot/
[root@aslibra etc]#

[root@fetion etc]# named-checkzone -t /var/named/chroot/ aslibra.com /etc/config/domain-aslibra.com.any
zone aslibra.com/IN: loaded serial 2008061100
OK
[root@fetion etc]# named-checkzone aslibra.com /var/named/chroot/etc/config/domain-aslibra.com.any
zone aslibra.com/IN: loaded serial 2008061100
OK

service named reload

wget http://sysoev.ru/nginx/nginx-0.7.59.tar.gz
tar xfz nginx-0.7.59.tar.gz
cd nginx-0.7.59
./configure  --prefix=/Data/apps/nginx \
--with-http_ssl_module \
--with-http_stub_status_module \
--without-mail_pop3_module \
--without-mail_imap_module \
--without-mail_smtp_module \
&& make && make install

#平滑升级可执行程序，使用新的 nginx 可执行程序替换旧的
kill -USR2 `cat /Data/apps/nginx/logs/nginx.pid`
#你可以让旧进程停止工作
kill -QUIT `cat /Data/apps/nginx/logs/nginx.pid.oldbin`
#如果不需要完全停止旧进程，还希望恢复的，你必须发送 WINCH 信号给旧的主进程，然后，它的工作进程就将开始从容关闭
kill -WINCH `cat /Data/apps/nginx/logs/nginx.pid.oldbin`

[root@localhost nginx]# curl -I http://localhost
HTTP/1.1 403 Forbidden
Server: nginx/0.7.59
Date: Wed, 10 Jun 2009 15:04:14 GMT
Content-Type: text/html
Content-Length: 169

[root@aslibra ~]# dig cdl.cdn.aslibra.com
...(省略)
;; ANSWER SECTION:
cdl.cdn.aslibra.com.     683     IN      A       218.25.68.145
cdl.cdn.aslibra.com.     683     IN      A       218.25.68.192
cdl.cdn.aslibra.com.     683     IN      A       218.25.11.105

;; Query time: 6 msec
;; SERVER: 202.106.0.20#53(202.106.0.20)
;; WHEN: Wed Jun 10 16:40:07 2009
;; MSG SIZE  rcvd: 84

[root@aslibra ~]# dig cdl.cdn.aslibra.com +trace
...(省略)
cdl.cdn.aslibra.com.     900     IN      A       60.191.185.162
cdl.cdn.aslibra.com.     900     IN      A       60.191.187.8
...(省略)
;; Received 282 bytes from 61.160.207.67#53(ns1.dnspod.net) in 0 ms