It may be a out-of-date news. Nikon released its first full-frame DSLR D3 in August. You can find a detailed review on
http://www.dpreview.com/previews/nikond3/,
and http://www.kenrockwell.com/nikon/d3.htm.

But you cannot find it in UK yet. It has a lot bigger CMOS sensor(of course, it is full-frame ^_^)

normal sensor

nikon d3’s sensor.

The price in UK will be around £3400!

Tags: cmos sensor, dpreview, dslr, Equipment, kenrockwell, nikon d3, Photography
类别: Photography, Equipment
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Simon cowell - You’re X-factor

My life is terrible.
My love is mess.
I saw an evil.
Of that I’m sure.
He spit at me on the subway.
He was with another girl.

But I won’t lose no sleep on that,
Cause I’ve got a plan

You’re X-factor. You’re X-factor.
You’re X-factor, it’s wrong.
I saw your face in a crowded place,
And I don’t know what to do.
Cause I ‘ll never be with you.

Yeah, he make me ill,
As we walked on by.
He could see from my face that I was,
Fucking sick,
And I don’t think that I’ll see him again,
But we spent a moment that should stop in the beginning.

You’re X-factor, You’re X-factor
You’re X-factor, it’s wrong.
I saw your face in a crowded place,
And I don’t know what to do,
‘Cause I’ll never be with you.

You’re X-factor, You’re X-factor
You’re X-factor, it’s wrong.
There must be an evil with a sick on his face,
When he thought up that I wouldn’t be with you.

But it’s time to face the truth,
I will never be with you.

Tags: Uncategorized
类别: Uncategorized
1 个留言 »

来源：iceblood 作者： 发布时间：2007-04-06
很多人想优化自己的FreeBSD，特别是在网络性能以及内核调整上，因为这些是最直接的优化方式。在这里我收集整理并用中文注释了一下，相信很多人用得到。

#最大的待发送TCP数据缓冲区空间
net.inet.tcp.sendspace=65536

#最大的接受TCP缓冲区空间
net.inet.tcp.recvspace=65536

#最大的接受UDP缓冲区大小
net.inet.udp.sendspace=65535

#最大的发送UDP数据缓冲区大小
net.inet.udp.maxdgram=65535

#本地套接字连接的数据发送空间
net.local.stream.sendspace=65535

#加快网络性能的协议
net.inet.tcp.rfc1323=1
net.inet.tcp.rfc1644=1
net.inet.tcp.rfc3042=1
net.inet.tcp.rfc3390=1

#最大的套接字缓冲区
kern.ipc.maxsockbuf=2097152

#系统中允许的最多文件数量
kern.maxfiles=65536

#每个进程能够同时打开的最大文件数量
kern.maxfilesperproc=32768

#当一台计算机发起TCP连接请求时，系统会回应ACK应答数据包。
#该选项设置是否延迟ACK应答数据包，把它和包含数据的数据包一起发送，
#在高速网络和低负载的情况下会略微提高性能，但在网络连接较差的时候，
#对方计算机得不到应答会持续发起连接请求，反而会降低性能。
net.inet.tcp.delayed_ack=0

#屏蔽ICMP重定向功能
net.inet.icmp.drop_redirect=1
net.inet.icmp.log_redirect=1
net.inet.ip.redirect=0
net.inet6.ip6.redirect=0

#防止ICMP广播风暴
net.inet.icmp.bmcastecho=0
net.inet.icmp.maskrepl=0

#限制系统发送ICMP速率
net.inet.icmp.icmplim=100

#安全参数，编译内核的时候加了options TCP_DROP_SYNFIN才可以用
net.inet.icmp.icmplim_output=0
net.inet.tcp.drop_synfin=1

#设置为1会帮助系统清除没有正常断开的TCP连接，这增加了一些网络带宽的使用，但是一些死掉的连接最终能被识别并清除。死的TCP连接是被拨号用户存取的系统的一个特别的问题，因为用户经常断开modem而不正确的关闭活动的连接
net.inet.tcp.always_keepalive=1

#若看到net.inet.ip.intr_queue_drops这个在增加，就要调大net.inet.ip.intr_queue_maxlen，为0最好
net.inet.ip.intr_queue_maxlen=1000

#防止DOS攻击，默认为30000
net.inet.tcp.msl=7500

#接收到一个已经关闭的端口发来的所有包，直接drop，如果设置为1则是只针对TCP包
net.inet.tcp.blackhole=2

#接收到一个已经关闭的端口发来的所有UDP包直接drop
net.inet.udp.blackhole=1

#为网络数据连接时提供缓冲
net.inet.tcp.inflight.enable=1

#如果打开的话每个目标地址一次转发成功以后它的数据都将被记录进路由表和arp数据表，节约路由的计算时间,但会需要大量的内核内存空间来保存路由表
net.inet.ip.fastforwarding=0

##kernel编译打开options POLLING功能，高负载情况下使用低负载不推荐
##SMP不能和polling一起用
#kern.polling.enable=1

#并发连接数，默认为128，推荐在1024-4096之间，数字越大占用内存也越大
kern.ipc.somaxconn=32768

#禁止用户查看其他用户的进程
security.bsd.see_other_uids=0

#设置kernel安全级别
kern.securelevel=0

#记录下任何TCP连接
net.inet.tcp.log_in_vain=1

#记录下任何UDP连接
net.inet.udp.log_in_vain=1

#防止不正确的udp包的攻击
net.inet.udp.checksum=1

#防止DOS攻击
net.inet.tcp.syncookies=1

#仅为线程提供物理内存支持，需要256兆以上内存
kern.ipc.shm_use_phys=1

# 线程可使用的最大共享内存
kern.ipc.shmmax=67108864

# 最大线程数量
kern.ipc.shmall=32768

# 程序崩溃时不记录
kern.coredump=0

# lo本地数据流接收和发送空间
net.local.stream.recvspace=65536
net.local.dgram.maxdgram=16384
net.local.dgram.recvspace=65536

# 数据包数据段大小，ADSL为1452。
net.inet.tcp.mssdflt=1460

# 为网络数据连接时提供缓冲
net.inet.tcp.inflight_enable=1

# 数据包数据段最小值，ADSL为1452
net.inet.tcp.minmss=1460

# 本地数据最大数量
net.inet.raw.maxdgram=65536

# 本地数据流接收空间
net.inet.raw.recvspace=65536

#ipfw防火墙动态规则数量，默认为4096，增大该值可以防止某些病毒发送大量TCP连接，导致不能建立正常连接
net.inet.ip.fw.dyn_max=65535

#设置ipf防火墙TCP连接空闲保留时间，默认8640000（120小时）
net.inet.ipf.fr_tcpidletimeout=864000

#所有MPSAFE的网络ISR对包做立即响应
net.isr.direct=1

Tags: Computing, freebsd, OS
类别: Computing, OS, FreeBSD
没有留言 »

Im a experienced Linux user, at least I think so. I gained much experience on configuring, fine-tuning Fedora servers from my work which required me to use several Linux servers to host a massive MySQL database and a veeery busy email system. With the increasing of demand, we decided to move from 1and1 (one of the biggest web hosting in Europe) to a self-managed datacenter in Manchester. We have more freedom on what machine and which OS to be used.

From previous experience, Linux’s fat,buggy kernel, low IO, poor FS do annoy me a lot. Look around the Internet, FreeBSD seems be an very good alternative for web server. Actually, I think about it before and never brave enough to use it in a production environment. But this time, I will put my fat ass in front of it ^_^. I totally believe it will work better under a stressed condition than Linux

Tags: 1and1, Computing, datacenter, email system, fedora, freebsd, linux servers, OS, web hosting, web server
类别: Computing, OS
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