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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...作的位置在文件系统的buffer cache和磁盘调度器之间，通过tcp/ip发给另外一台主机到对方的tcp/ip最终发送给对方的drbd，再由对方的drbd存储在本地对应磁盘 上，类似于一个网络RAID-1功能。在高可用(HA)中使用DRBD功能，可以代替使用...
动态追踪（Dynamic Tracing）技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...置一系列临时的防火墙规则，以屏蔽用户流量或者自己的监控流量，然后在生产机上各种折腾。这是很繁琐影响很大的过程。首先它会让机器不能再继续服务，降低了整个在线系统的总的吞吐能力。同时有些只有真实流量才能复...
In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
...data can be both sent from and to a generator.
(If we were talking about TCP, yield from g might mean "now temporarily disconnect my client's socket and reconnect it to this other server socket".)
BTW, if you are not sure what sending data to a generator even means, you need to drop everything an...
How does HTTP file upload work?
...uickly take turns downloading packets of data from connections. Rather, in TCP/IP, port 80 is a listening port, not the port the data is transferred on.
– slebetman
Oct 13 '14 at 17:08
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What does enctype='multipart/form-data' mean?
..., via the HTTP protocol, a message on the network, properly enveloped in a TCP/IP protocol message structure. An HTML page has a way to send data to the server: by using <form>s.
When a form is submitted, an HTTP Request is created and sent to the server, the message will contain the field n...
Ruby on Rails Server options [closed]
...ation which:
Loads your Ruby app inside its own process space.
Sets up a TCP socket, allowing it to communicate with the outside world (e.g. the Internet).
Mongrel listens for HTTP requests on this socket and passes the request data to the Ruby web app.
The Ruby web app then returns an object, w...
Please explain the exec() function and its family
...s was used quite a lot (and still is) for daemons which simply listen on a TCP port and fork a copy of themselves to process a specific request while the parent goes back to listening. For this situation, the program contains both the parent and the child code.
Similarly, programs that know they're ...
How to create a new database after initally installing oracle database 11g Express Edition?
...ho diagnostic_dest=%db_dir%>>%init_file%
echo dispatchers='(protocol=tcp) (service=%app_name%xdb)'>>%init_file%
echo shared_servers=4>>%init_file%
echo open_cursors=300>>%init_file%
echo remote_login_passwordfile='exclusive'>>%init_file%
echo undo_management=auto>>...
Is async HttpClient from .Net 4.5 a bad choice for intensive load applications?
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I have found exactly the same issue creating TCP port exhaustion on the client. The solution was to lease the HttpClient instance for long periods of time where iterative calls were being made, not create and dispose for each call. The conclusion I reached was "Just bec...
How to design a multi-user ajax web application to be concurrently safe
...led with lower memory consumption. I think a node.js server and relying on TCP WebSockets really helps with scaling. It completely ruins cross browser compliance though.
– Raynos
Feb 17 '11 at 17:19
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