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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...同时读写可能会有IO异常,导致drbd设备失效
为了解决这个问题则使用 gfs + cman 实现分布式文件锁方案
3.3安装cman
yum –y cman
3.4 gfs集群文件系统
在 /usr/local/drbd-utils-8.9.4/etc/drbd.conf
在配置文件的 net 选项中
all...
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...gle稳定，经常会抓不到后面数据通信的网络包，不过这一问题应该是可以通过优化算法得到解决的，但需要对官方的固件进行逆向或自己根据Nordic公司提供的BLE协议栈重写代码。。
优点：
价格便宜，USB Dongle淘宝价70...
How to use clock() in C++
...sure how long your program works. The following functions help measure the CPU time since the start of the program:
C++ (double)clock() / CLOCKS PER SEC with ctime included.
python time.clock() returns floating-point value in seconds.
Java System.nanoTime() returns long value in nanoseconds.
my ...
Which websocket library to use with Node.js? [closed]
...est/response
socketcluster WebSocket server cluster which makes use of all CPU cores on your machine. For example, if you were to use an xlarge Amazon EC2 instance with 32 cores, you would be able to handle almost 32 times the traffic on a single instance.
primus Provides a common API for most of th...
Receiver not registered exception error?
... an exception throwing invalid handler in place because it would cost some CPU cycles to remove it?
– Curmudgeonlybumbly
May 1 '16 at 16:22
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Is there a point to minifying PHP?
...r than what regular PHP allows. The key here is static typing. On a modern CPU, a dynamic language eats branch misprediction penalty left and right. Fact that PHP arrays are hash tables also imposes high cost: lot of branch mispredictions, inefficient use of cache, poor memory prefetching, and no SI...
Is there a good Valgrind substitute for Windows?
... It's not a valgrind replacement (what is really) but it has a new malloc, cpu profiler, heap profiler and checker. Worth a look as it's support on Linux and Windows (inc Mingw) and other unices.
– alexr
Feb 13 '12 at 17:29
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What Computer Science concepts should I know? [closed]
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Systems programming
Understands the entire programming stack, hardware (CPU + Memory + Cache + Interrupts + microcode), binary code, assembly, static and dynamic linking, compilation, interpretation, JIT compilation, garbage collection, heap, stack, memory addressing…
Source Code Version Contr...
Clearing a string buffer/builder after loop
...point of view is not always true. Adding just one line to potentially gain CPU cycles and memory is absolutely not evil. You are taking the idea too straight. Note that a loop is usually repeated many times. A loop can be repeated thousands of times, which can eat precious megabytes on a mobile (and...
How to use wait and notify in Java without IllegalMonitorStateException?
...ile(!JobCompleted); option is generally a bad idea because it ties up your CPU at 100% checking the same variable constantly (see here)
– Matt Lyons
Jun 1 '13 at 21:39
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