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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...nCommand({replSetStepDown : 1, force : true})
或者使用 rs.stepDown(120)也可以达到同样的效果，中间的数字指不能在停止服务这段时间成为主节点，单位为秒。
设置一个从节点有比主节点有更高的优先级。
先查看当前集群中优先级，通...
Check existence of input argument in a Bash shell script
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2442
It is:
if [ $# -eq 0 ]
then
echo "No arguments supplied"
fi
The $# variable will tell ...
Android Use Done button on Keyboard to click button
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edited Jun 20 '19 at 2:58
Stypox
45777 silver badges1010 bronze badges
answered Mar 7 '12...
Duplicate symbols for architecture x86_64 under Xcode
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Haskell offline documentation?
...lwiki/Hoogle#Command_Line_Search_Flags.
Usage:
$ hoogle --help
Hoogle v4.2.8, (C) Neil Mitchell 2004-2011
http://haskell.org/hoogle
hoogle [COMMAND] ... [OPTIONS]
Commands:
[search] Perform a search
data Generate Hoogle databases
server Start a Hoogle server
combine Combine mu...
Error while installing json gem 'mkmf.rb can't find header files for ruby'
...rn era update, as stated by mimoralea:
In case that you are using ruby 2.0 or 2.2 (thanks @patrick-davey).
sudo apt-get install ruby2.0-dev
sudo apt-get install ruby2.2-dev
sudo apt-get install ruby2.3-dev
or, generic way:
sudo apt-get install ruby-dev
or
sudo apt-get install ruby`r...
What are Java command line options to set to allow JVM to be remotely debugged?
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I have this article bookmarked on setting this up for Java 5 and below.
Basically run it with:
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How to Execute a Python File in Notepad ++?
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20 Answers
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Active
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Differences between fork and exec
... fork
V
+--------+ +--------+
| pid=7 | forks | pid=22 |
| ppid=4 | ----------> | ppid=7 |
| bash | | bash |
+--------+ +--------+
| |
| waits for pid 22 | calls exec to run ls
| V
| ...
Entity Framework 4 Single() vs First() vs FirstOrDefault()
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Here is an overview of the different methods:
Find() - when you want to get an item by prima...