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通过FastCGI Cache实现服务降级 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...，架构图如下：
Degradation
实现的关键点在于通过error_page处理异常，并且完成服务降级：
limit_conn_zone $server_name zone=perserver:1m;
error_page 500 502 503 504 = @failover;
fastcgi_cache_path
/tmp
levels=1:2
keys_zone=failover:100m
i...
Python add item to the tuple
... @SIslam Without the comma, it will just be interpreted as brackets usually used to get around the order of precedence: (a+b)*c
– Joseph Young
Feb 25 '16 at 5:54
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Add list to set?
...rticle. Pythons hashing algorithms are explained on effbot.org and pythons __hash__ function in the python reference.
Some facts:
Set elements as well as dictionary keys have to be hashable
Some unhashable datatypes:
list: use tuple instead
set: use frozenset instead
dict: has no official count...
SecurityException: Permission denied (missing INTERNET permission?)
this error is really really really strange and I don't know how to reproduce it and how to fix it because I made a lot of searches but nothing was useful.
...
Connect to a locally built Jekyll Server using mobile devices in the LAN
...e Jekyll on the command line.
That will make Jekyll's HTTP server bind to all available IPs, rather than just to localhost.
You can also add this to your _config.yml with host: 0.0.0.0. GitHub will simply ignore this when you push, so it's safe to use if you don't mind having your work openly acce...
How to make a JSONP request from Javascript without JQuery?
...cument.createElement('script');
script.src = '//example.com/path/to/jsonp?callback=foo'
document.getElementsByTagName('head')[0].appendChild(script);
// or document.head.appendChild(script) in modern browsers
share
...
Is git not case sensitive?
In the first commitment of my partial called _Electronics it was written beginning with a capital letters, then I changed it to _electronics .
...
LINQ query on a DataTable
...s.Cast<DataRow>().Where(myRow => (int)myRow["RowNo"] == 1). Personally, I don't find the call to AsEnumerable() any more complicated than the call to Cast<DataRow>(). As far as I know, the performance is the same, so it's just a matter of preference.
– Collin K
...
Git Bash doesn't see my PATH
...ecutable names without extensions. In my case, I wanted to execute a file called cup.bat. In a Windows shell, typing cup would be enough. Bash doesn't work this way, it wants the full name. Typing cup.bat solved the problem. (I wasn't able to run the file though, since apparently bash couldn't under...
How can I use Guzzle to send a POST request in JSON?
... edited Aug 18 at 7:06
Valor_
2,49255 gold badges3939 silver badges8787 bronze badges
answered Mar 7 '14 at 8:56
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