2015-12-13 17 views
0

我想为我的Django 1.8.5(在python3)网站上使用memcached。python3的Django memcached库

目前我已经尝试过pylibmc和python-memcached。

pylibmc给了我这个错误

libmemcached/get.cc:87 Assertion "ptr->query_id == query_id +1" failed for function "memcached_get_by_key" likely for "Programmer error, the query_id was not incremented." 
Number of stack frames obtained: 24 
    /usr/lib/x86_64-linux-gnu/libmemcached.so.10 : memcached_get_by_key()+0x283 
    /usr/lib/x86_64-linux-gnu/libmemcached.so.10 : memcached_get()+0x1f 
    /home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/_pylibmc.cpython-34m.so :()+0x61fd 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalFrameEx()+0x3f6a 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalCodeEx()+0x15b 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalFrameEx()+0x4490 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalCodeEx()+0x15b 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalFrameEx()+0x4490 
/home/francesco/virtualenvs/TeamCompSite/bin/python() [0x56a7ec] 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyObject_Call()+0x3a 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalFrameEx()+0x1e2f 
/home/francesco/virtualenvs/TeamCompSite/bin/python() [0x56a7ec] 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyObject_Call()+0x3a 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalFrameEx()+0x1e2f 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalFrameEx()+0x403d 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_EvalFrameEx()+0x403d 
/home/francesco/virtualenvs/TeamCompSite/bin/python() [0x56a7ec] 
/home/francesco/virtualenvs/TeamCompSite/bin/python() [0x4e21bd] 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyObject_Call()+0x3a 
    /home/francesco/virtualenvs/TeamCompSite/bin/python : PyEval_CallObjectWithKeywords()+0x36 
/home/francesco/virtualenvs/TeamCompSite/bin/python() [0x5be452] 
    /lib/x86_64-linux-gnu/libpthread.so.0 :()+0x8182 
    /lib/x86_64-linux-gnu/libc.so.6 : clone()+0x6d 

看起来像一个非常罕见的事情,如找对谷歌我只找到pylibmc: 'Assertion "ptr->query_id == query_id +1" failed for function "memcached_get_by_key"'

不幸的是我不能改变Django是如何处理的memcached lib中。

然后我试了python-memcached

这次我得到了

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7f00537e9f28> 
Traceback (most recent call last): 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/django/utils/autoreload.py", line 229, in wrapper 
    fn(*args, **kwargs) 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/django/core/management/commands/runserver.py", line 107, in inner_run 
    autoreload.raise_last_exception() 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/django/utils/autoreload.py", line 252, in raise_last_exception 
    six.reraise(*_exception) 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/django/utils/six.py", line 658, in reraise 
    raise value.with_traceback(tb) 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/django/utils/autoreload.py", line 229, in wrapper 
    fn(*args, **kwargs) 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/django/__init__.py", line 18, in setup 
    apps.populate(settings.INSTALLED_APPS) 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/django/apps/registry.py", line 115, in populate 
    app_config.ready() 
    File "/media/francesco/A6528DA1528D76B9/Programmazione/Python/Spark/team_comp_site/teamcomp/apps.py", line 19, in ready 
    client.get_stats() 
    File "/home/francesco/virtualenvs/TeamCompSite/lib/python3.4/site-packages/memcache.py", line 338, in get_stats 
    stats = line.split(' ', 2) 
TypeError: 'str' does not support the buffer interface 

看起来像蟒蛇,memcached的只支持python2(我的坏手之前不检查)

让我们尝试python3-memcached的

该网站负荷!

只是为了告诉我熟悉的错误页面

Exception Value: local variable 'val' referenced before assignment 

Exception Location:  /home/xxxxx/virtualenvs/xxxx/lib/python3.4/site-packages/memcache.py in _recv_value, line 1026 
Python Executable: /home/xxxxx/virtualenvs/xxxxx/bin/python 
Python Version:  3.4.3 

那么,什么是python3(。4)memcached的客户选择呢?

回答

0

使用python3-memcached只是触发一个更干净的字符串和字节缓冲区管理。

在python2的unicode字符串中,字节数组和字符串是ascii或链的\uXXXX个字符。 ascii字符串到bytestring之间的转换是安静的,但是从bytestring到stringexplicite。

在python3:unicode类型不再存在。你只需要str,并且只有bytearray。由于这一切都必须是明确的,所以一切都是可以预测的。 python-memcached库被重新开发以适应这种新的和更简单的方式来处理py3中的字符串。