[Kimchi-devel] [PATCH] issue #325: Use RamSession instead of FileSession

[Shu Ming]

  2014/2/25 23:22, Adam King:
>
> On 2/25/2014 8:42 AM, Sheldon wrote:
>> Not sure RamSession is a good choice.
> What are your concerns with RamSession?
>
>>
>> What's the different between MemcachedSession and RamSession.
> Memcached is a distributed memory cache: 
> http://en.wikipedia.org/wiki/Memcached
> which seems like overkill given that we do not presently have a 
> clustering solution.
>
> At this point we are using the session to cache information about the 
> user:
>     groups that they are in
>     whether or not they have sudo
>     others?
The user session will totally lost When Kimchi server get reboots and 
this is a big surprise to the user.

>
> All of those are fairly simple to reconstruct in the case that the 
> session gets lost or destroyed.
> i.e. RamSession seems appropriate for the current session usage pattern.
Even for RamSession, we need to check that no racing condition exists 
when two requests access the big session dictionary at the same time.  I 
searched a bit, no clear answer yet.