Which versions ? 

Very important data stored in memcached . cat not be easily restarted, 

Memcached run for six months,and the system clock difference between 300ms .

在 2014年9月16日星期二UTC+8下午3时21分22秒,Dormando写道:
>
> Recent versions use a monotonic clock, so changing the system clock can't 
> cause memcached to lose its mind. 
>
> Why are you trying to do this on purpose? 
>
> On Tue, 16 Sep 2014, Yu Liu wrote: 
>
> > Today I found memcached cat not be work。 so , I found memcached stats 
> time while being changed before os date change。 
> > EXP-1 : 
> > Centos 6.5 64bit  
> > Memcache Version: 1.4.7  
> > 
> > # date 
> > Tue Sep 16 09:56:43 CST 2014 
> > 
> > # telnet 10.11.1.15 11211 
> > Trying 10.11.1.15... 
> > Connected to 10.11.1.15 (10.11.1.15). 
> > Escape character is '^]'. stats 
> > STAT pid 2923 
> > STAT uptime 9 
> > STAT time 1410850931 
> > STAT version 1.4.7 
> > 
> > change date  
> > # date 
> > Fri Jul 26 00:00:00 CST 2013 
> > 
> > # telnet 10.11.1.15 11211 
> > Trying 10.11.1.15... 
> > Connected to 10.11.1.15 (10.11.1.15). 
> > Escape character is '^]'. stats 
> > stats 
> > STAT pid 2923 
> > STAT uptime 4258884380 
> > STAT time 5669735302 
> > STAT version 1.4.7 
> > 
> > however upgrade memcache to 1.4.20  
> > Centos 6.5 64bit  
> > Memcache Version: 1.4.20 
> > 
> > #stats 
> > STAT pid 2586 
> > STAT uptime 8 
> > STAT time 1410838280 
> > STAT version 1.4.20 
> > STAT libevent 1.4.13-stable 
> > 
> > change date  
> > stats 
> > STAT pid 2586 
> > STAT uptime 55 
> > STAT time 1410838327 
> > STAT version 1.4.20 
> > 
> > Now, this time can not be changed. what's the matter ?  
> > 
> > I did not find the answer in 
> http://code.google.com/p/memcached/wiki/ReleaseNotes 。  
> > 
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