What exactly happens when a memcached server fails in standard hasing scenario and consistent hashing scenario

[SivaRam M]

Hi ,
     I have installed memcached server on two machines and added these two server in the client list.
Now im fetching say Key A from server A .  If server A is removed ,this is my understanding . By default I'm using standard hashing ,client will maintain list of servers along with the status of servers  if the server has run down . then there will be cache miss . In case of consistent hashing if the server A fails the keys are evenly distributed among other servers.

what will happen if the server A fails ??
Please correct me if any of my concepts are wrong.

Thanks
Sivaram

[Perrin Harkins]

What happens on the server side is that all of the data in that server is permanently lost.  What happens on the client side depends on the client.  There are dozens of clients for memcached.  If you tell us which client you're using, maybe someone here who is familiar with it can tell you how it behaves.

- Perrin

--
 
---
You received this message because you are subscribed to the Google Groups "memcached" group.
To unsubscribe from this group and stop receiving emails from it, send an email to memcached+...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.

[SivaRam M]

Thanks perrin that was very helpful.I'm using php-memcache client for connecting to memcached .I just want to know is there any failover mechanism that is provided when a server is lost. 

[SivaRam M]

I'm using php-memcache client for connecting to memcached .I just want to know is there any failover mechanism that is provided when a server is lost. 

something like client storing the status of the memcahed server before hasing a particular key.

[Yiftach Shoolman]

Failure and replication capabilities are neither supported by standard Memcached clients nor by the Memcached server. 

That said, you can find some commercial products and services that provide these capabilities. 

  

--

 
---
You received this message because you are subscribed to the Google Groups "memcached" group.
To unsubscribe from this group and stop receiving emails from it, send an email to memcached+...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.

--

Yiftach Shoolman
+972-54-7634621

[Roberto Spadim]

??????

there're opensource solutions...
repcache (old but works) is a async replication
redis and others could do the job too

2013/10/17 Yiftach Shoolman <yiftach....@gmail.com>

--
Roberto Spadim