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Synchronizing Memcached application

Sun, 12/23/2007 - 21:54 — gupry

I have an application with couple of web servers that uses MemcacheD. How can i synchronize concurrent put to the cache? The value of the entry is list.

Atomic append operation could have been helpful, but unfortunately memcahe doesn't support atomic append.

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Mon, 12/24/2007 - 01:21 — Todd Hoff
Todd Hoff's picture

Re: Synchronizing Memcached application

I think Filipe Laborde has a patch: http://www.nabble.com/Append--2B-Search-Commands-to10684933.html

I wonder though with an append how you prevent the accumulation of duplicates?

Sat, 01/12/2008 - 01:16 — atif.ghaffar
atif.ghaffar's picture

Re: Synchronizing Memcached application

gupry,

setup a NAS or buy one and use NFS.
We tried many things at synchronising the cache always thinking that NFS is bad.
Eventually there is nothing that beat a rm -rf /some/directory/group to clean a group cache.

PS: Writes are also synced as the clients (webserver) is using NFS.
A good NAS is not cheap but is well worth the investment.

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