-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 All,
I have an in-process "service" that stores valid nonces on a server for a particular set of client operations. The nonces are created once, then expire after a certain amount of time. They never change. I'd like to make this in-process service into an out-of-process service that can be accessed by any node in my cluster, basically acting like a communal hash map. Memcached is the perfect application for this kind of thing, right? It is fast and simple, plus supports key expiration out of the box. Doing a bit of reading (I've never actually used memcached before), it seems like memcached is better-suited as a /cache/ -- that is, something that sits between a slow data source and clients. They suggest that you /not/ configure "failover" but instead allow a dying node in your memcached cluster to simply die and consider the data lost: go back to the canonical data source and re-fetch the data. In my case, I have no (other) canonical data source: I just want to use memcached. (Note that if the whole service were to fall-over and I had to restart the nonce-storage cluster and start with a completely empty "database", it wouldn't be the end of the world. There would be a lot of grumbling, because everyone would have to request new nonces and re-start any transactions that were using them.) Also, the memcached servers don't really know about each other, right? So, it's not really a big, shared hashtable. Instead, it's like a bunch of separate hash tables and the client knows which server ought to have the data when it requests it based upon the key. Am I barking up the wrong tree by looking at memcached? Is there something else that would be better for me? It's a simple enough set of requirements that writing it myself could be done easily. Then again, it's a simple enough set of requirements that someone /must/ have done this before me. Thanks, - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJRSla3AAoJEBzwKT+lPKRYGpsP+wW0kKEjm5k0p2cFrRDF9KAr y5SWi3GWCPSNRbOJkR487CRfFN9cUCuyiq1+wuQrtbhG2osdeLUIb4dS7NOCTRh8 dknyZvGQw9BrBZXvUeVQnMsLrD02YE6qgEp8hAdnLZBoKLb8EOA1FACs2qdWaBW6 8XLxI6nw5yT/y6glP35syq/MfgjFsXdn8+2Wlu5KQdc6YciUMrG/L7ifB4Huxz+S NFqVCsXJeVQU6MGpL1Bucn135WE3dHrZWJlnnP38iq2cATzo+0SM6Yq4ul2APjye EoN252a5WXddEhzMyjRKC8U89XE8ELF44WiP9NN3niEyyHh035+iK3dawhpN40qi XUw87TbnbL/4cAk8wu2d+gD3BHAFl9SrmkAcJ8lPKpn+ExSzFcgXwldc/TJah+yh M8FOGNwF4FfOeVCkAEMEltsk9YJev8IQNPSAYKtI0tzzWtckmq0ujHQpBWd/2knw YtSQALT6cjx0oyJnRTG02Jx1I6OsOQgVaHcarb8ejAAqkK3I0pge1tNroMU2QaHD gNY5wl33msB5WpHRYlsmg0y+6bshjrOrJkpPoYpxuVgGZj5zrPls5WhuFk1zgZ6Z e7j1BMMF/xVykNKS/bO1T6hqGsjCFSXCfT7WURbkkQyQ85Yiyvcmcfrt2tnVFX0x dtB4zpCWED0XLw1CbG88 =eJjT -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
