Jigna, As others have said, memcached is a simple, in-memory cache. The purpose of such a cache is to provide a quicker place to get data from but it should not be the actual repository.
For example, if my application shows event dates, those dates may be stored in a database, and that would be the actual repository. When someone requests the event dates from a web page, the web server first checks the cache (which is the quickest possible solution) and either delivers the data from there or goes to the database, retrieves the data, puts it in cache and then delivers the data. The *advantage *of putting it in cache is that the next time the web server needs the data, it may be in cache, which is quicker than reading it off disk from the database. The *disadvantage *of the cache is that, when it isn't found in cache, it's extra steps required (check cache, get data from database, store in cache, deliver as opposed to just get data from database and deliver). The *first value* of the cache is that the number of times items are found in cache generally outweighs the number of times something has to perform the additional steps of going to the database. The *second value* of the cache is that it self-manages memory by expiring items out of the cache either because their expiration date has come and gone or because they haven't be requested of the cache as much as items other items. Josef -- To a programmer with memcached, every problem, from scalability to high-availability to queuing looks like a caching problem. On Tue, Oct 7, 2008 at 12:57 AM, Jigna Joshi <[EMAIL PROTECTED]> wrote: > > Hi, > > Thanx for d quick reply. > actually, in our case we want to make entry in all servers b'coz if > one of the memcached server is down (server which has entry) then it > can get value from another server.. > > rightnow, if i run Set command then it makes entery in only one server > and if that specific server gets down, then our application fails as > it doest get Key from another server. > > regards, > Jigna Joshi > > On Oct 6, 9:04 pm, "Josef Finsel" <[EMAIL PROTECTED]> wrote: > > The standard answer is no. Clients don't support it for many reasons. > > > > The longer answer involves knowing why you want put a Key-Value pair on > all > > of your memcache servers. > > > > > > > > > > > > On Mon, Oct 6, 2008 at 9:32 AM, Jigna Joshi <[EMAIL PROTECTED]> wrote: > > > > > Hi, > > > I want to add Key-Value pair in all memcache server..is it possible? > > > > > On Oct 6, 6:03 pm, Brian Moon <[EMAIL PROTECTED]> wrote: > > > > > http://www.socialtext.net/memcached/index.cgi?faq#how_is_memcached_re... > > > > > > Jigna Joshi wrote: > > > > > Hi, > > > > > > > I am using memcached-1[1].2.6-win32-bin version of MemCache server. > > > > > > > Now, I have 2 instances of this server on different machine. I am > > > > > using memcached-2[1].1.jar to make entry in memcache server through > my > > > > > java application. > > > > > > > When both servers are up, it makes entry in only one of the server. > > > > > > > Is it provide any configuration to make entry of Key-value pair in > all > > > > > memcache servers. > > > > > > > Waiting for your reply. > > > > > > > Thanking You, > > > > > > -- > > > > > > Brian Moon > > > > Senior Web Engineer > > > > ------------------------------ > > > > When you care enough to spend the very least. > http://dealnews.com/-Hide > > > quoted text - > > > > > > - Show quoted text - > > > > -- > > "If you see a whole thing - it seems that it's always beautiful. Planets, > > lives... But up close a world's all dirt and rocks. And day to day, > life's a > > hard job, you get tired, you lose the pattern." > > Ursula K. Le Guin- Hide quoted text - > > > > - Show quoted text - > -- "If you see a whole thing - it seems that it's always beautiful. Planets, lives... But up close a world's all dirt and rocks. And day to day, life's a hard job, you get tired, you lose the pattern." Ursula K. Le Guin
