Thanks Brian. Your example helps. JJ
On Fri, Aug 21, 2009 at 5:06 PM, Brian Moon <[email protected]> wrote: > > This example works like butter. It also shows the speed. The multi get > returns all the data in the same microsecond. At least, on my server. > > http://pastebin.ca/1538366 > > Brian. > -------- > http://brian.moonspot.net/ > > On 8/21/09 5:11 PM, Jeremiah Jester wrote: > >> Brian, >> >> I just tried this implementation with an array of keys but am unable to >> get things to work. Can you review my code below? >> >> <?PHP >> $ip="x.x.x.x"; //omitted >> $memcache=new Memcache; >> $memcache->connect($ip,11211); >> $art_keys=$memcache->get($data); >> $articles=$memcache->get($art_keys); >> print_r($articles) >> ?> >> >> Print_r($articles) output results in the following: Array() >> >> Any thoughts? >> >> Note: $data contains the following array... >> >> Array ( [0] => 1250806616.459 [1] => 1250806742.147 [2] => >> 1250806879.394 [3] => 1250806945.325 [4] => 1250806973.403 [5] => >> 1250807216.495 [6] => 1250807346.296 [7] => 1250807544.351 [8] => >> 1250807704.403 [9] => 1250807893.019 [10] => 1250807909.371 [11] => >> 1250807977.352 [12] => 1250807998.257 [13] => 1250808035.941 [14] => >> 1250808065.689 [15] => 1250808082.764 [16] => 1250808111.094 [17] => >> 1250808186.522 [18] => 1250808212.955 [19] => 1250812389.799 [20] => >> 1250812749.806 [21] => 1250812761.030 [22] => 1250812789.844 ) >> >> >> Thanks, >> JJ >> >> On Fri, Aug 21, 2009 at 12:04 PM, Brian Moon <[email protected] >> <mailto:[email protected]>> wrote: >> >> >> So, the advantage really comes in to play when you retrieving >> hundreds or even thousands of keys to retrieve in one page request. >> For example, on the dealnews.com <http://dealnews.com> front page, >> >> we show 100-200 articles. Now, we don't use memcached for that >> (whole other philosophy in use there), but I can use it as an >> example. Consider this code: >> >> // get array of keys for front page articles >> $art_keys = $memcache->get("front_page_articles"); >> >> // PHP object takes an array to do multi gets >> $articles = $memcache->get($art_keys); >> >> // now I have a whole array of articles in one call. >> >> So, even with multiple memcached servers, I only need one call to >> each server for a whole set of keys. Otherwise, I would have to >> grab lots of keys one at a time and that would be slower. Much slower. >> >> Brian. >> -------- >> http://brian.moonspot.net/ >> >> >> On 8/21/09 12:10 PM, Bill Moseley wrote: >> >> I've often seen comments about using multi-gets for better >> performance. First, I'm a bit curious if/why it's a big >> performance gain. >> Obviously, not all keys will be on the same memcached server in a >> multi-get request. Can somoene give me the one short >> explanaition or >> point me to where to learn more? >> >> I'm perhaps more curious how people use multiple gets -- or >> really the >> design of an web application that supports this. >> >> I've tended to cache at a pretty low level -- that is if I have >> a method >> in the data model to fetch object "foo" I tend to check the >> cache, if >> not found then fetch from the database and save to memcached. As a >> result we can end up with a lot of separate memcached get >> requests for a >> single web-request. This is less true as the app becomes more >> web2.0-ish, but still happens. >> >> So, I'm curious about the design of an application that supports >> gathering up a number of (perhaps unrelated) cache requests and >> fetch >> all at once. Then fill in the cache where there are >> cache-misses. Am I >> misunderstanding how people use this feature? >> >> >> -- >> Bill Moseley >> [email protected] <mailto:[email protected]> >> <mailto:[email protected] <mailto:[email protected]>> >> >> >>
