jquery - notification and messaging system in javascript and php (without the need of having to install additional software serverside) -

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i'm running social network messaging , notification feature. each time user sends message or places notification user, row inserted table news_updates details message or notification , friends inserted news_seen table. (once message read, or item related notification opened, seen set 1, i'm doing @ end of callback function ajax request - i'm gathering newsitem_ids news items, open , i'm doing big insert newsitem_ids in it).

news_seen:  newsitem_id bigint,  user_id big int, seen int default '0'

at moment, i'm running ajax request every 3 seconds, check news_updates join news_seen news.

this turns out huge server load i'm getting more , more users. i've been reading lot xmpp , , think push notification service great site.

the thing is, can't decide on way go, since there many options.

also, thought creating own system. i'm planning this:

  • create xml file each user on initial registration (and run batch registered users)

  • once user sends out news update (i have own php function writing them db), include small command manipulate xml file respective friends

  • instead of doing 3sec ajax request, i'd establish long connection xml file using jquery stream , in case changes made since last request, i'd usual ajax request polls data db.

  • instead of running check_seen inside ajax request, i'd insert new items global array, used intervaled function tests if item in list being viewed.

do think idea?

to honest not think implement specification.

  • for example use lighter data-model xml. use json instead.
  • i avoid touching disc(database) as possible(slow).
  • doing 2 requests instead of one(long-polling/polling). try avoid this.
  • i try avoid wasting cpu-time not using interval functions, calling function when needed. use redis's pubsub.
  • polling / long-polling (most of times) bad idea in php because of blocking io. found interesting project named react believe non-blocking io(expensive). have not tested this(the performance) myself, option.
  • for xmpp have install additional software. instance liked prosody it's easy installation/usage. need have @ bosh. bosh client use strophe.js or jsjac.
  • i use socket.io, faye or maybe vertx.io instead, because scale lot better.

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