Hi ,
I have done this on pretty big web cluster ,
10 pc , where 6 statics and 4 dyns . I have an
Mysql Master on a separate machine and 1 replication instance on
each dyn (you can put them on separates machines if you want )
So for my http load balancing i'm using an Alteon (nice but pain in the ass
to make it work) now I prefer Foundry solutions .
And here comes mysq load balancing .
I have resolved this by a very simple trick . All my scripts are using the
same API to acces the database , and in this api I check the type of
the submited query , if it is an select i just send it to localhost , else
(update insert delete ) i send them to the master .
This works neat for me .
And it allows me to make the difference between tables in the query
(not all tables are replicated) so i can tune this in my api and
not brother all developers with this .
The SqlApi is quite trivial , so i don't post it here , if you want i can
post it to you directly .
Hope this helps .
Best
CB
----- Original Message -----
From: "Eric Thelin" <eric@stripped>
To: <mysql@stripped>
Sent: Friday, November 17, 2000 12:46 AM
Subject: Load balancing queries?
> With replication working the next step to gaining a very high
> performance system is to have an effective method to divide the queryies
> to the many replicated servers. Lets say I have 4 slaves replicating
> off of 1 master and 3 webservers that I want to use to pull queries on
> the database cluster. Is there any existing way to make those 4 slaves
> look like one very high performance database server (by sending
> alternating queries to different servers)? The linux virtual server
> project can do this for other tcp connections (ie. http, ftp, ...). But
> will it work for MySQL? Has anyone done it? It sounds like using the
> direct routing method it should work great. But I haven't done any
> thing like this before so I am only guessing. If this won't work will
> any of the hardware load balancing solutions like cisco's localdirector
> work?
>
> Eric
>
>
> Eric Thelin erict@stripped
> AZtechBiz.com: Where Arizona Does Tech Business
> Voice: 480-377-6743 Fax: 480-377-6755
>
>
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