It’s mainly InnoDB.
MyISAM is used to store performance log statistics.

thanks!

In High Performance MySQL 2nd Edition (congratulations for all the work done), you (I don’t forget the other contributors) say that there are 6 servers with 4 searchd instances per server, and that one of the four searchd aggregates the result from the other three. In that situation, what happens if this one fail ? Cause, in this case, if I always go to this searchd instance I’ll lose 1/6 of indexes and not just 1/24.

If you always need to have HA keep 2 boxes having same indexes. You can load balance between them and take one to take over full load if other fails.

We use Dual QuadCore CPUs now.

I know SPHINX very well and I want you explain me how do you deal with the problem of high availability !

i.e : If 4 nodes are down, how you can imagine the situation to give to the last user the same results as if they are not down ?

I tried on my own to imagine that there is a bench of old machines contains same indexes just for backup.
And in sphinx configuration with the SetIndexWeights() function , give those a low weight and those on normal ones a high weight. And then Query all the nodes, backup machines included… what do you think ?

I have an unrelated question :

do you think does an Quad Xeon processor is better then a 2 * Dual core Xeon ? to implement sphinx with distributed searching !

It is even more now We use 4 indexes per box each having dedicated hard drive. We do not use CPU affinity for the search nodes though we could try and see. There is probably 200Gb forth of index per node so some 50GB per CPU. The criteria is random distribution. Though indexes themselves are also date partitioned so when you search for last 3 months only you do not have to go over all data.

- what is the size of sphinx index you use and what is their number per machine?
- Does one index is fully allocated to one CPU? or a branch of them ?
- What is the criteria to subdivide data into different machines and different index ?

I appreciate your board.

Thanks & BRAVO

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