Hi,
I'm using the libcarob in a server application and I
have three doubts about it.
The first doubt is about round robin connection policy
that seems it is the default policy. In my
application, I build a poll of connections and
basically the use is: I get one connection from the
poll, use it and return it to the poll. It is
necessary because it would be too expansive create a
new connection on each time I need use one. I think
that when it comes round robin policy, each connection
that I would create should point to a different
controler, e.g., if I create 10 connection (from a
ConnectionParameters object) and I'm using 2
controllers, I think I would have 5 connections to the
first controller and 5 connections to the second
controller. The connections 1, 3, 5, 7 and 9 should be
to the first controler and the connections 2, 4, 6, 8
and 10 should be to the second controller, I mean, the
"round robin concept". But I noticed that all
connections I created were to the first controller,
and the second controller was used just when I "stop"
the first controler, so, in normal conditions, the
second controller woundn't be used.
/* Create the object with only one controler */
connectionParameters = new
CarobNS::ConnectionParameters(dbfirstip, dbfirstport,
dbname, dbuser, dbpass);
/* Add a second controler */
connectionParameters->addController(dbsecondip,
dbsecondport);
/* But all connections go to the first controller...
*/
Other doubt is about the use of select syscall to wait
for data at the sockets. I know that select syscall
fails when the number of file descriptors in the
process application exceeds 1024. I didn't checked it
yet in carob, but I've already this problem with other
libraries. So, I think we would make available a
compilation using epoll syscall instead of select
syscall to avoid this problem.
The last doubt is about sequoia performance. I've been
having problems with performance at the sequoia. When
I use just one controler and without replication the
sequoia works well but if I enable replication or use
two controllers the sequoia gets slow and I doesn't
stand the throughput I need. Is there room and
perspectives to improve it?
Thanks in advance,
Bruno
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