Hello,

I am new to Informix and wanted to get more information about their HA
solutions. This will be a a Linux platform. I come from DB2 so I am
familiar with their solutions (HADR, PureScale). I have found some
information about the following for Informix but I was a little
confused :

1) HDR (seems to be the same as DB2's HADR)
2) Mach 11 - (HDR but can have more than one secondary and those
secondaries allow read and write operations? requires dedicated
servers?)
3) Innovator C - (also HDR but has only one secondary that allows read
and write operations) ? good for a two node setup but not scalable?

I think I understand HDR but not sure I understand Mach 11 or
Innovator C and what their difference is. Does anyone know a very
good writeup on those or can explain the main points on the two?

I am looking for an active/active type solution that can scale
horizontally and maybe even vertically. DB2's HADR doesnt scale well
beyond two nodes. PureScale scales horizontally but is very
cumbersome (requires a lot of expensive add ons like dedicated servers
and infiniband network system).

Your input is appreciated.

On Aug 23, 6:30*pm, shorti <lbrya... (AT) juno (DOT) com> wrote:
IDS can have multiple secondary nodes and the secondary nodes can host
DML operations. It does not require additional hardware, just a set
your configuration so that the secondary is active. Use of the
connection manager will perform load-balancing of the nodes.