Hi, Ram, I've been using Open Rep in hot pull mode for DMX to DMX for the past 3 years and generally can rely on about 80-120 MB/s.  Here is my typical setup: - Two 2Gb FA ports on source and two on target zoned together but on separate fabrics - Typically, the source DMX is 2 generations older than the target - Source and target arrays are in the same data center, so no FCIP funny business - Ceiling value is set to NONE and I set the pace instead.  9 times out of 10, I set the pace to 0 to move the data as fast as possible since most of my hot pulls occur off hours  I see two major differences in your setup and mine that would impact performance.  First, your source and target are in different locations.  You mentioned 4 GigE connetions between the two so that's plenty of bandwidth.  However, the host will still likely suffer a reduced response time for each I/O after the hot pull is activated and the host is using the target device.  This is dependent on the distance b/t the two sites and the performance of the connection(s).  e.g. will you really get 4 Gb or will it be something like 2-3 Gb/s?  The second major difference is that you're pulling from a CX.  I don't know about you but our CX's tend to be used and abused more than our DMX arrays.  That is, more hosts sharing the same SP ports, more hosts sharing the same spindles in the RAID group, performance is less of a concern, etc.  Your hot pull session will have to contend with the existing load of the CX.  I would select either a lab or development server slated for migration to test the performance.  Baseline the response time on the host while it's connected to the CX using sar or some other tool.  Compare this to response times you get when the host is switched over to the DMX while the hot pull is running.  Obviously, after the hot pull enters the Copied state, then the performance should return to normal since no I/O is traversing the array-to-array link.  Use this as a gauge for your production systems.  Good luck!
Hi,  We are planning to migrate data from CX3-80 array to DMX 4 array (which are in two different locations) using OR (hot pull).  Configuring FCIP for the OR zoning and data transfer using 4 GigE connections at each end. DMX4 is new array and we can dedicate two FA ports for this replication sothat we can go for ceiling value 100. How would be transfer rate using 4 GigE connectins and what are the other factors contribute for the data transfer rate.  your inputs are really helpful. Thanks in advance.  Ram
Rate of data transfer in Open Replicator (Pull)