Virtual splitter

摘要

A system, program product, and computer implemented method for replicating a consistency group comprising monitoring the latency between one or more splitters of the consistency group and replication appliances in the replication cluster for the consistency group (CG); wherein each replication appliance of the replication appliances is configured to be able to receive IO from the one or more splitters, determining which replication appliance of the replication appliances has the lowest latency after including additional latency resulting from assignment of the CG to the replication appliance, and configuring the splitter to replicate IO from the CG to the replication appliance determined to have the lowest latency.

主权项

1. A computer implemented method for replicating a consistency group comprising:
monitoring input/output (IO) latency between one or more splitters of the consistency group and replication appliances in a replication cluster for the consistency group (CG); wherein each replication appliance of the replication appliances is configured to be able to receive IO from the one or more splitters; wherein the one or more splitters split IO at a production site by intercepting IO in a data path being written to storage, creating a copy of the IO, and sending the copy to one or more of the replication appliances; wherein the IO latency is the time to send the copy of the IO to a replication appliance; determining which replication appliance of the replication appliances has a lowest latency to receive IO split from a splitter of the one or more splitters; wherein the lowest latency includes the IO latency and an additional latency resulting from a proposed assignment of the CG split by the splitter to the replication appliance; wherein the additional latency results from an addition load on the replication appliance handling IO split from the splitter of the one or more splitter; and configuring the splitter to replicate IO from the CG to the replication appliance determined to have the lowest latency.