| Global Mirror |
Article Index for Global |
Website Links For Global |
Information AboutGlobal Mirror |
|
The two sites can be on separate continents or simply on different utlility grids. IBM also provides a synchronous data replication method call Metro Mirror , which is designed to support replication at "Metropolitan" distances of (normally) less than 300-km. Global Mirror is based on existing and FlashCopy . Global Mirror operations periodically invoke a point-in-time copy at the recovery site, at regular intervals, without impacting the I/O to the source volumes. This provides for a continuously updating, nearly up-to-date copy. Then, by grouping many volumes into a Global Mirror session multiple volumes may be copied to the recovery site simultaneously while maintaining point-in-time consistency across those volumes. Global Mirror can be combined with a wide area clustering product like Geographically Dispersed Parallel Sysplex (GDPS), HACMP/XD , or CAW to provide for automated failover between sites. This combined solution provides the lowest RTO (Recovery Time Objective) possible and allows most applications to resume productive operation in between 30-seconds and 600-seconds. The Global Mirror function is available on IBM 's enterprise storage devices including the DS8100 , the DS8300 , the DS6800 , the ESS Model 800 and the ESS Model 750. |
|
|