Patent ID: 11921589
Assignee: EMC IP HOLDING COMPANY LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method comprising:
in a distributed consistency group:
receiving a first IO stream at a primary aggregator from a splitter, wherein the splitter intercepts writes directed to a source;
receiving a second IO stream at a second aggregator from the splitter, wherein the splitter is configured to distribute the writes to the primary aggregator and the second aggregator;
receiving at the primary aggregator a bookmark in the first IO stream;
distributing the bookmark to the second aggregator;
writing a first journal of the primary aggregator to secondary storage and writing a second journal of the second aggregator to the secondary storage, wherein the first journal includes the first IO stream before the bookmark and the second journal includes the second IO stream before the bookmark; and
constructing a do stream by combining the first journal and the second journal and manipulating pointers such that entries in the do stream point to data in the first journal and to data in the second journal, wherein the do stream allows an any point in time backup to be generated for the consistency group.