US 12,086,417 B2
Techniques for servicing I/O operations using redirection
Amitai Alkalay, Kadima (IL); Vladimir Shveidel, Pardes-Hana (IL); and Lior Kamran, Rishon LeZion (IL)
Assigned to Dell Products L.P., Hopkinton, MA (US)
Filed by Dell Products L.P., Hopkinton, MA (US)
Filed on Jan. 25, 2023, as Appl. No. 18/101,281.
Prior Publication US 2024/0248606 A1, Jul. 25, 2024
Int. Cl. G06F 3/06 (2006.01)
CPC G06F 3/0613 (2013.01) [G06F 3/0647 (2013.01); G06F 3/067 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method comprising:
configuring a federation to have a first volume as active from only a first storage system of the federation, wherein while the first volume is configured as active from only the first storage system of the federation, a host only sends I/O operations, which are directed to the first volume, to the first storage system of the federation, wherein said configuring the federation includes:
configuring as inactive, with respect to the first volume, a second storage system of the federation;
determining, subsequent to said configuring and in accordance with criteria, to allow I/O operations directed to the first volume to be sent to both the first storage system and the second storage system of the federation;
responsive to said determining, transitioning the second storage system, with respect to the first volume, from inactive to active, wherein the first storage system is configured as active while the second storage system is also configured as active; and
receiving, from the host at the first storage system and the second storage system, a plurality of I/O operations directed to the first volume while the first storage system and the second storage system are configured as active, wherein the plurality of I/O operations includes a first I/O operation received at the second storage system which is redirected, by the second storage system, to the first storage system for servicing.