Asymmetric data mirroring

摘要

Methods, systems, and products mirror data between local memory and remote storage. A write command is sent from a server to a remote storage device, and a timer is established. A current time of the timer is compared to a maximum time period. If the maximum time period expires without receipt of an acknowledgment to the write command, then a write error is assumed to exist to the remote storage device.

主权项

1. A method, comprising:
sending, by a server, an electronic request to store data to a local storage device and to mirror the data to a remote storage device; counting, by the server, a time of latency; monitoring, by the server, for receipt of an acknowledgment sent from the remote storage device; submitting, by the server, additional requests to the remote storage device while monitoring for the acknowledgment sent from the remote storage device; determining, by the server, an expiration of the time of latency without the receipt of the acknowledgment sent from the remote storage device; and resubmitting, by the server, the additional requests to the remote storage device in response to the expiration of the time of latency.