Invention Grant
- Patent Title: Limiting bandwidth usage on asynchronous replication sessions for a destination storage system
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Application No.: US16456603Application Date: 2019-06-28
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Publication No.: US10908822B2Publication Date: 2021-02-02
- Inventor: Archana Parasnis , William R. Stronge
- Applicant: EMC IP Holding Company LLC
- Applicant Address: US MA Hopkinton
- Assignee: EMC IP Holding Company LLC
- Current Assignee: EMC IP Holding Company LLC
- Current Assignee Address: US MA Hopkinton
- Agency: Daly, Crowley Mofford & Durkee, LLP
- Main IPC: G06F3/00
- IPC: G06F3/00 ; G06F3/06

Abstract:
An aspect of implementing bandwidth limits on replication sessions for a destination includes creating a list of routing modules having ownership of links going to the destination, calculating, by control modules, a proportionate share of a requested total bandwidth limit based on a number of slices owned and the number of routing modules. The proportionate share of the bandwidth limit is indicated by a budget value of a budget byte window (BBW). An aspect further includes prior to initiating a scan of the slices, identifying a BBW having a budget value equal or greater than the value, allocating the budget value to a thread, and reducing the budget value of the BBW by the predetermined value. An aspect also includes scanning the slices corresponding to the identified BBW, sending a number of bytes transmitted and corresponding number of pages to respective control modules resulting from the scanning, and updating corresponding BBW.
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