US 12,001,410 B2
Method and system for detecting compression ratio anomalies in data streams in a deduplication storage system
Nitin Madan, Cupertino, CA (US); Bhimsen Bhanjois, Fremont, CA (US); and Senthil Ponnuswamy, San Jose, CA (US)
Assigned to DELL PRODUCTS L.P., Round Rock, TX (US)
Filed by Dell Products L.P., Round Rock, TX (US)
Filed on Mar. 2, 2022, as Appl. No. 17/684,751.
Prior Publication US 2023/0281174 A1, Sep. 7, 2023
Int. Cl. G06F 16/215 (2019.01)
CPC G06F 16/215 (2019.01) 14 Claims
OG exemplary drawing
 
1. A computer-implemented method of identifying an abnormality in data streams in a deduplication storage system, comprising:
retrieving, by a compression ratio abnormality detector, global compression ratios of historical backups of a source system of a client and local compression ratios of the source system of the client over a predetermined period of time;
plotting, by a compression ratio abnormality detector, a first curve using the global compression ratios and a second curve using the local compression ratios;
smoothening, by a compression ratio abnormality detector, each of the first curve and the second curve using a predetermined smoothening algorithm to generate a first smoothened curve and a second smoothened curve;
finding, by a compression ratio abnormality detector, a second derivative of each data point on each of the first smoothened curve and the second smoothened curve;
identifying, by a compression ratio abnormality detector, one or more data points whose slopes exceed a predetermined threshold on at least one smoothened curve from a group consisting of the first smoothened curve and the second smoothened curve; and
generating an alert message for at least one administrator selected from a group consisting of an administrator of the client and an administrator of the deduplication storage system, wherein the alert message is to inform the at least one administrator that a compression function or that an encryption function has been enabled on the client.