Abstract: Methods and systems for detecting systemwide service issues by using anomaly localization. In an example, a method includes receiving time-series monitoring data for multiple services, the time-series monitoring data including multiple dimensions and an error metric; for the monitoring data from each service, evaluating scopes within the monitoring data based on an objective function for a time-series of the error metric to identify at least one anomalous scope, each scope including at least one dimension and a value for the dimension; based on evaluating the scopes, generating a ranked list of scopes for each service based on objective function scores for the scopes; correlating the ranked lists of scopes across the multiple services to identify a cross-service anomaly; and generating an alert for the services based on the cross-service anomaly, the alert indicating at least one scope as a potential root cause for the cross-service anomaly.

Abstract: A pet waste bag kit includes a dispenser receiving a pet waste bag roll, and a roll-back arrangement. The pet waste bag roll includes a plurality of continuous disposable bags stacked in a roll form, wherein a distal of a preceding disposable bag is linked to a proximal of a following disposable bag. When the preceding disposable bag is dispensed out of the dispenser through the slit opening, the proximal of the following disposable bag is pulled out of the dispenser through the slit opening. The roll-back arrangement is extended from a center of the pet waste bag roll for rolling back the continuous disposable bags in the dispenser to draw back the proximal of the following disposable bag toward the slit opening. The exposed portion of the proximal of the following disposable bag is minimized after the dispensing of the preceding disposable bag.