Unlike traditional database systems where data and system availability are tied together, there is a wide class of systems targeting realtime monitoring and analytics over structured logs where these properties can be decoupled. In these systems, responsiveness and freshness of data are often more important than perfectly complete answers. One such system is Meta's Scuba [2].
Historically, Scuba has favored system availability along with speed and freshness of results over data completeness and durability. While these choices allowed Scuba to grow from terabyte scale to petabyte scale and continue onboarding a variety of use cases, they also came at an operational cost of dealing with incomplete data and managing data loss.
In this paper, we present the next generation of Scuba's architecture, codenamed
Kraken
, which decouples storage management from the query serving system and introduces a single, durable source of truth. This enables tangible improvements to system fault tolerance and query performance while still respecting tolerable bounds of client observed data freshness. We also describe the journey of how we deployed Kraken into full production as we gradually turned off the older system with no user-visible down time.
INTRODUCTION:
Female substance abusers are a vulnerable population facing numerous barriers to care, especially gynecological health. Access to contraception is a crucial part of women’s health; however, research on contraceptive use in substance abusers is limited. Our aim was to investigate contraceptive methods in a women’s substance abuse rehabilitation facility.
METHODS:
Data was taken from 697 intake surveys of reproductive-aged women between 2013 and 2019. Analysis examined contraceptive use by sociodemographic variables. Trends were compared with data from 2015-2017 National Surveys of Family Growth and 2017 state-level data from the CDC.
RESULTS:
The majority of women did not use contraceptives (40.3%), were sterilized (22.7%) or used condoms (21.1%). Compared to national and Louisiana-specific rates, this data reveals significantly higher proportions of no contraception and sterilization; conversely, there were lower rates of hormonal and long-acting reversible contraceptive methods (6.9; 4.9%). Substance-abusing women reported sterilization at a younger age (37) compared to national averages. 64.8% reported Medicaid enrollment; education and insurance were independent of contraceptive choice (X2=5.76, P=.22; X2=3.15, P=.53; P<.05).
CONCLUSION:
Women in rehabilitation reported both a high rate of sterilization, and limited use of reversible contraceptives. Lack of variability in method could include amenorrhea from chronic substance use, mistrust of the healthcare system, and inadequate education on gynecological health. Residential rehabilitation facilities provide a unique opportunity for providers to deliver contraceptive education in a positive, encouraging environment, while women are focused on making positive lifestyle changes. Addressing this need would give these women greater autonomy over their health and fertility.
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