UCSF IT Technology

When troubleshooting network connectivity issues or addressing DNS-related errors, one of the most common and effective first steps is to flush the DNS cache. This process clears outdated or corrupted DNS entries, allowing your system to fetch the most up-to-date DNS information from configured servers.This guide will walk you through how to flush the DNS cache on macOS, Windows, and Linux systems.

When troubleshooting network connectivity issues or DNS-related errors, one of the most common first steps is to flush the DNS cache.

If you currently store data in the Department of Epidemiology & Biostatistics (DEB) Data Systems/Data Center or are an active user of the DEB Data Systems Services (DSS) you should be aware that UCSF is taking steps to increase IT security in order to ensure compliance with University of California policy BFB-IS-3: Electronic Information Security (“IS-3”). This policy applies to all campuses, all faculty, staff, students, and contractors who use UC information technology resources, including DSS resources.

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Updated May 2025MOST Study:  Support data collection, cleaning and storage for MOST, as well as provide customizations as needed to the Research Data SystemBACKHOME Study:  Support data collection, cleaning and storage for BACKHOME, as well as provide customizations as needed to the Research Data SystemREACH Study:  Support data collection, cleaning and storage for REACH, as well as provide customizations as needed to the Research Data System and GPU cluster for analysis

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INSERT CONTENT  Email the DSS team or complete this online form.    - does this form change???Open a support ticket - Do you want this here???

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The DSS team can draw on its extensive practical experience to assess technical requirements and needs for individual projects, produce labor and cost estimates for funding proposals, and provide budget justification language. The team is also qualified to review study specifications, make recommendations and provide guidance to investigators upon request. The team typically works iteratively with research teams during pre-award or competitive renewal phases of study planning.   

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The DSS team operates virtual servers that can be configured to meet the needs of disparate groups or research teams upon request, and supports remote desktop protocols for individual network users. All virtual/remote computing offerings operate entirely behind multiple, secure firewalls.Solutions (Skills):

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The Department of Epidemiology & Biostatistics (DEB) IT personnel operate a secure, high-speed network and data infrastructure within the UCSF network, for the purpose of supporting data collection, cleaning, analysis and storage for research investigators. Access to these resources is available to individuals and research teams on a subscription basis, charges for which are distributed using the UCSF recharge mechanism. Subscription costs are allowable charges on federally-sponsored grants and contracts.

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The DSS team has been designing, developing and supporting data management systems for UCSF investigators for almost 40 years, starting with the SHEP pilot study in 1980. The group aims to support epidemiological and population-based research, research education, and clinical trials. Specific expertise includes:

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REDCap software enables investigators to develop online survey instruments and databases. Our team runs an instance of REDCap in our data center that is distinct from the REDCap environment offered by Academic Research Systems (ARS).  

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