Announcing brownout periods when rsync will be disabled
As we previously announced, NCBI will discontinue support for the rsync protocol on June 1, 2026, as part of our ongoing effort to enhance security and efficiency. After June 1, attempts to connect to ftp.ncbi.nlm.gov using rsync will fail. To support this transition, we are announcing two temporary “brownout” periods. During these planned intervals, rsync access will be intentionally disabled to help our users identify and update affected workflows.
Brownout schedule
Rsync will be disabled during the following periods (all times are EDT):
- Tuesday, May 12, 2026, from 9 AM until 3 PM
- Wednesday, May 27, 2026, from 9 AM until 3 PM
Continue reading “Reminder! NCBI is Retiring rsync for FTP Downloads June 1, 2026”







