[Halld-offline] /work/halld3: transition to new server on Thursday morning
marki at jlab.org
Tue Aug 31 11:41:28 EDT 2021
Recall that during the transition of /work/halld to a new server a
couple of weeks ago, /work/halld3 was left alone. SciComp is now ready
to move /work/halld3 to a subdirectory of /work/halld3. Links will be
installed so that the path /work/halld3 will continue to find the same
files as it did in the past, but the physical location of those files
will have changed. And any path starting with /w/halld-sciwork18, which
does work now, will not work after the transition (it may resolve to a
read-only file system at first before disappearing permanently).
*The cut-over will happen between 9 am and 10 am (approximately)
Thursday, September 2 (day after tomorrow)*. During this time the files
on /work/halld3 will be unavailable.
One technical point: the majority of files have already been transferred
to their new home. The outage is to transfer files that will have
recently appeared on the old server to the new. At that point write
access to the old server will be removed so that no more new files are
created. To make this final transfer go faster, we want to minimize the
volume of "new" files on the old server. So for the next couple of days,
before the switch, please try to limit the volume of new files being
written to /work/halld3. Said another way, please refrain from dumping
multi-terabyte datasets to /work/halld3 until after the transition.
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