Using nearline storage: Difference between revisions

Using nearline storage (view source)

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 ==Nearline is a filesystem virtualized onto tape== <!--T:1-->
-Nearline storage is a hybrid disk/tape filesystem with a layout like [[Project layout|Project]], which however uses its hybrid nature to take advantage of both the the large amount of inexpensive storage available by tape and the rapid access to data that disk offers.
+Nearline storage is a hybrid disk/tape filesystem with a layout like [[Project layout|Project]], which however uses its hybrid nature to take advantage of both the the large amount of inexpensive storage available by tape and the rapid access to data that disk offers. You can move your less frequently needed data to tape, where they will no longer count against your project space quota. If you later need these files, you can recall them from tape back to disk with a delay ranging from a few minutes up to an hour or two.
-except that it can virtualize files by moving them to tape-based storage on criteria such as age and size, and then back again upon read or recall operations. This is a way to manage less-used files. On tape, the files do not consume any of your quotas other than nearline and they can still be accessed, albeit more slowly than with the home, scratch and project filesystems.