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We're going to go into detail on that (the OSD component) in a future blog post... but short version, yep, it's a custom "filesystem" directly done on the block
by jamwt 10y ago
We're going to go into detail on that (the OSD component) in a future blog post... but short version, yep, it's a custom "filesystem" directly done on the block device.
- jhartmann 10y agoThats very interesting. When you post about that could you go into why you choose that over say large files (say 32 gb or so) that contain each of the collection of blocks? XFS or Ext4 can preallocate large chunks of the files beforehand, so the data looks nice on disk. A fully custom block level device sounds like a nice way to minimize overhead, guess it goes to show that extreme scale makes certain decisions that seem crazy from a support point of view start to make sense.