Yeah, I created sparse file systems with JFS as well before I attempted
to actually create a real one. The sparse file actually worked. It's
when I really had the drives and created a real system when it blew
chunks. Only so much that can be tested without actually doing it I
guess. Anyway, just mentioned it as a data point to be careful. I
sent the info at the time to Shaggy in hopes he was able to take a look
at it, unfortunately, I needed to get a workable system on-line so had
to find an alternative (xfs).
On 01/07/2010 17:58, Andi Kleen wrote:
Steve Costaras<[email protected]> writes:
Everything here is 64bit and memory was not the issue. It seems just
that the various tools were never tested with such large volumes.
I did some testing a long time ago (when working on the 2.4 64bit kernel)
by creating holey loopback files that very large and creating file systems
on it. That allows to simulate very large volumes, but of course
not fill them.
Back then JFS and XFS were the only ones even in running, the others
didn't work at all for various reasons.
I don't remember the exact sizes I tested, but iirc it was> 100TB.
That was simple a mkfs + mount + create some small files test.
It already needs JFS or XFS to just contain the holey backing file.
-Andi
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