So, based on the below, there should be no reason why a flash-based
ZFS filesystem should need to do anything special to avoid problems.
That's a Good Thing.
I think that using flash as the system disk will be the way to go.
Using flash as read-only with a disk or memory for read-write would
result in a very fast system with fewer points of failure...
On Jun 20, 2006, at 6:23 PM, Nathan Kroenert wrote:
And, this is a worst case, no?
If the device itself also does some funky stuff under the covers, and
ZFS only writes an update if there is *actually* something to write,
then it could be much much longer than 4 years.
Actually - That's an interesting. I assume ZFS only writes something
when there is actually data?
:)
Nathan.
On Wed, 2006-06-21 at 06:25, Eric Schrock wrote:
On Tue, Jun 20, 2006 at 02:18:34PM -0600, Gregory Shaw wrote:
Wouldn't that be:
5 seconds per write = 86400/5 = 17280 writes per day
256 rotated locations for 17280/256 = 67 writes per location per day
Resulting in (100000/67) ~1492 days or 4.08 years before failure?
That's still a long time, but it's not 100 years.
Yes, I goofed on the math. It's still (256*100000*5) seconds, but
somehow I managed to goof up the math. I tried it again and came up
with 1,481 days.
- Eric
--
Eric Schrock, Solaris Kernel Development http://
blogs.sun.com/eschrock
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