On Tue, 26 May 2009, Frank Middleton wrote:
Just asking if an option for machines with no ecc and their inevitable memory errors is a reasonable thing to suggest in an RFE.
Machines lacking ECC do not suffer from "inevitable memory errors". Memory errors are not like death and taxes.
Exactly. My whole point. And without ECC there's no way of knowing. But if the data is damaged /after/ checksum but /before/ write, then you have a real problem...
If memory does not work, then you do have a real problem. The ZFS ARC consumes a large amount of memory. Note that the problem of corruption around the time of the checksum/write is minor compared to corruption in the ZFS ARC since data is continually read from the ZFS ARC and so bad data may be returned to the user even though it is (was?) fine on disk. This is as close as ZFS comes to having an Achilles' heel. Solving this problem would require crippling the system performance.
Never said it was broken. I assume the same code is used for both SPARC and X86, and it works fine on SPARC. It would seem that this machine gets memory errors so often (even though it passes the Linux memory diagnostic) that it can never get to the end of a 4GB recv stream. Odd
Maybe you need a new computer, or need to fix your broken one. Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
