Hi Jeff, Maybe I mis-read this thread, but I don't think anyone was saying that using ZFS on-top of an intelligent array risks more corruption. Given my experience, I wouldn't run ZFS without some level of redundancy, since it will panic your kernel in a RAID-0 scenario where it detects a LUN is missing and can't fix it. That being said, I wouldn't run anything but ZFS anymore. When we had some database corruption issues awhile back, ZFS made it very simple to prove it was the DB. Just did a scrub and boom, verification that the data was laid down correctly. RAID-5 will have better random read performance the RAID-Z for reasons Robert had to beat into my head. ;-) But if you really need that performance, perhaps RAID-10 is what you should be looking at? Someone smarter than I can probably give a better idea.
Regarding the failure detection, is anyone on the list have the ZFS/FMA traps fed into a network management app yet? I'm curious what the experience with it is? Best Regards, Jason On 1/29/07, Jeffery Malloch <[EMAIL PROTECTED]> wrote:
Hi Guys, SO... >From what I can tell from this thread ZFS if VERY fussy about managing writes,reads and failures. It wants to be bit perfect. So if you use the hardware that comes with a given solution (in my case an Engenio 6994) to manage failures you risk a) bad writes that don't get picked up due to corruption from write cache to disk b) failures due to data changes that ZFS is unaware of that the hardware imposes when it tries to fix itself. So now I have a $70K+ lump that's useless for what it was designed for. I should have spent $20K on a JBOD. But since I didn't do that, it sounds like a traditional model works best (ie. UFS et al) for the type of hardware I have. No sense paying for something and not using it. And by using ZFS just as a method for ease of file system growth and management I risk much more corruption. The other thing I haven't heard is why NOT to use ZFS. Or people who don't like it for some reason or another. Comments? Thanks, Jeff PS - the responses so far have been great and are much appreciated! Keep 'em coming... This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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