Toby Thain writes: > > On 27-Aug-08, at 7:21 PM, Ian Collins wrote: > >> Miles Nordin writes: >> >>> >>> In addition, I'm repeating myself like crazy at this point, but ZFS >>> tools used for all pools like 'zpool status' need to not freeze when a >>> single pool, or single device within a pool, is unavailable or slow, >>> and this expectation is having nothing to do with failmode on the >>> failing pool. And NFS running above ZFS should continue serving >>> filesystems from available pools even if some pools are faulted, again >>> nothing to do with failmode. >>> >> I agree with the bulk of this post, but I'd like to add to this last >> point. >> I've had a few problems with ZFS tools hanging on recent builds due to >> problems with a pool on a USB stick. One tiny $20 component causing a >> fault >> that required a reboot of the host. This really shouldn't happen. > > Let's not be too quick to assign blame, or to think that perfecting the > behaviour is straightforward or even possible. > I'm not assigning blame, just illustrating a problem.
If you look back a week or so you will see a thread I started with the subject " ZFS commands hanging in B95". This thread went off list but the cause was tracked back to a problem with a USB pool. > Traditionally, systems bearing 'enterprisey' expectations were/are > integrated hardware and software from one vendor (e.g. Sun) which could > be certified as a unit. > > Start introducing 'random $20 components' and you begin to dilute the > quality and predictability of the composite system's behaviour. > So we shouldn't be using USB sticks to transfer data between home and office systems? If the stick was a FAT device and it crapped out or was removed without unmounting, the system would not have hung. > If hard drive firmware is as cr*ppy as anecdotes indicate, what can we > really expect from a $20 USB pendrive? > All the more reason not to lock up if one craps out. Ian _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
