Re: [zfs-discuss] Re: Re[2]: ZFS in a SAN environment
On Dec 20, 2006, at 00:37, Anton B. Rang wrote: INFORMATION: If a member of this striped zpool becomes unavailable or develops corruption, Solaris will kernel panic and reboot to protect your data. OK, I'm puzzled. Am I the only one on this list who believes that a kernel panic, instead of EIO, represents a bug? I agree as well - did you file a bug on this yet? Inducing kernel panics (like we also do on certain sun cluster failure types) to prevent corruption can often lead to more corruption elsewhere, and usually ripples to throw admins, managers, and users in a panic as well - typically resulting in more corrupted opinions and perceptions of reliability and usability. :) --- .je ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Re: Re[2]: ZFS in a SAN environment
Dennis Clarke wrote: Anton B. Rang wrote: INFORMATION: If a member of this striped zpool becomes unavailable or develops corruption, Solaris will kernel panic and reboot to protect your data. Is this the official, long-term stance? I don't think it is. I think this is an interpretation of current state. OK, I'm puzzled. Am I the only one on this list who believes that a kernel panic, instead of EIO, represents a bug? Nope. I'm with you. no no .. its a feature. :-P If it walks like a duck and quacks like a duck then its a duck. a kernel panic that brings down a system is a bug. Plain and simple. I disagree (nit). A hardware fault can also cause a panic. Faults != bugs. I do agree in principle, though. Panics should be avoided whenever possible. Incidentally, we do track the panic rate and collect panic strings. The last detailed analysis I saw on the data showed that the vast majority were hardware induced. This was a bit of a bummer because we were hoping that the tracking data would lead to identifying software bugs. -- richard ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Re: Re[2]: ZFS in a SAN environment
no no .. its a feature. :-P If it walks like a duck and quacks like a duck then its a duck. a kernel panic that brings down a system is a bug. Plain and simple. I disagree (nit). A hardware fault can also cause a panic. Faults != bugs. ha ha .. yeah. If the sysadm walks over to a machine an pour coffee in it then I guess it will fault all over the place. No appreciation for coffee I guess. however ... when it comes to storage I expect that a disk failure or hot swap will not cause a fault if and only if there still remains some other storage device that holds the bits in a redundant fashion. so .. disks can fail. That should be okay. even memory and processors can fail. within reason. I do agree in principle, though. Panics should be avoided whenever possible. coffee spillage also .. Incidentally, we do track the panic rate and collect panic strings. The last detailed analysis I saw on the data showed that the vast majority were hardware induced. This was a bit of a bummer because we were hoping that the tracking data would lead to identifying software bugs. but it does imply that the software is way better than the hardware eh ? -- Dennis Clarke ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Re: Re[2]: ZFS in a SAN environment
Anton B. Rang wrote: INFORMATION: If a member of this striped zpool becomes unavailable or develops corruption, Solaris will kernel panic and reboot to protect your data. OK, I'm puzzled. Am I the only one on this list who believes that a kernel panic, instead of EIO, represents a bug? Nope. I'm with you. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Re: Re[2]: ZFS in a SAN environment
Anton B. Rang wrote: INFORMATION: If a member of this striped zpool becomes unavailable or develops corruption, Solaris will kernel panic and reboot to protect your data. OK, I'm puzzled. Am I the only one on this list who believes that a kernel panic, instead of EIO, represents a bug? Nope. I'm with you. no no .. its a feature. :-P If it walks like a duck and quacks like a duck then its a duck. a kernel panic that brings down a system is a bug. Plain and simple. Dennis ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
