zfs discuss - Oct 2009 - zpool failmode

Hi,

I am trying to understand the behavior of zpool failmode=continue rpool.

I''ve read the man page regarding to this and I understand that the
default mode is set to wait. So If I set up my zfs pool to continue, in the case
of loss of connectivity, what is this setting supposed to do?

Does setting failmode=continue prevent the system not to panic when an event
like loss of connectivity or pool failure occur? What does the "EIO"
term refer to in the man page for this setting?

Could somebody explain what really this setting does?

Thanks

Deniz
-- 
This message posted from opensolaris.org

On Tue, Oct 27, 2009 at 5:13 PM, deniz rende <solariswiki at gmail.com>
wrote:
> Hi,
>
> I am trying to understand the behavior of zpool failmode=continue rpool.
>
> I''ve read the man page regarding to this and I understand that the
default
> mode is set to wait. So If I set up my zfs pool to continue, in the case of
> loss of connectivity, what is this setting supposed to do?
>
> Does setting failmode=continue prevent the system not to panic when an
> event like loss of connectivity or pool failure occur? What does the
"EIO"
> term refer to in the man page for this setting?
>
> Could somebody explain what really this setting does?
>
> Thanks
>
> Deniz
>
"wait" causes all I/O to hang while the system attempts to retry the
device.  "continue" will cause the system to continue on as if nothing
has
changed.  "panic" will cause the system to panic and core dump.  The
only
real advantage I see in wait is that it will alert the admin to a failure
rather quickly if you aren''t checking the health of the system on a
regular
basis.

--Tim
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