On 06/23/2012 10:38 PM, Wojciech Puchar wrote:
last binary production ready, used version 14; i also found it
to be stable
Any opensource zfs pool verisons beyound that, i am not really sure
about their stablity compared
to UFS rock solid filesystem.
No ZFS pool version can be as trusty as UFS because of ZFS on disk
structure that is plain dangerous.
ZFS use tree-like structure for everything. If upper part of tree is
corrupted, everything below "disappears" and cannot be found.
Having 2,3 or even 100 copies of metadata doesn't help if you would
have (maybe transient) hardware problem and bad metadata would be
writen 2,3 or even 100 times. with proper checksum of course.
UFS uses flat structure - inodes in known places. superblocks are used
to find info about placement, and there are many copies of which only
first is updated under normal operation.
In really unlikely case of all superblocks corrupted just use newfs on
virtual device (may be md) of same size, with same block and fragment
size, and byte per inode, and copy superblock from here.
Dont email me privately. I like ZFS design however i was only
questioning v28 stability for production
compared to a mature production tested UFS.
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