Matthew Ahrens wrote:
Matthew Ahrens wrote:
Here is a proposal for a new 'copies' property which would allow
different levels of replication for different filesystems.
Thanks everyone for your input.
The problem that this feature attempts to address is when you have
some data that is more important (and thus needs a higher level of
redundancy) than other data. Of course in some situations you can use
multiple pools, but that is antithetical to ZFS's pooled storage
model. (You have to divide up your storage, you'll end up with
stranded storage and bandwidth, etc.)
Can you expand? I can think of some examples where using multiple pools
- even on the same host - is quite useful given the current feature set
of the product. Or are you only discussing the specific case where a
host would want more reliability for a certain set of data then an
other? If that's the case I'm still confused as to what failure cases
would still allow you to retrieve your data if there are more then one
copy in the fs or pool.....but I'll gladly take some enlightenment. :)
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