ZFS...

[Michelle Sullivan]

Michelle Sullivan
http://www.mhix.org/
Sent from my iPad

> On 01 May 2019, at 11:33, Karl Denninger <karl at denninger.net> wrote:
> 
> 
>> On 4/30/2019 19:14, Michelle Sullivan wrote:
>> 
>> Michelle Sullivan
>> http://www.mhix.org/
>> Sent from my iPad
>> 
>>> On 01 May 2019, at 01:15, Karl Denninger <karl at denninger.net> wrote:
>>> 
>>> 
>>> IMHO non-ECC memory systems are ok for personal desktop and laptop
>>> machines where loss of stored data requiring a restore is acceptable
>>> (assuming you have a reasonable backup paradigm for same) but not for
>>> servers and *especially* not for ZFS storage.  I don't like the price of
>>> ECC memory and I really don't like Intel's practices when it comes to
>>> only enabling ECC RAM on their "server" class line of CPUs either but it
>>> is what it is.  Pay up for the machines where it matters.
>> And the irony is the FreeBSD policy to default to zfs on new installs using the complete drive.. even when there is only one disk available and regardless of the cpu or ram class...  with one usb stick I have around here it attempted to use zfs on one of my laptops.
>> 
>> Damned if you do, damned if you don’t comes to mind.
>> 
> Nope.  I'd much rather *know* the data is corrupt and be forced to
> restore from backups than to have SILENT corruption occur and perhaps
> screw me 10 years down the road when the odds are my backups have
> long-since been recycled.

Ahh yes the be all and end all of ZFS.. stops the silent corruption of data.. but don’t install it on anything unless it’s server grade with backups and ECC RAM, but it’s good on laptops because it protects you from silent corruption of your data when 10 years later the backups have long-since been recycled...  umm is that not a circular argument?

Don’t get me wrong here.. and I know you (and some others are) zfs in the DC with 10s of thousands in redundant servers and/or backups to keep your critical data corruption free = good thing.

ZFS on everything is what some say (because it prevents silent corruption) but then you have default policies to install it everywhere .. including hardware not equipped to function safely with it (in your own arguments) and yet it’s still good because it will still prevent silent corruption even though it relies on hardware that you can trust...  umm say what?

Anyhow veered way way off (the original) topic...

Modest (part consumer grade, part commercial) suffered irreversible data loss because of a (very unusual, but not impossible) double power outage.. and no tools to recover the data (or part data) unless you have some form of backup because the file system deems the corruption to be too dangerous to let you access any of it (even the known good bits) ...  

Michelle


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