<div dir="ltr">oops, looks like our back and forth got dropped from ALE cuz I fat fingered a reply!<div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 30, 2018 at 4:41 PM dev null zero two <<a href="mailto:dev.null.02@gmail.com">dev.null.02@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><a href="http://reddit.com/r/datahoarder" target="_blank">reddit.com/r/datahoarder</a> is a great resource for NAS stuff.<div>though prepare to feel woefully inadequate (though a lot of people are using cloud storage so their numbers aren't totally realistic - like I currently have 133 TB of space used but 113 TB of that is in the cloud :-P ) as those folks are hardcore.</div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 30, 2018 at 4:36 PM dev null zero two <<a href="mailto:dev.null.02@gmail.com" target="_blank">dev.null.02@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">"
Interesting. I've never considered the rebalancing ramifications of<br>adding new drives to an array. If you're, say, 80% full then all existing<br>drives would have 80% usage. If you add a new drive, it'll be 0%, so by<br>definition most new data will have to go there, unless the raid array<br>moves content from the existing drives onto the new one. Seems...<br>strange."<div><br></div><div>yeah, it's delicate while it's doing the re-balancing as it's essentially resilvering the array, but it's a great feature if you want to future proof by buying a 24 bay case and only filling half and adding drives as you need.</div><div><br></div><div>its one of the most requested ZFS features and apparently it's finally under development, but who knows when it will see the light of day.</div></div><br><div class="gmail_quote"><div dir="ltr">On Fri, Nov 30, 2018 at 4:29 PM Derek Atkins <<a href="mailto:derek@ihtfp.com" target="_blank">derek@ihtfp.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Interesting. I've never considered the rebalancing ramifications of<br>
adding new drives to an array. If you're, say, 80% full then all existing<br>
drives would have 80% usage. If you add a new drive, it'll be 0%, so by<br>
definition most new data will have to go there, unless the raid array<br>
moves content from the existing drives onto the new one. Seems...<br>
strange.<br>
<br>
Anyways, I'm fine with the replace-existing-drives-with-larger-ones strategy.<br>
I'm also fine with the add new drives in a new raid strategy.<br>
I don't think I'd ever use the "add a new drive to an existing array".<br>
<br>
This is especially true as my system has nice 6-bay stacks that work great<br>
for a nice 6-drive RAIDZ2 array per column!<br>
<br>
-derek<br>
<br>
On Fri, November 30, 2018 4:22 pm, dev null zero two wrote:<br>
> "adding driving to an existing RAIDZ2" *this.*<br>
><br>
> Right now if you want to grow in size, you either build a second array and<br>
> add it to the zpool, or you swap out drives, one at a time, with larger<br>
> capacity and then grow the array.<br>
><br>
> Modern RAID implementations let you add same size (and even different size<br>
> with some solutions!) drives ad-hoc to an array and let it grow without<br>
> issue.<br>
><br>
> Ceph has some cool distributed NAS uses as well.<br>
><br>
> On Fri, Nov 30, 2018 at 4:19 PM Derek Atkins <<a href="mailto:derek@ihtfp.com" target="_blank">derek@ihtfp.com</a>> wrote:<br>
><br>
>> Hi,<br>
>><br>
>> On Fri, November 30, 2018 4:16 pm, dev null zero two via Ale wrote:<br>
>> > +1 FreeNAS but it's pretty inflexible, though adding drives for RAID<br>
>> > expansion is slated on their upcoming features.<br>
>><br>
>> I am curious in what ways you find it inflexible.<br>
>><br>
>> I'm also curious why you say that "adding drives is for a future<br>
>> release"?<br>
>> Or do you mean adding driving to an existing RAIDZ2 as opposed to<br>
>> building a second RAIDZ2 and adding it to the zpool?<br>
>><br>
>> -derek<br>
>> --<br>
>> Derek Atkins 617-623-3745<br>
>> <a href="mailto:derek@ihtfp.com" target="_blank">derek@ihtfp.com</a> <a href="http://www.ihtfp.com" rel="noreferrer" target="_blank">www.ihtfp.com</a><br>
>> Computer and Internet Security Consultant<br>
>><br>
>><br>
><br>
<br>
<br>
-- <br>
Derek Atkins 617-623-3745<br>
<a href="mailto:derek@ihtfp.com" target="_blank">derek@ihtfp.com</a> <a href="http://www.ihtfp.com" rel="noreferrer" target="_blank">www.ihtfp.com</a><br>
Computer and Internet Security Consultant<br>
<br>
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