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Diving into TrueNas Scale

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sswilson said:
View attachment 44758

It looks like TrueNas takes advantage of available system memory as read/write cache. That ZFS cache slowly ramps up during a large transfer. I don't believe I've ever seen that behaviour on Unraid.

On another note..... the dashboard appears to be stuck on the original 1G ethernet port.... I'll have to try disabling it in bios to see if that does anything.
Click to expand...

My bad..... I double checked and I'm using the default xfs in Unraid while Truenas is using zfs. Unraid apparently can/does do zfs caching (there's a setting to adjust the ratio of system memory available for it) but I'd have to look into whether it's possible to switch over to zfs now that I've already built the array on xfs (I'm assuming no).
 
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lowfat said:
ZFS doesn't use memory as read cache. Not writes. But it will use the entirety of your system memory if allowed to do so.
Click to expand...

Heh.... I think there's an extra negative somewhere in there....... :)

Are you saying it uses it as read cache and not as write cache, or the other way around?

One thing I didn't consider when throwing a second NAS onto the network was that a transfer from the networked drive of one NAS to the drive on another NAS would simultaneously max out both incoming and outgoing bandwidth on the "host" PC (up to the limit of the 2.5G nas ports).
 
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So, if I'm looking at this correctly..... one of the biggest differences (aside from complexity) is that grouped drives (pools) in TN have to be all of the same size regardless of the "raid" setup you want to assign to that pool?

There is a "parity" option but I believe that's still limited to all drives in the pool being the same size? I'm guessing you could probably put one pool of striped 2X8TB drives into a mirror config with a second pool consisting of a single 16TB drive?
 
Have you found every app needs its own server? Like I tried using photo back up apps with Android apps but it seems you need to configure the app on TrueNas to connect to a sever with a proper DNS name?.I hope not every app is requiring its own dedicated outside server connection.
 
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Shadowarez said:
Have you found every app needs its own server? Like I tried using photo back up apps with Android apps but it seems you need to configure the app on TrueNas to connect to a sever with a proper DNS name?.I hope not every app is requiring its own dedicated outside server connection.
Click to expand...

I haven't looked into docker containers yet. (Baby steps for me :) ).

I believe Izerous mentioned in another thread that getting applications to work was a hell of a lot more difficult in TrueNas Scale when compared to how relatively easy it is in Unraid.
 
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I just had a quick look at installing NextCloud, but it's looking for a Pool to add apps to so I think I'll throw an SSD into it tomorrow and create a separate pool for apps on that rather than throwing it onto the mechanical data drives.

I'm not completely clear yet if these applications are docker containers, or if they're proprietary apps for TrueNas.
 
Proxmox for virtualization.

Raid spreads the parity across disks so works best when all the disks are the same size.
 
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