Help, Slow NAS

[Flavlus]

ZFS Deduplication .. thats what need a lot of ram

[fjdhdhcyfhf]

3 minutes ago, Eniqmatic said:

Do explain what "features" you are going to disable that will help?

i saw this when i reasearched if i can run freenas on 4GB of ram. theres a bunch of features you can turn off but it makes it no more useful than dragonflyBSD or debian

[Eniqmatic]

No no no. I suggest you go back and read properly. The BASE requirement for running ZFS is 8GB of RAM. BASE. That isn't taken into account de-dupe, the amount of data you are storing or anything. 8GB is the minimum required to run the file system properly.

[Flavlus]

Just now, Eniqmatic said:

No no no. I suggest you go back and read properly. The BASE requirement for running ZFS is 8GB of RAM. BASE. That isn't taken into account de-dupe, the amount of data you are storing or anything. 8GB is the minimum required to run the file system properly.

Go see Tek Syndicate video on it .. he runs it on 2gb ... only time you would need that much is if using De Dupe

 

[Eniqmatic]

1 minute ago, Flavlus said:

Go see Tek Syndicate video on it .. he runs it on 2gb ... only time you would need that much is if using De Dupe

 

As a demo/tester, you shouldn't do this when you actually come to running it. I like how you talk about this like you know what you were doing but you came on here to ask why your network was running at 100mbps 

[Flavlus]

4 minutes ago, SCHISCHKA said:

i saw this when i reasearched if i can run freenas on 4GB of ram. theres a bunch of features you can turn off but it makes it no more useful than dragonflyBSD or debian

 

2 minutes ago, Eniqmatic said:

As a demo/tester, you shouldn't do this when you actually come to running it. I like how you talk about this like you know what you were doing but you came on here to ask why your network was running at 100mbps 

Its running at around 640mb/s 

[Flavlus]

3 minutes ago, Eniqmatic said:

As a demo/tester, you shouldn't do this when you actually come to running it. I like how you talk about this like you know what you were doing but you came on here to ask why your network was running at 100mbps 

all i was saying is that he explains why that needs a lot of ram .. but only that 

 

[Eniqmatic]

Just now, Flavlus said:

 

Its running at around 640mb/s 

In your original post..

[Flavlus]

2 minutes ago, Eniqmatic said:

In your original post..

Which i then fixed ..was a non cat 5 cable .. IDK how i even had that cable 

 

[Mikensan]

You can run Windows Vista on 2gb too. Doesn't mean it's going to work well, since all of the ram it needs will go to swap/disk.

 

80mbps on your setup is pretty good. RPM only increases seek time, not really rate, especially for single file transfers.

 

Since FreeNAS (and almost every other OS) stores files in RAM for transfers (caching), the first way to increase speeds is to throw more RAM at it. Unused memory gets used for such tasks. Dedupe does not unbuffer from RAM, it lives in RAM forever. This is why you need more RAM for dedupe.

 

**Also I have a low powered CPU for my firewall, I'm only getting around 500-600mbps total throughput.

 

Glad it was as simple as swapping your cable.

[Flavlus]

6 hours ago, Mikensan said:

You can run Windows Vista on 2gb too. Doesn't mean it's going to work well, since all of the ram it needs will go to swap/disk.

 

80mbps on your setup is pretty good. RPM only increases seek time, not really rate, especially for single file transfers.

 

Since FreeNAS (and almost every other OS) stores files in RAM for transfers (caching), the first way to increase speeds is to throw more RAM at it. Unused memory gets used for such tasks. Dedupe does not unbuffer from RAM, it lives in RAM forever. This is why you need more RAM for dedupe.

 

**Also I have a low powered CPU for my firewall, I'm only getting around 500-600mbps total throughput.

 

Glad it was as simple as swapping your cable.

Thanks for the explination.. you think going from 3 to 4 gb would help ? Its only DDR 2 i think

 

[Mikensan]

13 hours ago, Flavlus said:

Thanks for the explination.. you think going from 3 to 4 gb would help ? Its only DDR 2 i think

 

I wouldn't expect a lot honestly. Have you tested your NAS/disks to make sure you can saturate 1gbps? Could be some other limiting factor. RAM helps with transfers but not disk speed (not exactly anyway), so good idea is to test it.

 

Modify a dataset on the volume you want to test so that compression is disabled / set to none.

Then open up shell and navigate to that dataset (ie: /mnt/volume/dataset)

type the following:

dd if=/dev/zero of=tmp.dat bs=2048k count=50k

 

Once this is done you should have your write speed, then to check your read speed we reverse it...

 

dd if=tmp.dat of=/dev/zero bs=2048k count=50k

 

This will give you your read speed.

 

Because the files are nothing but 0s, compression will give you a false sense of speed so make sure it's disabled on the dataset you're testing on.

 

[Flavlus]

9 hours ago, Mikensan said:

I wouldn't expect a lot honestly. Have you tested your NAS/disks to make sure you can saturate 1gbps? Could be some other limiting factor. RAM helps with transfers but not disk speed (not exactly anyway), so good idea is to test it.

 

Modify a dataset on the volume you want to test so that compression is disabled / set to none.

Then open up shell and navigate to that dataset (ie: /mnt/volume/dataset)

type the following:

dd if=/dev/zero of=tmp.dat bs=2048k count=50k

 

Once this is done you should have your write speed, then to check your read speed we reverse it...

 

dd if=tmp.dat of=/dev/zero bs=2048k count=50k

 

This will give you your read speed.

 

Because the files are nothing but 0s, compression will give you a false sense of speed so make sure it's disabled on the dataset you're testing on.

 

Yup had them in my main Desktop before .. some of them 

 

[Mikensan]

On 4/7/2017 at 8:16 PM, Flavlus said:

Yup had them in my main Desktop before .. some of them 

 

The testing will help you look at the combination of the disks and the hardware behind them - in your system they might've been able to but a low powered CPU could have some difficulty. Some NICs will do their own processing while others hand off interrupts to the CPU (normally ok but on a low end CPU, not so great). So if you get a chance, test it the way it sits now just to be sure.