Freenas v8.3.1 - NFS Crashes Server

[Kobus0834]

Hi, I have a single server with 35TB volume. I have created a Iscsi share 25 TB and wanted to add 2 x 5TB NFS shares. I added the shares and about 15-20 minutes later my server froze up. I had to hard boot the server and disable the NFS. Below is the error messag I received before rebooting the server.

Error:
Fatal trap12: Page fault while in kernel mode
Fault Virtual Address = 0x80c71284
Fault code = supervisor read data, page not present
Stopped at vaccess_acl_nfs4+0x86: cmpl %ecx,0x4(%rdx)
Thank you

Server Spec:Intel(R) Xeon(TM) CPU 2.66GHz
12GB RAM
FreeNAS-8.3.1-RELEASE-p2-x64

 

[jgreco]

Re: Iscsi and NFS - one Volume Same server

Please read and comply with the rules or you may be temporarily banned.

You can edit your post and add/fix content or the Title.
Posts not meeting requirements and not updated may be deleted in 24 hours or sooner (Rule #4).

http://forums.freenas.org/showthread.php?1-Forum-Rules

woo a Canned Reply! But seriously, since it should work, you've given us nothing to work with.

 

[Kobus0834]

Re: Iscsi and NFS - one Volume Same server

Please read and comply with the rules or you may be temporarily banned.

You can edit your post and add/fix content or the Title.
Posts not meeting requirements and not updated may be deleted in 24 hours or sooner (Rule #4).

http://forums.freenas.org/showthread.php?1-Forum-Rules

woo a Canned Reply! :) But seriously, since it should work, you've given us nothing to work with.

Hi jgreco,

Did you have a chance to look at my problem as yet after I have added the necessary information?

Thank you!
Kobus

 

[jgreco]

Didn't notice because I don't think it throws posts back into the "New" bin if you merely edit them. And it's not particularly thorough to describe a server by just naming the CPU speed and RAM.

But that's sufficient to make the following observation: that seems consistent with the sorts of panics people see when the system is stressed for memory.

The best way to get the most out of your FreeNAS® system is to install as much RAM as possible. If your RAM is limited, consider using UFS until you can afford better hardware. FreeNAS® with ZFS typically requires a minimum of 8 GB of RAM in order to provide good performance and stability. [...] For systems with large disk capacity (greater than 8 TB), a general rule of thumb is 1 GB of RAM for every 1 TB of storage.

For a 35TB volume, expect to need at least double the RAM (24GB) you have. There's a plausible argument to be made that the recommendation is actually for 8GB *plus* 1GB per TB, so on the slightly paranoid side one could even argue that you should be up at 48GB of RAM.

So, having framed things that way, comments:

1) There's no inherent reason that a smaller memory configuration cannot be made to work. I've got a 12x4TB array on the bench that runs under ESXi which means I can twiddle how much memory it gets. It can be made to work on 8GB but performance kind of tanks.

2) iSCSI seems to be somewhat less intensive on ZFS and kernel than NFS. I suspect that may help to explain why you were getting away with running iSCSI on such a large pool with small memory. I've run FreeNAS with ZFS for iSCSI on 1GB and I think even less, though not for anything important, and it required tuning.