[mythtv-users] Missing SBE locks/hangs MBE???

Michael Watson michael at thewatsonfamily.id.au
Fri Feb 8 22:12:29 UTC 2013


On 9/02/2013 5:18 AM, Jonathan Larson wrote:
>
> Hello All,
>
> I’ve got 5 SBEs that stay on 24/7 normally. They all connect to a 
> tuner-less (except for a dummy tuner) MBE virtual machine. Yesterday, 
> one of the SBE’s had a hardware failure and stopped responding. 
> Shortly afterwards the MBE stopped responding via its status port or 
> mythweb. And shortly after that the other SBEs also gave up because 
> they couldn’t contact the MBE. Basically, a single hardware issue on 1 
> SBE brought down the whole system.
>
> The storage for recordings is all on the SBEs—2 disks each, defined in 
> the storage groups setup on the MBE. The SBE’s are also cross-mounted 
> via NFS, and they mount a NFS share on the MBE for access to the 
> post-processing user scripts. All those mounts are controlled via 
> autofs, which uses the following options: 
> -rw,noatime,nodiratime,soft,nfsvers=3
>
> I’d really appreciate any advice on how to troubleshoot this cascade 
> failure. I really want to be able to bring down a SBE without an 
> adverse effects to the rest of the system. I wonder if this could be 
> caused by the cross mounting of the storage directories via NFS, and 
> if so, are there any NFS mount/share options that I could use to make 
> them fail gracefully—maybe a shorter timeout period?
>
> Any help would be appreciated.
>
>
Yep, I had the same problems when I had my storage distributed on SBE's 
(and mounted by NFS). Your only options are to centralize your storage 
on the MBE (or a NAS Device), or not mount them via NFS.

Regards
Michael



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