Re: [mh] Misterhouse on Raspberry Pi?

You may also want to look into getting a SD card what is optimized for writes.  

Example would be Samsungs 32Gb Pro Endurance  I use them on all my PIs and DVR cameras.
On Tue, Jan 26, 2021 at 03:43, Giles Godart-Brown  wrote: Someone created this in the Wiki ;https://github.com/hollie/misterhouse/wiki/Minimising-disk-writes (https://github.com/hollie/misterhouse/wiki/Minimising-disk-writes)
 Is there anything on his thread we should add to it?
 Giles
On 26/01/2021 00:30, Tom MacLean wrote:
  Hi Brian, 
I did absolutely nothing to reduce the writes to the SD. 
 I can’t tell what the failure is, I perhaps what I see is the normal “worn out” behaviour. I can say that the last time it died it did so the same way. (Losing recent file charges) 
I had updated my password a few days ago, and after rebooting it wouldn’t take my new password; it had reverted.  
I think the noatime change might be worthwhile, also slowing the logging interval.  
I’m willing to change the SD a few years. My config is saved with git.  
Cheers, 
Tom

Sent from my iPhone 
On Jan 25, 2021, at 5:19 PM, Brian M  (mailto:[email protected]) wrote:

    
I've been really appreciating folks posting their experiences running solely on the microSD.  I don't run my vital RPis that way, because I didn't know what to expect, so this is good information. 
Tom, did you do anything to reduce write traffic to the microSD? Setting "noatime" in /etc/fstab eliminates a lot of writes, because everytime a file is *read*, the access time is updated(written). I've heard of people making /var/log a tmpfs file system (if they don't need their logs), optionally sweeping them to the SD card on an hourly basis. Removing swap and installing zram instead would help (but beware the current 8G bug in zram if you have an 8G RPi 4). Did you do any of these things, or others? 
                          -Brian M.
On 1/25/21 12:28 PM, Tom MacLean wrote:
  I was going to chime in that I just run MH on the microSD without issues, but I just had a failure (on a 4 year old SD), my second such failure. Same as last time: the system boots fine, MH runs without issue, but none of my file changes persist after reboot. It’s just writing to the SDs buffer, not to the flash.  
4 years isn’t too bad though. 

Sent from my iPhone 
On Jan 23, 2021, at 10:32 AM, Giles Godart-Brown  (mailto:[email protected]) wrote:

    I've just had a go at tidying up the Wiki for Raspberry Pi (https://github.com/hollie/misterhouse/wiki/Raspberry-Pi (https://github.com/hollie/misterhouse/wiki/Raspberry-Pi)), moving many of the optional bits onto separate pages so it doesn't look so daunting and adding things I've found during my many installs.
 Giles
On 23/01/2021 12:55, Richard F wrote:
  When I started using an SSD over a decade ago or so (when burning out SSD's was a big concern, as lifetimes weren't initially specified/trusted), I reduced mh data saves by a factor of 5 (in the mh file itself in /bin), like so, which has served me well:

 &object_states_save if &new_minute(5) and !($Time_Start_time or $Time_Stop_time); 
 #    &object_states_save if $New_Minute and !($Time_Start_time or $Time_Stop_time); # Skip if in accelerated mode

 My current Samsung SSD has 81000 hrs on it - over 9yrs - and still 78% of its life left according the smartd.

 I'd also be interested in a Pi guide as that may be the eventual mh destination.  I'm a big fan of the Picoreplayer which has a great feature of running totally from RAM once booted, so you can switch it off without worries.  Though mh needs to write status, I could forsee a picore or similar mini distro that includes mh, and saves its config/recovers (if lost) to network storage or cloud.
On 21/01/2021 7:54 pm, Gianni Veloce wrote:
   hi guys 
as my old Ubuntu laptop running MH is almost broken i am looking to move to Raspberry Pi. 
is there any detailed guide how to setup MH on Rpi? 
and are any hints to avoid the abuse of the SD card with writes from the OS and MH? 
Would installation on a USB drive help in this? 
TIA  
GV
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