Cache disk filling up - Mover not moving.

[MCooksey]

Hi all! 

Unraid Newb here, for some reason my Cache disk is filling up crazily fast without me transfering any data to it, can someone have a look at my log and figure out what I've broken?

 

EDIT: I think I messeed up "Prefer" VS "YES"

EDITOFTHEEDIT: Yep I dun buggered it, it's being normal now. 

Edited May 29, 2022 by MCooksey

[jeepjester97]

I'm having the same issue Mover is not moving.  It will fill up and crash all my docker containers.

 

[itimpi]

2 minutes ago, jeepjester97 said:

I'm having the same issue Mover is not moving.  It will fill up and crash all my docker containers.

 

You are likely to get better informed feedback if you post your system’s diagnostics zip file.

[jeepjester97]

unraid-diagnostics-20220703-1510.zip  Sorry for that. The filling up of the cache has been happening for a while It will get up to 99% in anout 3-5 min overnight then move and drop back to the normal 50% used. any help on this would be appreciated. I have 2 250 GB SSD's in a pool.

[itimpi]

2 hours ago, jeepjester97 said:

unraid-diagnostics-20220703-1510.zip  Sorry for that. The filling up of the cache has been happening for a while It will get up to 99% in anout 3-5 min overnight then move and drop back to the normal 50% used. any help on this would be appreciated. I have 2 250 GB SSD's in a pool.

 

You should make sure you set a value for the Minimum Free Space for the cache to stop Unraid trying to fill it up (you currently have it set to 0). 

[trurl]

You should set Minimum Free for cache to larger than the largest file you expect to write to cache. When Unraid sees cache no longer has Minimum Free it will overflow cache-yes (and prefer) shares to the array.

 

Share a------------s seems to be the culprit.

 

Your cache is large enough for most purposes, how are you filling it up before files get moved to the array? I see you have Mover Tuning plugin installed. I don't use that and I question whether it helps much for preventing cache from filling, though it does have other features that might be useful.

 

It is impossible to move from fast cache to slower array as fast as you can write to cache. Mover is intended for idle time, whether you run it on a normal schedule or with the plugin.

 

 

[jeepjester97]

Thank you both for the info.  I will look at it as soon as I get time tomorrow.

On 7/3/2022 at 3:14 PM, jeepjester97 said:

unraid-diagnostics-20220703-1510.zip  Sorry for that. The filling up of the cache has been happening for a while It will get up to 99% in anout 3-5 min overnight then move and drop back to the normal 50% used. any help on this would be appreciated. I have 2 250 GB SSD's in a pool.

[jeepjester97]

On 7/3/2022 at 5:26 PM, itimpi said:

 

You should make sure you set a value for the Minimum Free Space for the cache to stop Unraid trying to fill it up (you currently have it set to 0). 

Would you please tell me where I have the setting at "0" I

[JonathanM]

29 minutes ago, jeepjester97 said:

Would you please tell me where I have the setting at "0" I

From the "cache.cfg" file in your diagnostics

diskFsType="btrfs"
diskComment=""
diskWarning=""
diskCritical=""
diskUUID="807aadb9-984a-4d8e-a384-34e2c8b9fc7c"
diskShareEnabled="yes"
diskShareFloor="0"
diskExport="e"
diskFruit="no"
diskSecurity="public"
diskReadList=""
diskWriteList=""
diskVolsizelimit=""
diskCaseSensitive="auto"
diskExportNFS="-"
diskExportNFSFsid="0"
diskSecurityNFS="public"
diskHostListNFS=""
diskId="Samsung_SSD_840_Series_S14GNEBCC22846E"
diskId.1="Samsung_SSD_850_EVO_250GB_S21NNXCGA64390W"
diskIdSlot="Samsung_SSD_840_Series_S14GNEBCC22846E"
diskIdSlot.1="Samsung_SSD_850_EVO_250GB_S21NNXCGA64390W"
diskType="Cache"
diskType.1="Cache"
diskSpindownDelay="-1"
diskSpindownDelay.1="-1"
diskSpinupGroup=""
diskSpinupGroup.1=""

 

[trurl]

2 hours ago, jeepjester97 said:

Would you please tell me where I have the setting at "0" I

On Main - Pools Devices, click on Cache to get to its Settings page, there you will see Minimum free space. You may have to stop the array to change it.

 

On 7/3/2022 at 5:58 PM, trurl said:

larger than the largest file you expect to write to cache

 

[itimpi]

5 hours ago, jeepjester97 said:

Would you please tell me where I have the setting at "0" I

Did you click on the link I provided as that should have provided the instructions needed.   If you did click on the link then please mention what could be added to make it clearer.

[jeepjester97]

All has been fixed thank you both