Is a manual install of MySQL even possible?

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NASguru wrote:

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I actually see two folders.  The obvious one:  

admin@626X:/apps$ ls
avplus DO_NOT_DELETE plexmediaserver

 

And the hidden one you show:

 

admin@626X:/data/.apps$ ls
avplus DO_NOT_DELETE plexmediaserver

 

 

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You see two, but they are the same folder.  As I said /apps is a mount point for /data/.apps  See the bold line below

root@RN526X://# mount
udev on /dev type devtmpfs (rw,noatime,nodiratime,size=10240k,nr_inodes=491350,mode=755)
devpts on /dev/pts type devpts (rw,noatime,nodiratime,mode=600,ptmxmode=000)
/dev/md0 on / type btrfs (rw,noatime,nodiratime,nospace_cache,subvolid=5,subvol=/)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime,nodiratime)
proc on /proc type proc (rw,nosuid,nodev,noexec,noatime,nodiratime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,noatime,nodiratime,size=983936k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,devices)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,blkio)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,freezer)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,noatime,nodiratime,cpuset)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,noatime,nodiratime,fd=26,pgrp=1,timeout=0,minproto=5,maxproto=5,direct)
debugfs on /sys/kernel/debug type debugfs (rw,noatime,nodiratime)
mqueue on /dev/mqueue type mqueue (rw,noatime,nodiratime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,noatime,nodiratime)
configfs on /sys/kernel/config type configfs (rw,noatime,nodiratime)
/dev/md127 on /data type btrfs (rw,noatime,nodiratime,nospace_cache,subvolid=5,subvol=/)
/dev/md127 on /apps type btrfs (rw,noatime,nodiratime,nospace_cache,subvolid=258,subvol=/.apps)
/dev/md127 on /home type btrfs (rw,noatime,nodiratime,nospace_cache,subvolid=257,subvol=/home)
/dev/md127 on /run/nfs4/home type btrfs (rw,noatime,nodiratime,nospace_cache,subvolid=257,subvol=/home)

NASguru wrote: On a side note, it didn't know this command:  -bash: btrfs: command not found

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root@RN526X://# btrfs filesystem show //
Label: '2fe72582:root' uuid: 537fe1e3-fadd-4fae-bcd3-4a80c8864ea3
Total devices 1 FS bytes used 364.89MiB
devid 1 size 4.00GiB used 1.64GiB path /dev/md0

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NASguru wrote:

I take it if I download and install MySQL under the .apps folder it will create a single folder and stay there?  I've seen on another thread that one of the efforts in cleaning up the App store and such was to keep any app from installing under the system folder.  In otherwords, they like to keep a clean install for apps seperate from the rest of the system.  

  

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As you likely have seen, one of the most common problems with ReadyNAS that we see here is a full OS partition.  4 GB isn't that much space, and if you start using it for cache, databases, etc it can fill up quite quickly.

Installing it to /apps should be fine.  If there are configuration files, etc that include path names they should be set up set up for /apps, and not /data/.apps.  The /data/.apps path can potentially change - if you have two data volumes (flexraid) and delete the one that holds /.apps, then the subvolume is migrated to the remaining volume.