This would allow to use a small ssd for the databases and a slow disk for the data itself.
IO load would drop significantly and allow more throughput with rotary drives.
to holld all db files on system disk in configurable location. As storagenode all time writing them, and Data hdd all time has to jump from one point to other and do lot of smal operations, than read and write files. It will defenetly rise performance and responce time. At same time will less kill HDD
For now symlinks may work
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