confusing with primary cache and action: array to cache

[leonlin]

primary:cache  secondary: array   with action: array to cache

if primary is cache (first write to cache), what does mover do? there is no new data in array,
why it should move data from array to cache unless the old data not in cache
i don't understand why we need it instead of cache only

if action is array->cache, after moving data to cache, i found the data still in array, why?
i modified the file in cache , the file in array is changed too
is there two copy of the file? or just one in cache and symbolic link to array??

 

 

Edited January 3 by leonlin

[JorgeB]

4 hours ago, leonlin said:

if primary is cache (first write to cache), what does mover do? there is no new data in array,

It will overflow to the array if the minimum free space is reached.

[itimpi]

6 hours ago, leonlin said:

if action is array->cache, after moving data to cache, i found the data still in array, why?
i modified the file in cache , the file in array is changed too

 

What makes you think it is still in the array?    Have you found it on a specific array disk?  User Shares will show files regardless of whether they are on the array or a pool (cache).