Is there any difference between force merge and freeze index action in ILM?
My entire ILM is under below.
In warm phase, the index is merged to a single segment which makes the index read only.
{
"policy": {
"phases": {
"hot": {
"min_age": "0ms",
"actions": {
"set_priority": {
"priority": 100
}
}
},
"warm": {
"min_age": "1d",
"actions": {
"shrink": {
"number_of_shards": 1
},
"set_priority": {
"priority": 50
},
"forcemerge": {
"max_num_segments": 1
}
}
},
"delete": {
"min_age": "90d",
"actions": {
"delete": {
"delete_searchable_snapshot": true
}
}
}
}
}
}
Now I have two questions.
Would it bring any better performance or any difference if I add cold phase with freeze action after warm Phase?
Is this freeze action not used in Elastic v8 anymore?