What the command I pasted did was (after diffing the CRUSH map output):
- Move all the IDs from the main tree into the hdd class parallel tree
- Assign fresh IDs to the main tree
- Change all the "step take default" to "step take default class hdd" in
every CRUSH rule
Moving the IDs over is what
Aha, that's what I was looking for! And indeed, it seems to do exactly
what I thought of doing, just move the bucket IDs. I mistakenly thought
this functionality was for people who already had multiple parallel
hierarchies in their crush tree, but it also works for a single default
hierarchy.
This
I haven’t used reclassify in a while, but does the output look like the below,
specifying the device class with item_name ?
{
"rule_id": 3,
"rule_name": "tsECpool",
"type": 3,
"steps": [
{
"op": "set_choo
The crushtool would do that with the --reclassify flag. There was a
thread here on this list a couple of months ago. I’m on my mobile, I
don’t have a link for you right now. But the docs should also contain
some examples, if I’m not mistaken.
Zitat von Hector Martin :
Hi,
I have an old
