1 Apr
2020
1 Apr
'20
5:28 p.m.
Hi,
As the upgrade documentation tells:
Note that the first time each OSD starts, it will do a
format
conversion to improve the accounting for “omap” data. This may
take a few minutes to as much as a few hours (for an HDD with lots
of omap data). You can disable this automatic conversion with:
What the documentation does not say is that this process takes a lot of
memory
I am upgrading a rusty cluster from Nautilus, you can check out the ram
consumption as attachment
First, we have a 3TB osd conversion: it tooks ~15min, and 19GB of memory
Then, we have a larger 6TB osd conversion: it tooks more than 2 hours,
and 35GB of memory
Finally, you have the largest 10TB osd: only 1H15, but 52GB of memory