Hi all,
I am testing ec pool backed rbd image performace and found that it takes a very
long time to format the rbd image by mkfs.
I created a 5TB image and mounted it on the client(ubuntu 16.04 with 4.12
kernel) and use mkfs.ext4 and mkfs.xfs to format it.
It takes hours to finish the format and the load on some osds are high and I
can get slow request warning from time to time.
What is a reasonable time to format a 5TB rbd image?What should I do to improve
it?
Thanks
2017-10-29
Frank
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