[lustre-discuss] Lustre Sizing

ANS ans3456 at gmail.com
Mon Dec 31 22:09:02 PST 2018


Dear Team,

I am trying to configure lustre with backend ZFS as file system with 2
servers in HA. But after compiling and creating zfs pools

zpool list
NAME           SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP
  HEALTH  ALTROOT
lustre-data   54.5T  25.8M  54.5T        -     16.0E     0%     0%  1.00x
  ONLINE  -
lustre-data1  54.5T  25.1M  54.5T        -     16.0E     0%     0%  1.00x
  ONLINE  -
lustre-data2  54.5T  25.8M  54.5T        -     16.0E     0%     0%  1.00x
  ONLINE  -
lustre-data3  54.5T  25.8M  54.5T        -     16.0E     0%     0%  1.00x
  ONLINE  -
lustre-meta    832G  3.50M   832G        -     16.0E     0%     0%  1.00x
  ONLINE  -

and when mounted to client

lfs df -h
UUID                       bytes        Used   Available Use% Mounted on
home-MDT0000_UUID         799.7G        3.2M      799.7G   0% /home[MDT:0]
home-OST0000_UUID          39.9T       18.0M       39.9T   0% /home[OST:0]
home-OST0001_UUID          39.9T       18.0M       39.9T   0% /home[OST:1]
home-OST0002_UUID          39.9T       18.0M       39.9T   0% /home[OST:2]
home-OST0003_UUID          39.9T       18.0M       39.9T   0% /home[OST:3]

filesystem_summary:       159.6T       72.0M      159.6T   0% /home

So out of total 54.5TX4=218TB i am getting only 159 TB usable. So can any
one give the information regarding this.

Also from performance prospective what are the zfs and lustre parameters to
be tuned.

-- 
Thanks,
ANS.
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