[LU-6818] quiet permanently deactivated OSTs in "lfs df"

Duplicate — Fri, 1 Dec 2017 02:17:38 +0000

The lfs df output reports inactive OSTs:

lfs df
UUID                   1K-blocks        Used   Available Use% Mounted on
myth-MDT0000_UUID        9174328      629228     8020812   7% /myth[MDT:0]
myth-OST0000_UUID     3880285544  3431022920   255223648  93% /myth[OST:0]
myth-OST0001_UUID     3886052008  2209970436  1481768956  60% /myth[OST:1]
myth-OST0002_UUID     3880285544  3554012112   209851112  94% /myth[OST:2]
OST0003             : inactive device
myth-OST0004_UUID     3880285544  3688294444   191991100  95% /myth[OST:4]

filesystem summary:  15526908640 12883299912  2138834816  86% /myth

However, if the OST is permanently disabled vs. just temporarily deactivated, it would be better not to list them at all as this has been reported several times as annoying to users.

One option is to return a different error code for OSTs that have been permanently deactivated vs. ones temporarily deactivated via "lctl --device X deactivate". I see in lov_iocontrol()::IOC_OBD_STATFS that devices that have never been configured (lov->lov_tgts[index] == NULL) return -EAGAIN and that skips all output, vs. inactive devices (lov->lov_tgts[index]->ltd_active == 0) return -ENODATA.

Whamcloud Community JIRA

[LU-6818] quiet permanently deactivated OSTs in "lfs df"