[LU-9132] Tuning max_sectors_kb on mount

Duplicate — Fri, 3 Dec 2021 22:41:06 +0000

Sometimes user doesn't want the max_sectors_kb being overwritten on MDT/OST mount, we should provide a way for user to have more control over this important parameter, a environment variable MOUNT_LUSTRE_MAX_SECTORS_KB is introduced for this purpose:

When MOUNT_LUSTRE_MAX_SECTORS_KB isn't set, change the max_sectors_kb to max_hw_sectors_kb;
When MOUNT_LUSTRE_MAX_SECTORS_KB is set to 0 or a non-decimal value, leave the old max_sectors_kb setting untouched;
When MOUNT_LUSTRE_MAX_SECTORS_KB is set to a valid decimal value, change the max_sectors_kb to this value;

Whamcloud Community JIRA

[LU-9132] Tuning max_sectors_kb on mount