[LU-5029] LFSCK 5: The OST will use new FID sequence when detect inconsistent LAST_ID file

Sun, 30 Jan 2022 10:22:49 +0000

Currently, it is the LFSCK on the OST to rebuild the LAST_ID file if found related inconsistency. And during the LFSCK rebuilding the LAST_ID files, the OST device will become read-only to avoid more damage caused by some FID allocation against the bad LAST_ID file. Such method can work, but it may be not the best, because for a large device, the LFSCK may last some long time to scan the whole device. Instead, if the OST can use new FID sequence, then it can guarantee that the new allocated FID will be valid. It will simplify not only the LFSCK on the OST but also the MDT-OST recovery.

Whamcloud Community JIRA

[LU-5029] LFSCK 5: The OST will use new FID sequence when detect inconsistent LAST_ID file