[LU-13015] WBC: lfs wbc and lctl wbc utils

• Type: Technical task
• Resolution: Unresolved
• Priority: Blocker
• Assignee: Qian Yingjin
• Reporter: Qian Yingjin

Description

lfs wbc commands

# lfs wbc cache $DIR

If $DIR is an empty directory, try to acquire WBC EX lock from MDT for $DIR;
If $DIR is not an empty directory, add hint to the directory $DIR to indicate that:

• all new creating sub dirs ( not include regular files?) should obtain the EX lock;
• New sub dirs create on MDT synchronously.
• New sub dirs are in (P|S) state;

 

# lfs wbc list $MOUNT

List all root WBC directories on a client.

 

# lfs wbc uncache $DIR

Sync and remove a cached root WBC directory $DIR.

 

#lfs wbc state $file

Display the WBC state of the file $file.

lctl wbc commands

LU-13012 WBC: Rule based auto WBC;

 

# lctl wbc /mnt/lustre [--data-on-pcc] [--metadata-on-pcc] [--device /mnt/pcc] [--memfs]...

Issue Links

• is related to: LU-10938 Metadata writeback cache support
• is related to: LU-10938 Metadata writeback cache support
• is related to: LU-13012 WBC: Rule based auto WBC