[LU-5655] lhsmtool_posix (copy tool agent) does not provide facility to un register

• Type: Improvement
• Resolution: Cannot Reproduce
• Priority: Critical
• Affects Version/s: Lustre 2.5.0, Lustre 2.6.0, Lustre 2.7.0
• Labels: HSM
• Environment: centos 6.5

Epic

client

• Project: HSM
• Assignee: Bruno Faccini (Inactive)
• Reporter: Vinayak Hariharmath (Inactive)

Description

steps :
1. Mounted lustre
2. enabled hsm

    # lctl set_param mdt.lustre-MDT0000.hsm_control=enabled

3. Started copy tool daemon (only one copy tool agent can run on a client )

    #lhsmtool_posix --daemon --hsm-root /tmp/HSM --archive=1 /mnt/lustre/

4. Only way to stop agent is to send TERM signal to agent as per lustre manual. So I killed it (as I wanted to run modified copy tool agent)

    # ps -ef | grep lhs
       root      4017     1  0 16:54 ?        00:00:00 lhsmtool_posix --daemon --hsm-root /tmp/HSM --archive=1 /mnt/lustre/
       root      4045  2110  0 16:55 pts/1    00:00:00 grep lhs

5. Now I tried to start new copy tool agent

     #lhsmtool_posix --daemon --hsm-root /tmp/HSM --archive=1 /mnt/lustre/ 

But got below message from kernel

    Sep 11 16:55:34 localhost kernel: Lustre: HSM agent b150c068-22f2-83cd-21b0-2b4e76a3082a already registered.