[LU-13842] Can't add pcc cache with roid only parameter.

• Type: Bug
• Resolution: Not a Bug
• Priority: Minor
• Affects Version/s: Lustre 2.14.0
• Labels: PCC
• Severity: 3
• Assignee: WC Triage
• Reporter: Vikentsi Lapa

Description

Just create this bug to track it status and not miss it, because it was early mentioned in separate email.

From email message

 

[root@qian tests]# ../utils/lctl pcc add /mnt/lustre /mnt/pcc -p "projid={100} roid=2"

lctl pcc pcc: error: setting llite.lustre-ffff9952eece7000.pcc='add /mnt/pcc projid={100} roid=2': Invalid argument (22)

 

Details:

According to the Lustre manual user can add PCC cache with rwid and roid options.

Attempt to add cache with roid option only was failed. So as workaround it is necessary to use rwid option.

Issue Links

• is related to: LU-10499 Readonly Persistent Client Cache support

Comments

[Vikentsi Lapa]

Yes, I can confirm that it is possible to create with

lctl pcc add /mnt/lustre /mnt/pccro_tst -p "projid={100} roid=5"

lctl pcc list /mnt/lustre

pcc:
  -
    pccpath: /mnt/pccro_tst
    hsmtool: posix
    rwid: 5
    roid: 5
    flags: 3e
    autocache: projid={100}

Version for test:

rpm -qa | grep lustre
kmod-lustre-client-2.13.55_3_gaaa3279-1.el7.x86_64
lustre-client-2.13.55_3_gaaa3279-1.el7.x86_64
lustre-iokit-2.13.55_3_gaaa3279-1.el7.x86_64
lustre-client-tests-2.13.55_3_gaaa3279-1.el7.x86_64
kmod-lustre-client-tests-2.13.55_3_gaaa3279-1.el7.x86_64

[Qian Yingjin]

I fixed it in the original patch series

[Vikentsi Lapa]

Where build with fix is located? Is it tracked it separate patch?

[Qian Yingjin]

Fix the bug:

 

[root@qian tests]# ../utils/lctl pcc add /mnt/lustre /mnt/pcc -p "projid={100} roid=2"
[root@qian tests]# ../utils/lctl pcc list /mnt/lustre                           
/mnt/pcc:
  rwid: 2
  flags: 3e
  autocache: projid={100}