[lustre-discuss] Lustre Manual Bug Report: 25.2.2. Enabling and Tuning Root Squash

Gibbins, Faye Faye.Gibbins at cirrus.com
Tue Jun 6 06:00:25 PDT 2017

Thanks Peter, LUDOC-377 created ☺

From: Jones, Peter A [mailto:peter.a.jones at intel.com]
Sent: 06 June 2017 13:44
To: Gibbins, Faye <Faye.Gibbins at cirrus.com>; lustre-discuss at lists.lustre.org
Subject: Re: [lustre-discuss] Lustre Manual Bug Report: 25.2.2. Enabling and Tuning Root Squash

Thanks Faye. The correct place to report suspected documentation bugs is to open a ticket in the documentation project in JIRA - https://jira.hpdd.intel.com/projects/LUDOC<https://urldefense.proofpoint.com/v2/url?u=https-3A__jira.hpdd.intel.com_projects_LUDOC&d=DwMGaQ&c=O3LcjD-V2Iepl5V0N1424A&r=zYKOt5zq8DxD76qBilrgQKxtITGPmVmWHHVOs6JpkMQ&m=-sHh3KfPPVITv7WecLSwCEi3EZkfc_UwfqyDylRSkfM&s=Gi_VfHfaTLjmA_rRJ_4_AHT5bIplGWbd3iHETfu6eAA&e=>

On 6/6/17, 4:41 AM, "lustre-discuss on behalf of Gibbins, Faye" <lustre-discuss-bounces at lists.lustre.org<mailto:lustre-discuss-bounces at lists.lustre.org> on behalf of Faye.Gibbins at cirrus.com<mailto:Faye.Gibbins at cirrus.com>> wrote:


I think I’ve found a bug in the manual: https://build.hpdd.intel.com/job/lustre-manual/lastSuccessfulBuild/artifact/lustre_manual.xhtml#dbdoclet.50438221_48757<https://urldefense.proofpoint.com/v2/url?u=https-3A__build.hpdd.intel.com_job_lustre-2Dmanual_lastSuccessfulBuild_artifact_lustre-5Fmanual.xhtml-23dbdoclet.50438221-5F48757&d=DwMGaQ&c=O3LcjD-V2Iepl5V0N1424A&r=zYKOt5zq8DxD76qBilrgQKxtITGPmVmWHHVOs6JpkMQ&m=-sHh3KfPPVITv7WecLSwCEi3EZkfc_UwfqyDylRSkfM&s=qj0SfRLif84KuGagygaD4ffysqBumSG7p9FvR2PiXek&e=> I’ve included it below in case this is the correct place to report it. If not please let me know and I’ll submit it elsewhere.

In section 25.2.2. Enabling and Tuning Root Squash, the bit that says:

Root squash parameters can also be changed with the lctl conf_param command. For example:

mgs# lctl conf_param testfs.mdt.root_squash="1000:101"
mgs# lctl conf_param testfs.mdt.nosquash_nids="*@tcp"

Should be IMHO:

Root squash parameters can also be changed with the lctl conf_param command. For example:

mgs# lctl conf_param mdt.testfs-MDT0000.root_squash="1000:101"
mgs# lctl conf_param mdt.testfs-MDT0000.nosquash_nids="*@tcp"

Here is an example of me using my version compared to the documentation version using Lustre 2.8 on RHEL 7:

0 edi-vf-1-5:audiodb-MDT0000# lctl get_param mdt.audiodb-MDT0000.root_squash
0 edi-vf-1-5:audiodb-MDT0000# lctl set_param mdt.audiodb-MDT0000.root_squash="0:1"
0 edi-vf-1-5:audiodb-MDT0000# lctl get_param mdt.audiodb-MDT0000.root_squash
0 edi-vf-1-5:audiodb-MDT0000# lctl set_param mdt.audiodb-MDT0000.root_squash="0:0"
# Using the documented version.
0 edi-vf-1-5:audiodb-MDT0000# lctl set_param audiodb.mdt.root_squash="0:1"
error: set_param: param_path 'audiodb/mdt/root_squash': No such file or directory
0 edi-vf-1-5:audiodb-MDT0000#

Faye Gibbins
Snr SysAdmin, Unix Lead Architect
Software Systems and Cloud Services
Cirrus Logic | cirrus.com<http://www.cirrus.com/>  | +44 (0) 131 272 7398

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