Hide Forgot
Document URL: ------------ https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html/Administration_Guide/Formatting_and_Mounting_Bricks.html#idp4069512 Section Number and Name: ------------------------ 6.4.1. Creating Bricks Manually Describe the issue: ------------------- There is a regression in the way zeroing the newly provisioned lvs works along with lvchange on a RHEL 6.8 setup.In order to disable zeroing,we either have to give the --zero n option during lvcreate itself or re-activate the LV.There's a 100% chance that the customer will hit a ~20% hit on any kind of writes that he does if the workaround steps aren't adhered to. Quoting from the admin guide : "lvchange --zero n VOLGROUP/thin_pool" This works perfectly on a RHEL 6.7 testbed. We need to add a note around this for RHEL 6.8 for the workaround for the regression. Suggestions for improvement: ---------------------------- We need to get rid of "lvchange --zero n VOLGROUP/thin_pool" and add the --zero option to lvcreate itself : lvcreate --thinpool vg1/thin_pool_1 --size 4T --chunksize 1280K --poolmetadatasize 16G --zero n This should work and based on our testing,RHGS layered over RHEL 6.8 will be performant. Additional information: ----------------------- RHGS write regression bug : https://bugzilla.redhat.com/show_bug.cgi?id=1324236 ---> CLOSED lvchange regression bug : https://bugzilla.redhat.com/show_bug.cgi?id=1328245
Also needs to be updated in: https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html/Administration_Guide/Brick_Configuration.html
(In reply to Ambarish from comment #0) > Document URL: > ------------ > > https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html/ > Administration_Guide/Formatting_and_Mounting_Bricks.html#idp4069512 > Also it would be good to update this section -- simplify it as described in bz #1228920.
Hello Manoj, Updated links are ready for review and sign-off: 1) http://jenkinscat.gsslab.pnq.redhat.com:8080/job/doc-Red_Hat_Gluster_Storage-3.1-3.1.2-Stage_Administration_Guide%20%28html-single%29/lastSuccessfulBuild/artifact/tmp/en-US/html-single/index.html#idm140360822389264 2) http://jenkinscat.gsslab.pnq.redhat.com:8080/job/doc-Red_Hat_Gluster_Storage-3.1-3.1.2-Stage_Administration_Guide%20%28html-single%29/lastSuccessfulBuild/artifact/tmp/en-US/html-single/index.html#Brick_Configuration
looks good to me.
Based on Comment 8, moving the bug to ON_QA.
Looks good to me as well. Moving to Verified.
The Admin Guide is published live on the customer portal: https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html-single/Administration_Guide/index.html