Bug 1359889

Summary:	[RFE] ceph-ansible: journal_size should have default value for example 5G.
Product:	[Red Hat Storage] Red Hat Storage Console	Reporter:	Vikhyat Umrao <vumrao>
Component:	ceph-ansible	Assignee:	seb
Status:	CLOSED CURRENTRELEASE	QA Contact:	ceph-qe-bugs <ceph-qe-bugs>
Severity:	medium	Docs Contact:	Bara Ancincova <bancinco>
Priority:	medium
Version:	2	CC:	adeza, aschoen, ceph-eng-bugs, flucifre, gmeno, jelopez, kdreyer, nthomas, sankarshan, seb
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	3
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Known Issue
Doc Text:	.The default value of `journal_size` is `0` By default, the `journal_size` option in the `ceph-ansible` utility is set to `0`. This option is mandatory and Red Hat strongly recommends to reserve enough disk space for the journal, at least 5 GB depending on the size of your cluster. Using a journal smaller than 5 GB leads to critical performance issues and production stability problems. For more details, see the https://access.redhat.com/documentation/en/red-hat-ceph-storage/2/single/configuration-guide#journal_settings[Journal Settings] section in the https://access.redhat.com/documentation/en/red-hat-ceph-storage/2/single/configuration-guide[Configuration Guide] for Red Hat Ceph Storage 2.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-04-12 13:57:35 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1322504

Description Vikhyat Umrao 2016-07-25 16:02:22 UTC

Description of problem:
[RFE] ceph-ansible: journal_size should have default value for example 5G.


Version-Release number of selected component (if applicable):
Red Hat Ceph Storage 2.0

We had some issues with customers. Where customer choose Journal size as 1024M and it created lot of issues for their deployment.

As they had approx 300+ OSDs it was hard to reconfigure journal and it was like we need to redeploy the cluster. 

I have attached the customer case# 01518937 with this bug.

Comment 2 seb 2016-07-25 16:18:35 UTC

PR opened here: https://github.com/ceph/ceph-ansible/pull/902

Comment 3 seb 2016-07-26 12:51:16 UTC

PR merged, in the process of pushing this downstream.

Comment 7 Christina Meno 2016-07-26 22:08:10 UTC

This is not a blocker, let us document this var in the install guide. We can release it after 2.0

Comment 9 seb 2016-07-27 11:59:27 UTC

This is already documented in the install guide, so this one is more an enhancement requested by the consultants :)

Comment 11 seb 2016-08-11 14:55:28 UTC

It's not really deployment issues but more production stability and performance issues.
I'll also highlight critical performance problems that will occur with a journal_size < 5GB.

Comment 13 seb 2016-08-12 09:27:19 UTC

LGTM thanks Bara!

Comment 15 Federico Lucifredi 2016-10-07 16:59:49 UTC

This will ship concurrently with RHCS 2.1.

Comment 16 Andrew Schoen 2017-03-03 16:05:08 UTC

This looks like it is already in the stable-2.1 branch of ceph-ansible upstream.