1406226 – Please update the default hardware table with Nimble device section

RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 1406226 - Please update the default hardware table with Nimble device section

Summary: Please update the default hardware table with Nimble device section

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	device-mapper-multipath
Sub Component:
Version:	7.3
Hardware:	x86_64
OS:	Linux
Priority:	unspecified
Severity:	high
Target Milestone:	rc
Target Release:	---
Assignee:	Ben Marzinski
QA Contact:	Lin Li
Docs Contact:	Steven J. Levine
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2016-12-20 01:52 UTC by shivamerla1
Modified:	2021-09-03 12:08 UTC (History)
CC List:	7 users (show)
Fixed In Version:	device-mapper-multipath-0.4.9-101.el7
Doc Type:	Enhancement
Doc Text:	Multipath now has a built-in default configuration for Nimble Storage devices The multipath default hardware table now includes an entry for Nimble Storage arrays.
Clone Of:
Environment:
Last Closed:	2017-08-01 16:34:26 UTC
Target Upstream Version:
Embargoed:

Attachments	(Terms of Use)

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHBA-2017:1961	0	normal	SHIPPED_LIVE	device-mapper-multipath bug fix and enhancement update	2017-08-01 17:56:09 UTC

Description shivamerla1 2016-12-20 01:52:06 UTC

Description of problem:
Default hardware table for Nimble Storage devices is missing in device-mapper-multipath.

Please pull the following patches to add default table for Nimble devices. We are fine with the settings below.

https://www.spinics.net/lists/dm-devel/msg28308.html
https://patchwork.kernel.org/patch/9377039/

	device {
		vendor "Nimble"
		product "Server"
		path_grouping_policy "group_by_prio"
		features "1 queue_if_no_path"
		hardware_handler "1 alua"
		prio "alua"
		failback immediate
	}


However, we are currently recommending users to select "round-robin" path selector to get predictable(uniform) I/O load on each path and working on having finite timer for queuing. 

But meanwhile as this patch is posted upstream, please pull the changes in 7.3 updates. I will post an updated patch to add the new entries(path_selector and no_path_retry) after internal teams are fine with the changes.

Comment 2 Lin Li 2017-01-03 06:36:36 UTC

hello shivamerla1,
There is no Nimble Storage in our lab, so could you help verify it and provide test result?
thanks in advance!

Comment 3 shivamerla1 2017-01-03 16:56:43 UTC

Yes, we will help validate the changes. Please provide us the test package. thanks.

Comment 4 Ben Marzinski 2017-01-17 21:53:05 UTC

(In reply to shivamerla1 from comment #0)

> However, we are currently recommending users to select "round-robin" path
> selector to get predictable(uniform) I/O load on each path and working on
> having finite timer for queuing. 
> 
> But meanwhile as this patch is posted upstream, please pull the changes in
> 7.3 updates. I will post an updated patch to add the new
> entries(path_selector and no_path_retry) after internal teams are fine with
> the changes.

Do you have an updated config yet?

Comment 5 shivamerla1 2017-01-17 22:03:13 UTC

Ben, below is the recommended configuration for Nimble arrays. Please add the same to RHEL 7.3 updates. We would like to use round-robin path selector as default as its been tested and proven to be optimal for our storage. Also, we need dev_loss_tmo to be set to infinity, as device addition/removal tends to be slow with large configs(stand-by paths). fast_io_fail_tmo is set to 1.

We don't want to add the "no_path_retry" setting by default yet and let users add it if need finite time to fail I/O(Cluster scenario etc). Thanks.

	device {
		vendor "Nimble"
		product "Server"
		path_grouping_policy "group_by_prio"
		features "1 queue_if_no_path"
		hardware_handler "1 alua"
		prio "alua"
		failback immediate
                path_selector "round-robin 0"
                dev_loss_tmo infinity
                fast_io_fail_tmo  1
	}

Comment 6 Ben Marzinski 2017-02-17 00:13:51 UTC

I've added this to the default configurations.

Comment 7 shivamerla1 2017-02-17 00:32:58 UTC

Thanks a lot.

Comment 9 Steven J. Levine 2017-05-09 20:54:40 UTC

Just adding a description to fit the Release Notes format of title/description. (It may be a little redundant.)

Comment 10 Lin Li 2017-05-22 09:33:58 UTC

Verified on device-mapper-multipath-0.4.9-111.el7

[root@storageqe-84 ~]# rpm -qa | grep multipath 
device-mapper-multipath-debuginfo-0.4.9-111.el7.x86_64
device-mapper-multipath-libs-0.4.9-111.el7.x86_64
device-mapper-multipath-0.4.9-111.el7.x86_64
device-mapper-multipath-sysvinit-0.4.9-111.el7.x86_64
device-mapper-multipath-devel-0.4.9-111.el7.x86_64

[root@storageqe-84 ~]# multipathd show config |grep  -C 10 Nimble
		features "0"
		hardware_handler "0"
		prio "alua"
		failback 30
		rr_weight "priorities"
		no_path_retry "fail"
		flush_on_last_del "yes"
		dev_loss_tmo 30
	}
	device {
		vendor "Nimble"
		product "Server"
		path_grouping_policy "group_by_prio"
		path_selector "round-robin 0"
		features "1 queue_if_no_path"
		hardware_handler "1 alua"
		prio "alua"
		failback immediate
		fast_io_fail_tmo 1
		dev_loss_tmo "infinity"
	}

Comment 11 errata-xmlrpc 2017-08-01 16:34:26 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:1961

Note You need to log in before you can comment on or make changes to this bug.