| Summary: | Please update the default hardware table with Nimble device section | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | shivamerla1 <shiva.krishna> |
| Component: | device-mapper-multipath | Assignee: | Ben Marzinski <bmarzins> |
| Status: | CLOSED ERRATA | QA Contact: | Lin Li <lilin> |
| Severity: | high | Docs Contact: | Steven J. Levine <slevine> |
| Priority: | unspecified | ||
| Version: | 7.3 | CC: | agk, bmarzins, heinzm, lilin, msnitzer, prajnoha, shiva.krishna |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| 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.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-08-01 16:34:26 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: | |
|
Description
shivamerla1
2016-12-20 01:52:06 UTC
hello shivamerla1, There is no Nimble Storage in our lab, so could you help verify it and provide test result? thanks in advance! Yes, we will help validate the changes. Please provide us the test package. thanks. (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? 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
}
I've added this to the default configurations. Thanks a lot. Just adding a description to fit the Release Notes format of title/description. (It may be a little redundant.) 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"
}
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 |