Bug 1415779

Summary:	[RFE] Support for Intel iCAS
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Neil Levine <nlevine>
Component:	Ceph-Installer	Assignee:	Andrew Schoen <aschoen>
Status:	CLOSED NOTABUG	QA Contact:	Tejas <tchandra>
Severity:	low	Docs Contact:
Priority:	low
Version:	2.2	CC:	adeza, agk, aschoen, ceph-eng-bugs, dmick, gmeno, hnallurv, nthomas, sankarshan, seb
Target Milestone:	rc	Keywords:	FutureFeature
Target Release:	3.*
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2019-08-21 14:10:38 UTC	Type:	Bug
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Neil Levine 2017-01-23 17:13:52 UTC

iCAS is a disk caching technology provided by Intel for free to all users who buy their SSDs. It can create a partition on a local SSD to be used as a cache for OSDs.

The iCAS managemnt tool is proprietary but the driver itself is under the GPL.

To support the feature, we need to:

* expose options that the user defines via ceph-ansible
* enable ceph-disk to provision the caching device with relevant flags

Comment 2 Christina Meno 2017-01-23 18:26:41 UTC

Good news!

per dgallowa

According to the "Product and Performance Information" portion on https://www-ssl.intel.com/content/www/us/en/software/intel-cache-acceleration-software-performance.html , they used Intel P3700s to use for benchmarking.  

All the smithi have that exact model SSD in them.

Comment 3 Christina Meno 2017-01-23 18:27:21 UTC

would you please break this RFE into smaller bits with Seb?

Comment 4 Loic Dachary 2017-02-15 15:29:21 UTC

FWIW ceph-disk does not provision devices, it formats pre-existing block devices for Ceph. The creation of the block device itself is outside of the scope of ceph-disk. In other words, as long as ceph-ansible knows how to provision the block device, it can be used as an argument to ceph-disk with no modification.

Comment 6 Christina Meno 2017-04-25 19:42:18 UTC

Harish we moved it

Comment 7 Dan Mick 2017-06-07 23:01:50 UTC

FWIW, looked briefly at this today.  It uses a custom utility to associate an SSD/NVMe device with a traditional block device, and creates a new block device "/dev/intelcasN-M" to use as the cached device path.

Comment 8 Loic Dachary 2017-06-08 07:16:37 UTC

Is there an error when running ceph-disk prepare /dev/intelcasN-M ?

Comment 9 Dan Mick 2017-06-08 19:28:15 UTC

I've no idea.  I haven't actually run any code.

Comment 12 Giridhar Ramaraju 2019-08-05 13:10:51 UTC

Updating the QA Contact to a Hemant. Hemant will be rerouting them to the appropriate QE Associate. 

Regards,
Giri

Comment 13 Giridhar Ramaraju 2019-08-05 13:11:53 UTC

Updating the QA Contact to a Hemant. Hemant will be rerouting them to the appropriate QE Associate. 

Regards,
Giri

Comment 14 Giridhar Ramaraju 2019-08-20 07:19:43 UTC

Level setting the severity of this defect to "Low" with a bulk update. Pls
refine it to a more closure value, as defined by the severity definition in
https://bugzilla.redhat.com/page.cgi?id=fields.html#bug_severity