Bug 1921927 - Bluestore: user tunable KernelDevice buffer size
Summary: Bluestore: user tunable KernelDevice buffer size
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: RADOS
Version: 4.1
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: ---
: 6.0
Assignee: Radoslaw Zarzynski
QA Contact: skanta
Masauso Lungu
URL:
Whiteboard:
Depends On:
Blocks: 2126050
TreeView+ depends on / blocked
 
Reported: 2021-01-28 21:29 UTC by Kyle Bader
Modified: 2023-03-20 18:56 UTC (History)
15 users (show)

Fixed In Version: ceph-17.2.2-1.el9cp
Doc Type: Enhancement
Doc Text:
.User can now take advantage of a tunable KernelDevice buffer in BlueStore With this release, users can now configure custom alignment for read buffers using `bdev_read_buffer_alignment` command in BlueStore. This removes the limitations imposed by the default 4 KiB alignment space, when buffers are intended to be backed up by huge pages. Additionally, BlueStore, through KernelDevice, gets a configurable pool with `bdev_read_preallocated_huge_buffer_num` parameter of MAP_HUGETLB-based read buffers for workloads with cache-unfriendly access patterns, which undergo recycling and are not cacheable. Taken together, these features allow to shorten a scatter-gather list that is passed by the storage component to NICs, thereby improving the handling of huge page-based read buffers in BlueStore.
Clone Of:
Environment:
Last Closed: 2023-03-20 18:55:33 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github ceph ceph pull 43849 0 None open blk, os/bluestore: introduce huge page-based read buffers 2021-11-09 00:14:55 UTC
Red Hat Product Errata RHBA-2023:1360 0 None None None 2023-03-20 18:56:27 UTC

Comment 1 RHEL Program Management 2021-01-28 21:29:09 UTC 
Please specify the severity of this bug. Severity is defined here:
https://bugzilla.redhat.com/page.cgi?id=fields.html#bug_severity.
Comment 51 errata-xmlrpc 2023-03-20 18:55:33 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 (Red Hat Ceph Storage 6.0 Bug Fix update), 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-2023:1360
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