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Bug 1509358

Summary:	[RHCS 3.y] Change default of rocksdb to no compression
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Mike Hackett <mhackett>
Component:	RADOS	Assignee:	Josh Durgin <jdurgin>
Status:	CLOSED ERRATA	QA Contact:	Parikshith <pbyregow>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	3.0	CC:	ceph-eng-bugs, ceph-qe-bugs, dzafman, gfarnum, hnallurv, kchai, kdreyer, tserlin, vumrao
Target Milestone:	z2	Keywords:	FutureFeature
Target Release:	3.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	RHEL: ceph-12.2.4-4.el7cp Ubuntu: ceph_12.2.4-5redhat1xenial	Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-04-26 17:38:39 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:	1548067
Bug Blocks:

Description Mike Hackett 2017-11-03 15:37:32 UTC

Description of problem:
Disable compression by default on rocksdb.

Current Default:

filestore_rocksdb_options = "max_background_compactions=8;compaction_readahead_size=2097152"

Recommended change for default disabling compression:

filestore_rocksdb_options = "max_background_compactions=8;compaction_readahead_size=2097152;compression=kNoCompression"

Comment 3 Greg Farnum 2017-11-03 16:07:13 UTC

I do not believe disabling compression is an appropriate default. While it can help in some situations, compression reduces the amount of disk IO OSDs must perform.

Comment 6 Vikhyat Umrao 2017-11-10 14:25:23 UTC

Upstream Luminous backport - https://github.com/ceph/ceph/pull/18860

Comment 8 Ken Dreyer (Red Hat) 2018-03-26 15:24:47 UTC

PR 18860 landed in v12.2.2 upstream, so this bug will be resolved in the v12.2.4 rebase

Comment 19 errata-xmlrpc 2018-04-26 17:38:39 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-2018:1259