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Add options to zfs redundant_metadata property

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Currently, additional/extra copies are created for metadata in
addition to the redundancy provided by the pool(mirror/raidz/draid),
due to this 2 times more space is utilized per inode and this decreases
the total number of inodes that can be created in the filesystem. By
setting redundant_metadata to none, no additional copies of metadata
are created, hence can reduce the space consumed by the additional
metadata copies and increase the total number of inodes that can be
created in the filesystem.  Additionally, this can improve file create
performance due to the reduced amount of metadata which needs
to be written.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Dipak Ghosh <dipak.ghosh@hpe.com>
Signed-off-by: Akash B <akash-b@hpe.com>
Closes #13680
This commit is contained in:
Akash B
2022-10-20 05:37:51 +05:30
committed by GitHub
parent 2be0a124af
commit 5405be0365
9 changed files with 151 additions and 15 deletions
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include/sys/dmu.h
+7
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@@ -27,6 +27,7 @@
* Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
* Copyright 2013 Saso Kiselkov. All rights reserved.
* Copyright (c) 2017, Intel Corporation.
* Copyright (c) 2022 Hewlett Packard Enterprise Development LP.
*/
/* Portions Copyright 2010 Robert Milkowski */
@@ -142,6 +143,12 @@ typedef enum dmu_object_byteswap {
#define DMU_OT_IS_DDT(ot) \
((ot) == DMU_OT_DDT_ZAP)
#define DMU_OT_IS_CRITICAL(ot) \
(DMU_OT_IS_METADATA(ot) && \
(ot) != DMU_OT_DNODE && \
(ot) != DMU_OT_DIRECTORY_CONTENTS && \
(ot) != DMU_OT_SA)
/* Note: ztest uses DMU_OT_UINT64_OTHER as a proxy for file blocks */
#define DMU_OT_IS_FILE(ot) \
((ot) == DMU_OT_PLAIN_FILE_CONTENTS || (ot) == DMU_OT_UINT64_OTHER)