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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 Brian Behlendorf
parent 04f1983aab
commit 7ac732b8d6
9 changed files with 151 additions and 15 deletions
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include/sys/fs/zfs.h
+4 -1
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@@ -29,6 +29,7 @@
* Copyright (c) 2019 Datto Inc.
* Portions Copyright 2010 Robert Milkowski
* Copyright (c) 2021, Colm Buckley <colm@tuatha.org>
* Copyright (c) 2022 Hewlett Packard Enterprise Development LP.
*/
#ifndef _SYS_FS_ZFS_H
@@ -423,7 +424,9 @@ typedef enum {
typedef enum {
ZFS_REDUNDANT_METADATA_ALL,
ZFS_REDUNDANT_METADATA_MOST
ZFS_REDUNDANT_METADATA_MOST,
ZFS_REDUNDANT_METADATA_SOME,
ZFS_REDUNDANT_METADATA_NONE
} zfs_redundant_metadata_type_t;
typedef enum {