MFV r268121:
4924 LZ4 Compression for metadata illumos/illumos-gate@b8289d24d8 MFC after: 2 weeks
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commit
9cc8a15b2e
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=268126
@ -23,7 +23,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 30, 2014
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.Dd July 1, 2014
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.Dt ZPOOL-FEATURES 7
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.Os
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.Sh NAME
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@ -235,14 +235,11 @@ administrator can turn on
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compression on any dataset on the
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pool using the
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.Xr zfs 8
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command. Please note that doing so will
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immediately activate the
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.Sy lz4_compress
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feature on the underlying
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pool
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.Pq even before any data is written ,
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and the feature will not be
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deactivated.
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command.
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Also, all newly written metadata
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will be compressed with
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.Sy lz4
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algorithm.
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Since this feature is not read-only compatible, this
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operation will render the pool unimportable on systems without support
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for the
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@ -251,6 +248,12 @@ feature.
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Booting off of
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.Sy lz4
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-compressed root pools is supported.
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.Pp
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This feature becomes
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.Sy active
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as soon as it is enabled and will
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never return to being
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.Sy enabled .
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.It Sy multi_vdev_crash_dump
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.Bl -column "READ\-ONLY COMPATIBLE" "com.joyent:multi_vdev_crash_dump"
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.It GUID Ta com.joyent:multi_vdev_crash_dump
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@ -23,6 +23,7 @@
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* Copyright (c) 2013 by Delphix. All rights reserved.
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* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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* Copyright (c) 2013, Joyent, Inc. All rights reserved.
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* Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
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*/
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#ifdef _KERNEL
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@ -168,7 +169,7 @@ zpool_feature_init(void)
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zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
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"org.illumos:lz4_compress", "lz4_compress",
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"LZ4 compression algorithm support.", B_FALSE, B_FALSE,
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B_FALSE, NULL);
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B_TRUE, NULL);
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zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
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"com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
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@ -24,6 +24,7 @@
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*/
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/* Copyright (c) 2013 by Saso Kiselkov. All rights reserved. */
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/* Copyright (c) 2013, Joyent, Inc. All rights reserved. */
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/* Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved. */
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#include <sys/dmu.h>
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#include <sys/dmu_impl.h>
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@ -44,6 +45,7 @@
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#include <sys/zio_checksum.h>
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#include <sys/zio_compress.h>
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#include <sys/sa.h>
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#include <sys/zfeature.h>
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#ifdef _KERNEL
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#include <sys/vm.h>
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#include <sys/zfs_znode.h>
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@ -1705,8 +1707,16 @@ dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp)
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* XXX -- we should design a compression algorithm
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* that specializes in arrays of bps.
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*/
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compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY :
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ZIO_COMPRESS_LZJB;
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boolean_t lz4_ac = spa_feature_is_active(os->os_spa,
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SPA_FEATURE_LZ4_COMPRESS);
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if (zfs_mdcomp_disable) {
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compress = ZIO_COMPRESS_EMPTY;
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} else if (lz4_ac) {
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compress = ZIO_COMPRESS_LZ4;
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} else {
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compress = ZIO_COMPRESS_LZJB;
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}
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/*
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* Metadata always gets checksummed. If the data
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@ -22,7 +22,7 @@
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011, 2014 by Delphix. All rights reserved.
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* Copyright 2013 Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 2013, 2014, Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
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*/
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@ -6425,6 +6425,22 @@ spa_sync_upgrades(spa_t *spa, dmu_tx_t *tx)
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spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) {
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spa_feature_create_zap_objects(spa, tx);
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}
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/*
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* LZ4_COMPRESS feature's behaviour was changed to activate_on_enable
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* when possibility to use lz4 compression for metadata was added
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* Old pools that have this feature enabled must be upgraded to have
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* this feature active
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*/
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if (spa->spa_uberblock.ub_version >= SPA_VERSION_FEATURES) {
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boolean_t lz4_en = spa_feature_is_enabled(spa,
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SPA_FEATURE_LZ4_COMPRESS);
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boolean_t lz4_ac = spa_feature_is_active(spa,
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SPA_FEATURE_LZ4_COMPRESS);
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if (lz4_en && !lz4_ac)
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spa_feature_incr(spa, SPA_FEATURE_LZ4_COMPRESS, tx);
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}
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rrw_exit(&dp->dp_config_rwlock, FTAG);
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}
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@ -30,6 +30,7 @@
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* Copyright (c) 2013 by Delphix. All rights reserved.
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* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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* Copyright (c) 2013 Steven Hartland. All rights reserved.
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* Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
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*/
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/*
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@ -2504,37 +2505,6 @@ zfs_prop_set_special(const char *dsname, zprop_source_t source,
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}
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break;
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}
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case ZFS_PROP_COMPRESSION:
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{
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if (intval == ZIO_COMPRESS_LZ4) {
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spa_t *spa;
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if ((err = spa_open(dsname, &spa, FTAG)) != 0)
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return (err);
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/*
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* Setting the LZ4 compression algorithm activates
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* the feature.
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*/
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if (!spa_feature_is_active(spa,
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SPA_FEATURE_LZ4_COMPRESS)) {
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if ((err = zfs_prop_activate_feature(spa,
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SPA_FEATURE_LZ4_COMPRESS)) != 0) {
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spa_close(spa, FTAG);
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return (err);
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}
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}
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spa_close(spa, FTAG);
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}
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/*
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* We still want the default set action to be performed in the
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* caller, we only performed zfeature settings here.
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*/
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err = -1;
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break;
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}
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default:
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err = -1;
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}
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