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37f03da8ba
Deleting a clone requires finding blocks are clone-only, not shared with the snapshot. This was done by traversing the entire block tree which results in a large performance penalty for sparsely written clones. This is new method keeps track of clone blocks when they are modified in a "Livelist" so that, when it’s time to delete, the clone-specific blocks are already at hand. We see performance improvements because now deletion work is proportional to the number of clone-modified blocks, not the size of the original dataset. Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com> Signed-off-by: Sara Hartse <sara.hartse@delphix.com> Closes #8416
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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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) 2012, 2018 by Delphix. All rights reserved.
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* Copyright (c) 2012, Joyent, Inc. All rights reserved.
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*/
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#ifndef _SYS_DSL_DESTROY_H
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#define _SYS_DSL_DESTROY_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct nvlist;
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struct dsl_dataset;
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struct dsl_pool;
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struct dmu_tx;
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int dsl_destroy_snapshots_nvl(struct nvlist *, boolean_t,
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struct nvlist *);
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int dsl_destroy_snapshot(const char *, boolean_t);
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int dsl_destroy_head(const char *);
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int dsl_destroy_head_check_impl(struct dsl_dataset *, int);
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void dsl_destroy_head_sync_impl(struct dsl_dataset *, struct dmu_tx *);
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int dsl_destroy_inconsistent(const char *, void *);
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int dsl_destroy_snapshot_check_impl(struct dsl_dataset *, boolean_t);
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void dsl_destroy_snapshot_sync_impl(struct dsl_dataset *,
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boolean_t, struct dmu_tx *);
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void dsl_dir_remove_clones_key(dsl_dir_t *, uint64_t, dmu_tx_t *);
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typedef struct dsl_destroy_snapshot_arg {
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const char *ddsa_name;
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boolean_t ddsa_defer;
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} dsl_destroy_snapshot_arg_t;
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int dsl_destroy_snapshot_check(void *, dmu_tx_t *);
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void dsl_destroy_snapshot_sync(void *, dmu_tx_t *);
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typedef struct dsl_destroy_head_arg {
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const char *ddha_name;
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} dsl_destroy_head_arg_t;
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int dsl_destroy_head_check(void *, dmu_tx_t *);
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void dsl_destroy_head_sync(void *, dmu_tx_t *);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DSL_DESTROY_H */
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