From d2734cce68cf740e015312314415f9034c67851c Mon Sep 17 00:00:00 2001 From: Serapheim Dimitropoulos Date: Fri, 16 Dec 2016 14:11:29 -0800 Subject: OpenZFS 9166 - zfs storage pool checkpoint Details about the motivation of this feature and its usage can be found in this blogpost: https://sdimitro.github.io/post/zpool-checkpoint/ A lightning talk of this feature can be found here: https://www.youtube.com/watch?v=fPQA8K40jAM Implementation details can be found in big block comment of spa_checkpoint.c Side-changes that are relevant to this commit but not explained elsewhere: * renames members of "struct metaslab trees to be shorter without losing meaning * space_map_{alloc,truncate}() accept a block size as a parameter. The reason is that in the current state all space maps that we allocate through the DMU use a global tunable (space_map_blksz) which defauls to 4KB. This is ok for metaslab space maps in terms of bandwirdth since they are scattered all over the disk. But for other space maps this default is probably not what we want. Examples are device removal's vdev_obsolete_sm or vdev_chedkpoint_sm from this review. Both of these have a 1:1 relationship with each vdev and could benefit from a bigger block size. Porting notes: * The part of dsl_scan_sync() which handles async destroys has been moved into the new dsl_process_async_destroys() function. * Remove "VERIFY(!(flags & FWRITE))" in "kernel.c" so zhack can write to block device backed pools. * ZTS: * Fix get_txg() in zpool_sync_001_pos due to "checkpoint_txg". * Don't use large dd block sizes on /dev/urandom under Linux in checkpoint_capacity. * Adopt Delphix-OS's setting of 4 (spa_asize_inflation = SPA_DVAS_PER_BP + 1) for the checkpoint_capacity test to speed its attempts to fill the pool * Create the base and nested pools with sync=disabled to speed up the "setup" phase. * Clear labels in test pool between checkpoint tests to avoid duplicate pool issues. * The import_rewind_device_replaced test has been marked as "known to fail" for the reasons listed in its DISCLAIMER. * New module parameters: zfs_spa_discard_memory_limit, zfs_remove_max_bytes_pause (not documented - debugging only) vdev_max_ms_count (formerly metaslabs_per_vdev) vdev_min_ms_count Authored by: Serapheim Dimitropoulos Reviewed by: Matthew Ahrens Reviewed by: John Kennedy Reviewed by: Dan Kimmel Reviewed by: Brian Behlendorf Approved by: Richard Lowe Ported-by: Tim Chase Signed-off-by: Tim Chase OpenZFS-issue: https://illumos.org/issues/9166 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7159fdb8 Closes #7570 --- tests/zfs-tests/include/commands.cfg | 1 + tests/zfs-tests/include/libtest.shlib | 20 +++++++++++++++++++- 2 files changed, 20 insertions(+), 1 deletion(-) (limited to 'tests/zfs-tests/include') diff --git a/tests/zfs-tests/include/commands.cfg b/tests/zfs-tests/include/commands.cfg index 50eb6bd6b..a4417b519 100644 --- a/tests/zfs-tests/include/commands.cfg +++ b/tests/zfs-tests/include/commands.cfg @@ -169,6 +169,7 @@ export ZFSTEST_FILES='chg_usr_exec mmapwrite nvlist_to_lua randfree_file + randwritecomp readmmap rename_dir rm_lnkcnt_zero_file diff --git a/tests/zfs-tests/include/libtest.shlib b/tests/zfs-tests/include/libtest.shlib index 11ca81985..73b397894 100644 --- a/tests/zfs-tests/include/libtest.shlib +++ b/tests/zfs-tests/include/libtest.shlib @@ -22,7 +22,7 @@ # # Copyright 2009 Sun Microsystems, Inc. All rights reserved. # Use is subject to license terms. -# Copyright (c) 2012, 2016 by Delphix. All rights reserved. +# Copyright (c) 2012, 2017 by Delphix. All rights reserved. # Copyright 2016 Nexenta Systems, Inc. # Copyright (c) 2017 Lawrence Livermore National Security, LLC. # Copyright (c) 2017 Datto Inc. @@ -3525,3 +3525,21 @@ function mdb_set_uint32 return 0 } + +# +# Set global scalar integer variable to a hex value using mdb. +# Note: Target should have CTF data loaded. +# +function mdb_ctf_set_int +{ + typeset variable=$1 + typeset value=$2 + + mdb -kw -e "$variable/z $value" > /dev/null + if [[ $? -ne 0 ]]; then + echo "Failed to set '$variable' to '$value' in mdb." + return 1 + fi + + return 0 +} -- cgit v1.2.3