mirror_zfs/tests/zfs-tests/cmd
Serapheim Dimitropoulos d2734cce68 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 <serapheim.dimitro@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Approved by: Richard Lowe <richlowe@richlowe.net>
Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Tim Chase <tim@chase2k.com>

OpenZFS-issue: https://illumos.org/issues/9166
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/7159fdb8
Closes #7570
2018-06-26 10:07:42 -07:00
..
chg_usr_exec Add the ZFS Test Suite 2016-03-16 13:46:16 -07:00
devname2devid Fedora 28: Fix misc bounds check compiler warnings 2018-04-04 10:16:47 -07:00
dir_rd_update Use cstyle -cpP in make cstyle check 2016-12-12 10:46:26 -08:00
file_check Add the ZFS Test Suite 2016-03-16 13:46:16 -07:00
file_trunc Enable remaining tests 2017-05-22 12:34:32 -04:00
file_write OpenZFS 4185 - add new cryptographic checksums to ZFS: SHA-512, Skein, Edon-R 2016-10-03 14:51:15 -07:00
largest_file Enable remaining tests 2017-05-22 12:34:32 -04:00
mkbusy Fedora 28: Fix misc bounds check compiler warnings 2018-04-04 10:16:47 -07:00
mkfile Fix calloc(3) arguments order 2018-04-12 10:50:39 -07:00
mkfiles Add support for user/group dnode accounting & quota 2016-10-07 09:45:13 -07:00
mktree Fedora 28: Fix misc bounds check compiler warnings 2018-04-04 10:16:47 -07:00
mmap_exec Enable remaining tests 2017-05-22 12:34:32 -04:00
mmap_libaio Fix mmap / libaio deadlock 2018-03-28 10:19:22 -07:00
mmapwrite Fix coverity defects: CID 147692, 147693, 147694 2016-10-13 14:38:59 -07:00
nvlist_to_lua OpenZFS 7431 - ZFS Channel Programs 2018-02-08 15:28:18 -08:00
randfree_file Fix coverity defects: CID 147692, 147693, 147694 2016-10-13 14:38:59 -07:00
randwritecomp OpenZFS 9166 - zfs storage pool checkpoint 2018-06-26 10:07:42 -07:00
readmmap Add the ZFS Test Suite 2016-03-16 13:46:16 -07:00
rename_dir Add the ZFS Test Suite 2016-03-16 13:46:16 -07:00
rm_lnkcnt_zero_file Fix file permissions 2016-10-08 14:57:56 -07:00
threadsappend Add the ZFS Test Suite 2016-03-16 13:46:16 -07:00
user_ns_exec Take user namespaces into account in policy checks 2018-03-07 15:40:42 -08:00
xattrtest Fedora 28: Fix misc bounds check compiler warnings 2018-04-04 10:16:47 -07:00
file_common.h Enable remaining tests 2017-05-22 12:34:32 -04:00
Makefile.am OpenZFS 9166 - zfs storage pool checkpoint 2018-06-26 10:07:42 -07:00