Description
New Features
- Native encryption #5769 - The encryption property enables the creation of encrypted filesystems and volumes. The aes-256-ccm algorithm is used by default. Per-dataset keys are managed with zfs load-key and associated subcommands.
- Raw encrypted 'zfs send/receive' #5769 - The zfs send -w option allows an encrypted dataset to be sent and received to another pool without decryption. The received dataset is protected by the original user key from the sending side. This allows datasets to be efficiently backed up to an untrusted system without fear of the data being compromised.
- Device removal #6900 - This feature allows single and mirrored top-level devices to be removed from the storage pool with zpool remove. All data is copied in the background to the remaining top-level devices and the pool capacity is reduced accordingly.
- Pool checkpoints #7570 - The zpool checkpoint subcommand allows you to preserve the entire state of a pool and optionally revert back to that exact state. It can be thought of as a pool wide snapshot. This is useful when performing complex administrative actions which are otherwise irreversible (e.g. enabling a new feature flag, destroying a dataset, etc).
- Pool TRIM #8419 - The zpool trim subcommand provides a way to notify the underlying devices which sectors are no longer allocated. This allows an SSD to more efficiently manage itself and helps prevent performance from degrading. Continuous background trimming can be enabled via the new autotrim pool property.
- Pool initialization #8230 - The zpool initialize subcommand writes a pattern to all the unallocated space. This eliminates the first access performance penalty, which may exist on some virtualized storage (e.g. VMware VMDKs).
- Project accounting and quota #6290 - This features adds project based usage accounting and quota enforcement to the existing space accounting and quota functionality. Project quotas add an additional dimension to traditional user/group quotas. The zfs project and zfs projectspace subcommands have been added to manage projects, set quota limits and report on usage.
- Channel programs #6558 - The zpool program subcommand can be used to perform compound ZFS administrative actions via Lua scripts in a sandboxed environment (with time and memory limits).
- Pyzfs #7230 - The new pyzfs library is intended to provide a stable interface for the programmatic administration of ZFS. This wrapper provides a one-to-one mapping for the libzfs_core API functions, but the signatures and types are more natural to Python.
- Python 3 compatibility #8096 - The arcstat, arcsummary, and dbufstat utilities have been updated to be compatible with Python 3.
- Direct IO #7823 - Adds support for Linux's direct IO interface.
Performance
- Sequential scrub and resilver #6256 - When scrubbing or resilvering a pool the process has been split into two phases. The first phase scans the pool metadata in order to determine where the data blocks are stored on disk. This allows the second phase to issue scrub I/O as sequentially as possible, greatly improving performance.
- Allocation classes #5182 - Allows a pool to include a small number of high-performance SSD devices that are dedicated to storing specific types of frequently accessed blocks (e.g. metadata, DDT data, or small file blocks). A pool can opt-in to this feature by adding a special or dedup top-level device.
- Administrative commands #7668 - Improved performance due to targeted caching of the metadata required for administrative commands like zfs list and zfs get.
- Parallel allocation #7682 - The allocation process has been parallelized by creating multiple "allocators" per-metaslab group. This results in improved allocation performance on high-end systems.
- Deferred resilvers #7732 - This feature allows new resilvers to be postponed if an existing one is already in progress. By waiting for the running resilver to complete redundancy is restored as quickly as possible.
- ZFS Intent Log (ZIL) #6566 - New log blocks are created and issued while there are still outstanding blocks being serviced by the storage, effectively reducing the overall latency observed by the application.
- Volumes #8615 - When a pool contains a large number of volumes they are more promptly registered with the system and made available for use after a zpool import.
- QAT #7295 #7282 #6767 - Support for accelerated SHA256 checksums, AES-GCM encryption, and the new QAT Intel(R) C62x Chipset / Atom(R) C3000 Processor Product Family SoC.
Changes in Behavior
- Relaxed (ref)reservation constraints on volumes, they may now be set larger than the volume size.
- The arcstat.py, arc_summary.py, and dbufstat.py commands have been renamed arcstat, arc_summary, and dbufstat respectively.
- The SPL source is now included in the ZFS repository removing the need for separate packages.
- The dedupditto pool property and zfs send -D option have been deprecated and will be removed in a future release.
Additional Information
- Supported kernels - Compatible with 2.6.32 - 5.1* Linux kernels.
- SIMD acceleration is currently not supported for Linux 5.0 and newer kernels.
- Change log - Complete v0.7.0 - v0.8.0 change log
- Module options - The default values for the module options were selected to yield good performance for the majority of workloads and configurations. They should not need to be tuned for most systems but are available for performance analysis and tuning. See the zfs-module-parameters(5) man page for the complete list of the options and what they control.
Attachments
Issue Links
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LU-11170 sanity test 415 fails with 'rename took N > M sec'
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LU-13122 osd-zfs to use 8K blocksize for llog objects
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Activity
Nathaniel Clark (nclark@whamcloud.com) uploaded a new patch: https://review.whamcloud.com/36310
Subject: LU-12336 build: Update ZFS version to 0.8.2
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 605e397dcf130087b88fc21ac589a48a3b28221b
The 0.8.2 release was made today:
Supported Kernels
Compatible with 2.6.32 - 5.3 Linux kernels
Changes
Disabled resilver_defer feature leads to looping resilvers #9299 #9338
Fix dsl_scan_ds_clone_swapped logic #9140 #9163
Scrubbing root pools may deadlock on kernels without elevator_change() (#9321) #9321
QAT related bug fixes #9276 #9303
kmodtool: depmod path #8724 #9310
Fix /etc/hostid on root pool deadlock #9256 #9285
BuildRequires libtirpc-devel needed for RHEL 8 #9289
Fix zpool subcommands error message with some unsupported options #9270
Fix zfs-dkms .deb package warning in prerm script #9271
zvol_wait script should ignore partially received zvols #9260
New service that waits on zvol links to be created #8975
Always refuse receving non-resume stream when resume state exists #9252
Fix Intel QAT / ZFS compatibility on v4.7.1+ kernels #9268 #9269
etc/init.d/zfs-functions.in: remove arch warning
zfs_handle used after being closed/freed in change_one callback #9165
Fix zil replay panic when TX_REMOVE followed by TX_CREATE #7151 #8910 #9123 #9145
zfs_ioc_snapshot: check user-prop permissions on snapshotted datasets #9179 #9180
Fix Plymouth passphrase prompt in initramfs script #9202
Fix deadlock in 'zfs rollback' #9203
Make slog test setup more robust #9194
zfs-mount-genrator: dependencies should be space-separated #9174
Linux 5.3: Fix switch() fall though compiler errors #9170
Linux 5.3 compat: Makefile subdir-m no longer supported #9169
Fix out-of-order ZIL txtype lost on hardlinked files #8769 #9061
Increase default zcmd allocation to 256K #9084
Improve performance by using dmu_tx_hold_*_by_dnode() #9081
Fix channel programs on s390x #8992 #9080
Race between zfs-share and zfs-mount services #9083
Implement secpolicy_vnode_setid_retain() #9035 #9043
zed crashes when devid not present #9054 #9060
Don't directly cast unsigned long to void* #9065
Fix module_param() type for zfs_read_chunk_size #9051
Move some tests to cli_user/zpool_status #9057
Race condition between spa async threads and export #9015 #9044
hdr_recl calls zthr_wakeup() on destroyed zthr #9047
Fix wrong comment on zcr_blksz_{min,max} #9052
Retire unused spl_{mutex,rwlock}_{init_fini} #9029
Linux 5.3 compat: retire rw_tryupgrade() #9029
Linux 5.3 compat: rw_semaphore owner #9029
Fix lockdep recursive locking false positive in dbuf_destroy #8984
Add missing __GFP_HIGHMEM flag to vmalloc #9031
Use zfsctl_snapshot_hold() wrapper #9039
Minor style cleanup #9030
Fix get_special_prop() build failure #9020
systemd encryption key support #8750 #8848
Drop redundant POSIX ACL check in zpl_init_acl() #9009
Export dnode symbols #9027
Ensure dsl_destroy_head() decrypts objsets #9021
Disable unused pathname::pn_path* (unneeded in Linux) #9025
Fixes: #8934 Large kmem_alloc #8934 #9011
Fix ZTS killed processes detection #9003
pkg-utils python sitelib for SLES15 #8969
Fix race in parallel mount's thread dispatching algorithm #8450 #8833 #8878
Fix dracut Debian/Ubuntu packaging #8990 #8991
Remove VERIFY from dsl_dataset_crypt_stats() #8976
Improve "Unable to automount" error message. #8959
Check b_freeze_cksum under ZFS_DEBUG_MODIFY conditional #8979
Fix error text for EINVAL in zfs_receive_one() #8977
Don't use d_path() for automount mount point for chroot'd process #8903 #8966
nopwrites on dmu_sync-ed blocks can result in a panic #8957
Avoid extra taskq_dispatch() calls by DMU #8909
-Y option for zdb is valid #8926
Fix error message on promoting encrypted dataset #8905 #8935
Fix out-of-tree build failures #8921 #8943
dn_struct_rwlock can not be held in dmu_tx_try_assign() #8929
Remove arch and relax version dependency #8914
Add libnvpair to libzfs pkg-config #8919
Let zfs mount all tolerate in-progress mounts #8881
zstreamdump: add per-record-type counters and an overhead counter #8432
Fix comments on zfs_bookmark_phys #8945
Add SCSI_PASSTHROUGH to zvols to enable UNMAP support #8933
Prevent pointer to an out-of-scope local variable #8924 #8940
dedup=verify doesn't clear the blkptr's dedup flag #8936
Update vdev_ops_t from illumos #8925
Allow unencrypted children of encrypted datasets #8737 #8870
Replace whereis with type in zfs-lib.sh #8920 #8938
Use ZFS_DEV macro instead of literals #8912
Fix memory leak in check_disk() #8897 #8911
kmod-zfs-devel rpm should provide kmod-spl-devel #8930
ZTS: Fix mmp_interval failure #8906
Minimize aggsum_compare(&arc_size, arc_c) calls. #8901
Python config cleanup #8895
lz4_decompress_abd declared but not defined #8894
panic in removal_remap test on 4K devices #8893
compress metadata in later sync passes #8892
Move write aggregation memory copy out of vq_lock #8890
Restrict filesystem creation if name referred either '.' or '..' #8842 #8564
ztest: dmu_tx_assign() gets ENOSPC in spa_vdev_remove_thread() #8889
Fix lockdep warning on insmod #8868 #8884
fat zap should prefetch when iterating #8862
Target ARC size can get reduced to arc_c_min #8864
Fix typo in vdev_raidz_math.c #8875 #8880
Improve ZTS block_device_wait debugging #8839
Block_device_wait does not return an error code #8839
Remove redundant redundant remove #8839
Fix logic error in setpartition function #8839
Allow metaslab to be unloaded even when not freed from #8837
Avoid updating zfs_gitrev.h when rev is unchanged #8860
l2arc_apply_transforms: Fix typo in comment #8822
Reduced IOPS when all vdevs are in the zfs_mg_fragmentation_threshold #8859
Drop objid argument in zfs_znode_alloc() (sync with OpenZFS) #8841
Remove vn_set_fs_pwd()/vn_set_pwd() (no need to be at / during insmod) #8826
grammar: it is / plural agreement #8818
Refactor parent dataset handling in libzfs zfs_rename() #8815
Update comments to match code #8759
Update descriptions for vnops #8767
Drop local definition of MOUNT_BUSY #8765
kernel timer API rework #8647
Thank you James. I see Minh working on patching lbuild to build zfs-0.7 for RHEL 8. Does Whamcloud plan to issue a Lustre release for RHEL 8 based on zfs-0.7?
Olaf - Here are a few of the tickets that are thought to be caused by or we saw much more frequently when we switched over to run with ZFS 0.8.1:
LU-11170, LU-12632, LU-12710, LU-4671, LU-12689, LU-12713 and LU-12706.
If I find more, I'll add the ticket numbers to the list.
Does someone know the LU- numbers for the DNE failures that are believed to be related to zfs-0.8.1?
Doesn't confuse me - It's "Revert" [name of previous patch]. It's a standard format (generated by Gerrit).
FYI, the revert to master has a confusing title. It reads, "LU-12336 build: Revert Update ZFS version to 0.8.1", which makes it sounds like you are revert to that version rather than reverting from that version.
Reverted from ZFS 0.8.1 back to 0.7.13 as default due to high occurrence of ZFS DNE failures.
Oleg Drokin (green@whamcloud.com) merged in patch https://review.whamcloud.com/36137/
Subject: LU-12336 build: Revert Update ZFS version to 0.8.1
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 98e19e1fd2b8e2cb4b626f531694e51fe26f1c2b
James Nunez (jnunez@whamcloud.com) uploaded a new patch: https://review.whamcloud.com/36137
Subject: LU-12336 build: revert ZFS version to 0.8.1
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 07db6f79833906a2c5eaf39816a6cdf80c36a751
ofaaland no - we're just looking at ways to keep things moving along