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ChangeLog
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ChangeLog
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release : 2.0.1 2015-03-03
: Solves a problem that made btier refuse to assemble when the
: name of the underlying devices had changed
release : 2.0.0 2015-01-18
: Fix a crash due to a list overflow
: Initial release of 2.0.0 thanks to : Jianjian Huo
release : 1.3.7 2014-09-12
: Enable threaded async IO for random read and BIO
release : 1.3.6 2014-09-12
: Signed-off-by, thanks to: Jianjian Huo
: Fix possible data corruption issue in write/read_tiered functions.
: Changed two functions to support kernel after 3.14.
: Fix the data corruption bugs during tiering data copy.
release : 1.3.5 2014-08-31
: Fix a data corruption issue causes by crossing 1MB boundaries
: This bug was a regression of 1.3.4.i
: Also fixed a bio memory leak. 1.3.4 was a bad release, Ouch!
: Added merge functionality to btier.
: The performance impact of these changes should be very noticeable.
: Especially when SAS or SATA drives are used.
: Tested these changes with md raid as well as normal drives and SSD's.
release : 1.3.4 2014-08-30
: Clone and submit bio at once when possible, instead of per bvec
: Reduce the number of parameters passed per call.
release : 1.3.3 2014-08-17
: Change the blocksize during data migration to use the
: maximum support size instead of always using 4k chunks.
: This considerably speeds up data migration when the bio mode
: is selected
release : 1.3.2 2014-08-16
: Make btier work with kernels >= 3.14
: Signed-off-by, thanks to: Jianjian Huo
: Fix a problem in btier-1.3.0 that would cause data corruption
: when data was migrated, while all storage devices lacked free space
: Prevent a kernel Oops when tiger hash support was not present
: in the kernel. Reported by / thanks to: Jianjian Huo
release : 1.2.6 2014-03-26
: Revert the zero filled block recognition since it caused data
: corruption. This was a real bad bug.
release : 1.2.5 2014-03-09
: Fix exceeding max segment size of underlying blockdevice up-on
: data migration
release : 1.2.4 2014-02-15
: Enable compilation on SleS11 and CentOS kernels
release : 1.2.3 2014-02-09
: Fix the use of a wrong pointer which could lead to data corruption
: This is a regression of the zero filled block recognition
release : 1.2.2 2014-02-08
: Added zero filled block recognition and skip writing them when
: possible. btier will return a block without meta data as zero
: filled by default.
release : 1.2.1 2014-01-30
: Reenable vfs for blockdevices. Due to this bug
: bio was always selected.
release : 1.2.0 2014-01-29
: Make it possible to use bio with real devices instead
: of vfs. See btier_setup.1
release : 1.1.3 2014-01-11
: Inspected the btier code with Coverity and solved the
: bugs it reported that where not false positives.
release : 1.1 2013-10-12
: Enabling or disabling writethrough is now persistently stored.
: Solved a problem that could cause data corruption.
: Discard can now be enabled /disabled via sysfs
: Discard to underlying devices can now be enabled / disabled
: via sysfs
release : 1.0.2 2013-06-08
: Added support for write-through VFS cache.
: btier_setup -s enables this new sync/writethrough capability.
: Solved a potential data corruption problem with aio_read.
release : 1.0.1 2013-05-28
: Added a uuid for btier devices available under
: /sys/block/sdtierX/tier/uuid
release : 1.0.0 2013-05-26
: Added a data migration tool that was contributed
: by : Stephan Budach. Changed the version number to 1.0.0
release : 0.9.9.9-8 2013-04-14
: Added a new tool to allow easy metadata backup and restore
: Solved a bug that caused btier to crash up-on recovery
: when a rollback of pending migration was necessary.
release : 0.9.9.9-7 2013-03-31
: Userspace programs can now retrieve information in paged
: mode. Paged mode allows to retrieve information in batches
: of 20 blocks at a time.
release : 0.9.9.9-6 2013-03-31
: Check if a device is still mounted when deregister is called
: Fix a problem with migration that was introduced with 0.9.9.9-5
release : 0.9.9.9-5 2013-03-17
: Implemented a userspace API via sysfs that allows
: userspace programs to retrieve block metadata
: and control data migration.
: tools/show_block_details.py and tools/show_block_details.sh
: are examples of how this interface can be used.
: TODO: Documentation of this API.
release : 0.9.9.9-4 2013-03-17
: Improved some logging routines
: Code cleaning
release : 0.9.9.9-3 2013-03-16
: Solves a nasty bug that can cause loss of data when
: btier is used with SSD's and a recent kernel that
: supports discard / trim. Upgrading is highly recommended
: for users with SSD's.
release : 0.9.9.9-1 2013-03-06
: Excuses for the version numbering but we are not quite
: at 1.0, although we are getting close.
: Random read performance is now 4* higher.
: This was achieved by using a threaded worker pool
: for random reads. (aio).
: Migration policies are now stored on disk and not lost
: after unloading the device.
release : 0.9.9.9 2013-02-27
: Many small bug fixes and code (style) changes
: The kernel module can now be build in-tree as well.
release : 0.9.9.7 2013-02-12
: btier now disables readahead on the fly when it
: detects random io.
release : 0.9.9.4 2013-02-02
: The control device tiercontrol was
: registered with the full pathname.
: This caused slackware to show the device as
: /dev/dev/tiercontrol instead of /dev/tiercontrol
release : 0.9.9.3 2013-01-28
: No longer panic on fatal errors
: return -EIO instead
release : 0.9.9.2 2013-01-23
: Improved locking on migration
release : 0.9.9 2013-01-23
: Solves a bug that can lead to the tier device running
: out of space when there still is space available.
: tier has been renamed to btier so that google returns
: usable results.
: Code has been reviewed for stability and now passes
: long running tests.
release : 0.5.5 2013-01-12
: Tier now fully supports TRIM/DISCARD.
release : 0.5.0 2013-01-09
: Random IO performance has been improved.
: Started to implement synchronous replication.
release : 0.4.6 2012-12-27
: Tier now caches the bitlists as well.
release : 0.4.5 2012-12-24
: Tier now loads the blocklist (metadata) in memory
: to further enhance the performance.
: Code cleanups.
release : 0.4.3 2012-12-05
: Tier can now handle resizing of underlying disks.
release : 0.4.0 2012-12-05
: Partially implements expansion of underlying disks.
release : 0.3.2 2012-11-29
: This release changes the devicename from /dev/tierX
: to /dev/sdtierX. Reason for the change is that LVM
: filters out the old name and is therefore not usable
: with tier.
release : 0.3.1 2012-10-03
: Migration engine has been improved.
: Sysfs interface for device_usage and migration_policy
: are now more polished. Devicesize change is now
: detected. Implementation of automatic resizing is
: still something todo.
release : 0.2.9 2012-09-22
: The migration policy can now be changed via sysfs
: For details see README.sysfs
release : 0.2.7 2012-08-21
: Some minor fixes
: barriers are now enabled by default
: and tier now again compiles on older kernels
release : 0.2.6 2012-07-16
: echo 1/0 >/sys/block/tiera/tier/barriers
: echo 1/0 >/sys/block/tiera/tier/ptsync
release : 0.2.5 2012-07-16
: TIER now works with iostat
: improved deregistering of the module
release : 0.2.3 2012-07-14
: Solved a potential core dump when disabling migration
: Added support to change the migration interval via sysfs
release : 0.2.3 2012-07-12
: Add the option to enable / disable the data migration
: process. So migration can now be disabled by simply:
: echo 1 >/sys/block/tiera/tier/disable_migration
release : 0.2.2 2012-07-08
: Adds an overview of the amount of space used per tier device
: cat /sys/block/tiera/tier/device_usage
: TIER DEVICE SIZE MB ALLOCATED MB
: 0 ssd.img 100 1
: 1 sas.img 150 31
:
release : 0.2.1 2012-07-08
: Added some ifdef's to enable compilation on older kernels
release : 0.2.0 2012-07-04
: Added recovery from unexpected power downs and crashes
: Now automatically detects device order
: Refuses to load when the devices are not initialized with -c
Initial release : 0.1.0 2012-06-09
Resolved problems :
Known problems :