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* dgud/mnesia/ext-backend/PR-858/OTP-13058:
mnesia_ext: Add basic backend extension tests
mnesia_ext: reuse snmp field for ext updates
mnesia_ext: Create table/data containers from mnesia monitor not temporary processes
mnesia_ext: Implement ext copies index
mnesia_ext: Load table ext
mnesia_ext: Dumper and schema changes
mnesia_ext: Refactor mnesia_schema.erl
mnesia_ext: Ext support in fragmented tables
mnesia_ext: Backup handling
mnesia_ext: Create schema functionality
mnesia_ext: Add ext copies and db_fold to low level api
mnesia_ext: Refactor record_validation code
mnesia_ext: Add create_external and increase protocol version to monitor
mnesia_ext: Add ext copies to records
mnesia_ext: Add supervisor and behaviour modules
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Minimal impact when talking to older nodes.
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processes
Tables or data containers should be owned and monitored by mnesia_monitor and
should thus be created by that process.
Always create_table before loading it
We need to create tables for ram_copies at least before loading
them as they are intermittent. It is also needed to get mnesia
monitor as the parent and supervisor of the data storage.
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* dgud/mnesia/try-catch:
mnesia: Replace catch with try-catch
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Avoids building stacktraces where it is not needed and do
not mask errors, i.e. only catch the relevant classes in each try.
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If a DCD dump is desired on-demand, use the function
mnesia_controller:snapshot_dcd(Tables). Tables must be a list of
tables that have a local disc_copy, otherwise an error will be
returned. Once the operation actually executes, any table that doesn't
have a local disc_copy is ignored.
Specifically, the dump_log worker record has been changed to allow an
arity-0 fun instead of the default log dump. This fun will be executed
as if it were a normal log dump, and must return 'dumped'. This could
also be used to e.g. insert a backup operation between log dumps.
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Setting the new Mnesia parameter 'dump_disc_copies_at_startup' to
'false' will completely disable the DCD dumping while tables are being
loaded. If it is set to 'true' (the default), the same test will now
be performed as for normal dumps, i.e., using the 'dc_dump_limit'
parameter. Previously, the test performed at load time was different
from the one used at runtime, and caused a lot of unnecessary dumping
which slowed down the startup.
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* dgud/mnesia/read-sticky-bug/OTP-9786:
[mnesia] Read record from correct node
[mnesia] Fixed sticky read lock bug
[mnesia] Whitespace fixes
Conflicts:
lib/mnesia/src/mnesia_log.erl
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create_table
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Mainly to correctly clear dets tables. It may also be faster to use
the dedicated functions.
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* uw/mnesia-majority:
dialyzer warning on mnesia_tm
Add documentation text about majority checking
add mnesia_majority_test suite
where_to_wlock optimization + change_table_majority/2
bug in mnesia_tm:needs_majority/2
optimize sticky_lock maj. check
check majority for sticky locks
Write locks now check majority when needed.
Add {majority, boolean()} per-table option.
OTP-9304
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This could happen on ram_copies tables.
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That caused a 'log_header' entry to added to the disc_copies tables.
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