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Uddipta Maity b55e2165be Rocksdb backup can store optional application specific metadata 
Summary:
Rocksdb backup engine maintains metadata about backups in separate files. But,
there was no way to add extra application specific data to it. Adding support
for that.
In some use cases, applications decide to restore a backup based on some
metadata. This will help those cases to cheaply decide whether to restore or
not.

Test Plan:
Added a unit test. Existing ones are passing

Sample meta file for BinaryMetadata test-

```

1459454043
0
metadata 6162630A64656600676869
2
private/1/MANIFEST-000001 crc32 1184723444
private/1/CURRENT crc32 3505765120

```

Reviewers: sdong, ldemailly, andrewkr

Reviewed By: andrewkr

Subscribers: andrewkr, dhruba, ldemailly

Differential Revision: https://reviews.facebook.net/D56007
2016-04-01 10:56:52 -07:00
..
utilities Rocksdb backup can store optional application specific metadata 2016-04-01 10:56:52 -07:00
c.h Adding pin_l0_filter_and_index_blocks_in_cache feature and related fixes. 2016-04-01 10:42:39 -07:00
cache.h Adding pin_l0_filter_and_index_blocks_in_cache feature and related fixes. 2016-04-01 10:42:39 -07:00
compaction_filter.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
compaction_job_stats.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
comparator.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
convenience.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_bench_tool.h Separeate main from bench functionality to allow cusomizations 2016-02-16 06:17:31 -08:00
db_dump_tool.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db.h Change Property name from "rocksdb.current_version_number" to "rocksdb.current-super-version-number" 2016-03-04 18:15:29 -08:00
env.h Make WritableFileWrapper not screw up preallocation 2016-03-23 09:14:56 -07:00
experimental.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
filter_policy.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
flush_block_policy.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
immutable_options.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
iostats_context.h IOStatsContext::ToString() add option to exclude zero counters 2016-02-23 10:26:24 -08:00
iterator.h Change Property name from "rocksdb.current_version_number" to "rocksdb.current-super-version-number" 2016-03-04 18:15:29 -08:00
ldb_tool.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
listener.h Fix lite_build 2015-12-22 11:58:13 -08:00
memtablerep.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
merge_operator.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
metadata.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
options.h Change some RocksDB default options 2016-03-31 17:12:18 -07:00
perf_context.h Add comments to perf_context skip counters 2016-03-23 14:26:25 -07:00
perf_level.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
rate_limiter.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
slice_transform.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
slice.h to/from hex refactor 2016-03-30 14:36:48 -07:00
snapshot.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
sst_dump_tool.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
sst_file_manager.h Introduce SstFileManager::SetMaxAllowedSpaceUsage() to cap disk space usage 2016-02-17 15:20:23 -08:00
sst_file_writer.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
statistics.h Cache to have an option to fail Cache::Insert() when full 2016-03-10 17:35:19 -08:00
status.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
table_properties.h Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
table.h Adding pin_l0_filter_and_index_blocks_in_cache feature and related fixes. 2016-04-01 10:42:39 -07:00
thread_status.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
transaction_log.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
types.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
universal_compaction.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
version.h Update current version to 4.6 2016-03-01 14:26:44 -08:00
wal_filter.h Avoid overloaded virtual function 2016-03-22 17:10:31 -07:00
write_batch_base.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_batch.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00