Summary:
Previously we store sequence number range of each blob files, and use the sequence number range to check if the file can be possibly visible by a snapshot. But it adds complexity to the code, since the sequence number is only available after a write. (The current implementation get sequence number by calling GetLatestSequenceNumber(), which is wrong.) With the patch, we are not storing sequence number range, and check if snapshot_sequence < obsolete_sequence to decide if the file is visible by a snapshot (previously we check if first_sequence <= snapshot_sequence < obsolete_sequence).
Closes https://github.com/facebook/rocksdb/pull/3274
Differential Revision: D6571497
Pulled By: yiwu-arbug
fbshipit-source-id: ca06479dc1fcd8782f6525b62b7762cd47d61909
Summary:
Changing blob file format and some code cleanup around the change. The change with blob log format are:
* Remove timestamp field in blob file header, blob file footer and blob records. The field is not being use and often confuse with expiration field.
* Blob file header now come with column family id, which always equal to default column family id. It leaves room for future support of column family.
* Compression field in blob file header now is a standalone byte (instead of compact encode with flags field)
* Blob file footer now come with its own crc.
* Key length now being uint64_t instead of uint32_t
* Blob CRC now checksum both key and value (instead of value only).
* Some reordering of the fields.
The list of cleanups:
* Better inline comments in blob_log_format.h
* rename ttlrange_t and snrange_t to ExpirationRange and SequenceRange respectively.
* simplify blob_db::Reader
* Move crc checking logic to inside blob_log_format.cc
Closes https://github.com/facebook/rocksdb/pull/3081
Differential Revision: D6171304
Pulled By: yiwu-arbug
fbshipit-source-id: e4373e0d39264441b7e2fbd0caba93ddd99ea2af
Summary:
Previously each time we write a blob we write blog_record_header + key + value + blob_record_footer to blob log. The footer only contains a sequence and a crc for the sequence number. The sequence number was used in garbage collection to verify the value is recent. After #2703 we moved to use optimistic transaction and no longer use sequence number from the footer. Remove the footer altogether.
There's another usage of sequence number and we are keeping it: Each blob log file keep track of sequence number range of keys in it, and use it to check if it is reference by a snapshot, before being deleted.
Closes https://github.com/facebook/rocksdb/pull/3005
Differential Revision: D6057585
Pulled By: yiwu-arbug
fbshipit-source-id: d6da53c457a316e9723f359a1b47facfc3ffe090
Summary:
The current blob db implementation use mix of int32_t, uint32_t and uint64_t for TTL and expiration. Update all timestamps to uint64_t for consistency.
Closes https://github.com/facebook/rocksdb/pull/2683
Differential Revision: D5557103
Pulled By: yiwu-arbug
fbshipit-source-id: e4eab2691629a755e614e8cf1eed9c3a681d0c42
Summary:
We've got some DBs where iterators return Status with message "Corruption: block checksum mismatch" all the time. That's not very informative. It would be much easier to investigate if the error message contained the file name - then we would know e.g. how old the corrupted file is, which would be very useful for finding the root cause. This PR adds file name, offset and other stuff to some block corruption-related status messages.
It doesn't improve all the error messages, just a few that were easy to improve. I'm mostly interested in "block checksum mismatch" and "Bad table magic number" since they're the only corruption errors that I've ever seen in the wild.
Closes https://github.com/facebook/rocksdb/pull/2507
Differential Revision: D5345702
Pulled By: al13n321
fbshipit-source-id: fc8023d43f1935ad927cef1b9c55481ab3cb1339
Summary:
Fixing the build errors seen with GCC 4.8.1.
```
Makefile:105: Warning: Compiling in debug mode. Don't use the resulting binary in production
utilities/blob_db/blob_dump_tool.cc: In member function ‘rocksdb::Status rocksdb::blob_db::BlobDumpTool::DumpBlobLogFooter(uint64_t, uint64_t*)’:
utilities/blob_db/blob_dump_tool.cc:149:42: error: expected ‘)’ before ‘PRIu64’
fprintf(stdout, " Blob count : %" PRIu64 "\n", footer.GetBlobCount());
^
utilities/blob_db/blob_dump_tool.cc:149:76: error: spurious trailing ‘%’ in format [-Werror=format=]
fprintf(stdout, " Blob count : %" PRIu64 "\n", footer.GetBlobCount());
^
utilities/blob_db/blob_dump_tool.cc:149:76: error: too many arguments for format [-Werror=format-extra-args]
utilities/blob_db/blob_dump_tool.cc: In member function ‘rocksdb::Status rocksdb::blob_db::BlobDumpTool::DumpRecord(rocksdb::blob_db::BlobDumpTool::DisplayType, rocksdb::blob_db::BlobDumpTool::DisplayType, uint64_t*)’:
utilities/blob_db/blob_dump_tool.cc:161:49: error: expected ‘)’ before ‘PRIx64’
fprintf(stdout, "Read record with offset 0x%" PRIx64 " (%" PRIu64 "):\n",
^
utilities/blob_db/blob_dump_tool.cc:162:27: error: spurious trailing ‘%’ in format [-Werror=format=]
*offset, *offset);
^
utilities/blob_db/blob_dump_tool.cc:162:27: error: too many arguments for format [-Werror=format-extra-args]
utilities/blob_db/blob_dump_tool.cc:176:38: error: expected ‘)’ before ‘PRIu64’
fprintf(stdout, " blob size : %" PRIu64 "\n", record.GetBlobSize());
^
utilities/blob_db/blob_dump_tool.cc:176:71: error: spurious trailing ‘%’ in format [-Werror=format=]
fprintf(stdout, " blob size : %" PRIu64 "\n", record.GetBlobSize());
^
utilities/blob_db/blob_dump_tool.cc:176:71: error: too many arguments for format [-Werror=format-extra-args]
utilities/blob_db/blob_dump_tool.cc:178:38: error: expected ‘)’ before ‘PRIu64’
fprintf(stdout, " time : %" PRIu64 "\n", record.GetTimeVal());
^
utilities/blob_db/blob_dump_tool.cc:178:70: error: spurious trailing ‘%’ in format [-Werror=format=]
fprintf(stdout, " time : %" PRIu64 "\n", record.GetTimeVal());
^
utilities/blob_db/blob_dump_tool.cc:178:70: error: too many arguments for format [-Werror=format-extra-args]
utilities/blob_db/blob_dump_tool.cc:214:38: error: expected ‘)’ before ‘PRIu64’
fprintf(stdout, " sequence : %" PRIu64 "\n", record.GetSN());
^
utilities/blob_db/blob_dump_tool.cc:214:65: error: spurious trailing ‘%’ in format [-Werror=format=]
fprintf(stdout, " sequence : %" PRIu64 "\n", record.GetSN());
```
Closes https://github.com/facebook/rocksdb/pull/2359
Differential Revision: D5117684
Pulled By: sagar0
fbshipit-source-id: 7480346bcd96205fcae890927c5e68cf004e87be
