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Merge pull request #1366 

67e910a Instructions for debugging LMDB crashes taken from #1360 (NanoAkron)
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Riccardo Spagni 2016-11-24 12:59:27 +02:00
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README.md
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@ -378,3 +378,20 @@ Note: rlwrap will save things like your seed and private keys, if you supply the
If you want to help out, see CONTRIBUTING for a set of guidelines.
# Debugging
This section contains general instructions for debugging failed installs or problems encountered with Monero. First ensure you are running the latest version built from the github repo.
## LMDB
Instructions for debugging suspected blockchain corruption as per @HYC
There is an `mdb_stat` command in the LMDB source that can print statistics about the database but it's not routinely built. This can be built with the following command:
`cd ~/monero/external/db_drivers/liblmdb && make`
The output of `mdb_stat -ea <path to blockchain dir>` will indicate inconsistencies in the blocks, block_heights and block_info table.
The output of `mdb_dump -s blocks <path to blockchain dir>` and `mdb_dump -s block_info <path to blockchain dir>` is useful for indicating whether blocks and block_info contain the same keys.
These records are dumped as hex data, where the first line is the key and the second line is the data.