monero/src/blockchain_utilities
2015-07-11 23:54:14 -07:00
..
blockchain_converter.cpp blockchain_utilities: Pass expected number of blocks when starting batch 2015-07-11 23:54:14 -07:00
blockchain_export.cpp Allow BlockchainLMDB to be opened in read-only mode 2015-05-16 01:34:58 -07:00
blockchain_import.cpp blockchain_utilities: Pass expected number of blocks when starting batch 2015-07-11 23:54:14 -07:00
bootstrap_file.cpp Rename "--block-number" option to "--block-stop" 2015-05-15 17:26:43 -07:00
bootstrap_file.h Rename src/blockchain_converter/ to src/blockchain_utilities/ 2015-05-08 14:24:51 -07:00
bootstrap_serialization.h Rename src/blockchain_converter/ to src/blockchain_utilities/ 2015-05-08 14:24:51 -07:00
CMakeLists.txt Rename src/blockchain_converter/ to src/blockchain_utilities/ 2015-05-08 14:24:51 -07:00
fake_core.h Optionally allow DB to know expected number of blocks at batch transaction start 2015-07-11 23:54:12 -07:00
README.md cleaning up, removing redundant files, renaming, fixing incorrect licenses 2015-05-31 13:40:18 +02:00

Monero Blockchain Utilities

Copyright (c) 2014-2015, The Monero Project

Introduction

For importing into the LMDB database, compile with DATABASE=lmdb

e.g.

DATABASE=lmdb make release

This is also the default compile setting on the blockchain branch.

By default, the exporter will use the original in-memory database (blockchain.bin) as its source. This default is to make migrating to an LMDB database easy, without having to recompile anything. To change the source, adjust SOURCE_DB in src/blockchain_utilities/bootstrap_file.h according to the comments.

Usage:

See also each utility's "--help" option.

Export an existing in-memory database

$ blockchain_export

This loads the existing blockchain, for whichever database type it was compiled for, and exports it to $MONERO_DATA_DIR/export/blockchain.raw

Import the exported file

$ blockchain_import

This imports blocks from $MONERO_DATA_DIR/export/blockchain.raw into the current database.

Defaults: --batch on, --batch size 20000, --verify on

Batch size refers to number of blocks and can be adjusted for performance based on available RAM.

Verification should only be turned off if importing from a trusted blockchain.

## use default settings to import blockchain.raw into database
$ blockchain_import

## fast import with large batch size, verification off
$ blockchain_import --batch-size 100000 --verify off

## LMDB flags can be set by appending them to the database type:
## flags: nosync, nometasync, writemap, mapasync
$ blockchain_import --database lmdb#nosync
$ blockchain_import --database lmdb#nosync,nometasync

Blockchain converter with batching

blockchain_converter has also been updated and includes batching for faster writes. However, on lower RAM systems, this will be slower than using the exporter and importer utilities. The converter needs to keep the blockchain in memory for the duration of the conversion, like the original bitmonerod, thus leaving less memory available to the destination database to operate.

$ blockchain_converter --batch on --batch-size 20000