f45db028db
This removes the intermediate transaction log that was introduced as a part of the database cache as a workaround for leveldb batches causing massive memory usage spikes in favor of the recently introduced leveldb transaction interface which no longer has the memory usage issues. This approach is preferred because it can avoid the extra memory needed for the transaction log and therefore all of the intermediate states as well. As a result, the default cache size has been doubled since it equals roughly the same amount of overall memory usage and the flush interval has been raised as well. |
||
|---|---|---|
| .. | ||
| cmd/dbtool | ||
| ffldb | ||
| internal/treap | ||
| testdata | ||
| doc.go | ||
| driver.go | ||
| driver_test.go | ||
| error.go | ||
| error_test.go | ||
| example_test.go | ||
| export_test.go | ||
| interface.go | ||
| log.go | ||
| log_test.go | ||
| README.md | ||
database
[
]
(https://travis-ci.org/btcsuite/btcd)
Package database provides a block and metadata storage database.
Please note that this package is intended to enable btcd to support different database backends and is not something that a client can directly access as only one entity can have the database open at a time (for most database backends), and that entity will be btcd.
When a client wants programmatic access to the data provided by btcd, they'll likely want to use the btcrpcclient package which makes use of the [JSON-RPC API] (https://github.com/btcsuite/btcd/tree/master/docs/json_rpc_api.md).
However, this package could be extremely useful for any applications requiring Bitcoin block storage capabilities.
As of July 2015, there are over 365,000 blocks in the Bitcoin block chain and and over 76 million transactions (which turns out to be over 35GB of data). This package provides a database layer to store and retrieve this data in a simple and efficient manner.
The default backend, ffldb, has a strong focus on speed, efficiency, and robustness. It makes use of leveldb for the metadata, flat files for block storage, and strict checksums in key areas to ensure data integrity.
Feature Overview
- Key/value metadata store
- Bitcoin block storage
- Efficient retrieval of block headers and regions (transactions, scripts, etc)
- Read-only and read-write transactions with both manual and managed modes
- Nested buckets
- Iteration support including cursors with seek capability
- Supports registration of backend databases
- Comprehensive test coverage
Documentation
[
]
(http://godoc.org/github.com/btcsuite/btcd/database)
Full go doc style documentation for the project can be viewed online without
installing this package by using the GoDoc site here:
http://godoc.org/github.com/btcsuite/btcd/database
You can also view the documentation locally once the package is installed with
the godoc tool by running godoc -http=":6060" and pointing your browser to
http://localhost:6060/pkg/github.com/btcsuite/btcd/database
Installation
$ go get github.com/btcsuite/btcd/database
Examples
-
[Basic Usage Example] (http://godoc.org/github.com/btcsuite/btcd/database#example-package--BasicUsage)
Demonstrates creating a new database and using a managed read-write transaction to store and retrieve metadata. -
[Block Storage and Retrieval Example] (http://godoc.org/github.com/btcsuite/btcd/database#example-package--BlockStorageAndRetrieval)
Demonstrates creating a new database, using a managed read-write transaction to store a block, and then using a managed read-only transaction to fetch the block.
License
Package database is licensed under the copyfree ISC License.