bdccd3e3f7
This adds a Flush method to the DB interface so that users of the DB type can flush the underlying database to disk as needed. The immediate use case for this is to allow for flushing dependencies. For example, the block database always needs to be flushed to disk prior to the UTXO database being flushed to disk to ensure that the UTXO database remains in a recoverable state in the event of an unclean shutdown. |
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| .. | ||
| cmd/dbtool | ||
| ffldb | ||
| internal/treap | ||
| testdata | ||
| doc.go | ||
| driver_test.go | ||
| driver.go | ||
| error_test.go | ||
| error.go | ||
| example_test.go | ||
| go.mod | ||
| go.sum | ||
| interface.go | ||
| log.go | ||
| README.md | ||
database
Package database provides a block and metadata storage database.
Please note that this package is intended to enable dcrd 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 dcrd.
When a client wants programmatic access to the data provided by dcrd, they'll likely want to use the dcrrpcclient package which makes use of the JSON-RPC API.
However, this package could be extremely useful for any applications requiring Decred block storage capabilities.
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
- Decred 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
Installation
$ go get github.com/decred/dcrd/database2
Examples
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Basic Usage Example Demonstrates creating a new database and using a managed read-write transaction to store and retrieve metadata.
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Block Storage and Retrieval Example 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.