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Bastian Köcher fdd5203add state-db: Print warning when using large pruning window on RocksDb (#13414 )

* state-db: Print warning when using large pruning window on RocksDb

This pr changes state-db to print a warning when using a large pruning window and running with a
database that isn't supporting ref-counting like RocksDb. This makes the user aware of potential out
of memory errors because this option together with RocksDb etc puts the entire pruning window into
memory. Besides that the pr introduces `LOG_TARGET` for having the target declared central!

* Review comments

2023-02-18 16:59:08 +00:00

src

state-db: Print warning when using large pruning window on RocksDb (#13414 )

2023-02-18 16:59:08 +00:00

Cargo.toml

Make DispatchError impl MEL (#13169 )

2023-01-19 16:47:47 +00:00

README.md

prepping for releasing rc6 (#6922 )

2020-08-20 17:04:42 +02:00

README.md

State database maintenance. Handles canonicalization and pruning in the database. The input to this module is a ChangeSet which is basically a list of key-value pairs (trie nodes) that were added or deleted during block execution.

Canonicalization.

Canonicalization window tracks a tree of blocks identified by header hash. The in-memory overlay allows to get any node that was inserted in any of the blocks within the window. The tree is journaled to the backing database and rebuilt on startup. Canonicalization function selects one root from the top of the tree and discards all other roots and their subtrees.

Pruning.

See RefWindow for pruning algorithm details. StateDb prunes on each canonicalization until pruning constraints are satisfied.

License: GPL-3.0-or-later WITH Classpath-exception-2.0