kvdb wrapper for etcd #4015
kvdb wrapper for etcd #4015
Commits on May 22, 2020
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channeldb+kvdb: an extended STM on top of etcd clientv3
This commit adds an extended STM, similar to what available in etcd's clientv3 module. This incarnation of said STM supports additional features, like positioning in key intervals while taking into account deletes and writes as well. This is a preliminary work to support all features of the kvdb interface.
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channeldb+kvdb: walletdb/kvdb interface etcd implementation
This commit adds a full interface implementation of the walletdb/kvdb interface with detailed tests.
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channeldb+kvdb: add walletdb interface test
This commit adds walletdb interface test suite to the existing test set.
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kvdb+etcd: extend kvdb and STM with stats
The commit itslef adds stats to the transactions such that we can see how LND behaves with and etcd backend.
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lncfg: add configuration for user specified db backend
This commit extends lncfg to support user specified database backend. This supports configuration for both bolt and etcd (while only allowing one or the other).
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channeldb+lnd: make channeldb backend configurable
This commit adds support for user configured channeldb backend.
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kvdb+etcd: only lock on bucket path mod revision for reads and writes
This commit reduces the compare set size the STM will submit in transactions by adding only the bucket keys along the bucket path to a specific lock set. This lock set then used to filter the read set, effectively removing all read only keys from the transaction predicate that are not bucket keys. By tracking if a read-write tx actually changes something, we can also "bump" the mod revision of the bucket keys. With this trick we essentially implement a read-write lock for our bucket structure greatly reducing transaction processing time.
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kvdb+channeldb: create ExtendedBackend interface to allow rich tx logic
This commit adds the ExtendedBackend interface which is an extension to the walletdb.DB interface. This paves the way to using etcd.db.View and etcd.db.Update in the global View and Update functions without much code rewrite.
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This commit extends lncfg with etcd TLS config and passes these parameters to the etcd client upon construction.
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kvdb+lncfg: fully move etcd behind build tag
This commit separates all etcd related sources (sans a few stubs and config) from the rest of the source tree and makes compilation conditional depending on whether the kvdb_etcd build tag is specified.
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etcd: add namespace support to separate key spaces
This commit extends etcd db with namespaces without additional storage space requirements. This is simply done by instead of using an all zero root bucket id, we use the sha256 hash of the name space as our root bucket id.
