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Merge pull request #2349 from tendermint/release/v0.24.0

update UPGRADING.md and minor docs fixes
pull/2354/head
Ethan Buchman 6 years ago
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3 changed files with 45 additions and 8 deletions
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      CHANGELOG.md
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      UPGRADING.md
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      docs/spec/software/abci.md

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CHANGELOG.md View File

@ -9,9 +9,13 @@ peerlink, Ahmah2009, bluele, b00f.
This release includes breaking upgrades in the block header,
including the long awaited changes for delaying validator set updates by one
block. It also fixes enforcement on the max size of blocks, and includes a BFT
timestamp in each block that can be safely used by applications. There are also some
minor breaking changes to the rpc, config, and ABCI.
block to better support light clients.
It also fixes enforcement on the maximum size of blocks, and includes a BFT
timestamp in each block that can be safely used by applications.
There are also some minor breaking changes to the rpc, config, and ABCI.
See the [UPGRADING.md](UPGRADING.md#v0.24.0) for details on upgrading to the new
version.
From here on, breaking changes will be broken down to better reflect how users
are affected by a change.
@ -20,6 +24,8 @@ A few more breaking changes are in the works - each will come with a clear
Architecture Decision Record (ADR) explaining the change. You can review ADRs
[here](https://github.com/tendermint/tendermint/tree/develop/docs/architecture)
or in the [open Pull Requests](https://github.com/tendermint/tendermint/pulls).
You can also check in on the [issues marked as
breaking](https://github.com/tendermint/tendermint/issues?q=is%3Aopen+is%3Aissue+label%3Abreaking).
BREAKING CHANGES:
@ -84,6 +90,7 @@ FEATURES:
IMPROVEMENTS:
- [docs] Lint documentation with `write-good` and `stop-words`.
- [docs] [\#2249](https://github.com/tendermint/tendermint/issues/2249) Refactor, deduplicate, and improve the ABCI docs and spec (with thanks to @ttmc).
- [scripts] [\#2196](https://github.com/tendermint/tendermint/issues/2196) Added json2wal tool, which is supposed to help our users restore (@bradyjoestar)
corrupted WAL files and compose test WAL files (@bradyjoestar)
- [mempool] [\#2234](https://github.com/tendermint/tendermint/issues/2234) Now stores txs by hash inside of the cache, to mitigate memory leakage


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UPGRADING.md View File

@ -3,10 +3,11 @@
This guide provides steps to be followed when you upgrade your applications to
a newer version of Tendermint Core.
## Upgrading from 0.23.0 to 0.24.0
## v0.24.0
New 0.24.0 release contains a lot of changes to the state and types. It's not
compatible to the old versions.
compatible to the old versions and there is no straight forward way to update
old data to be compatible with the new version.
To reset the state do:
@ -14,10 +15,12 @@ To reset the state do:
$ tendermint unsafe_reset_all
```
Here we summarize some other notable changes to be mindful of.
### Config changes
`p2p.max_num_peers` was removed in favor of `p2p.max_num_inbound_peers` and
`p2p.max_num_outbound_peers`.
`p2p.max_num_outbound_peers`.
```
# Maximum number of inbound peers
@ -28,5 +31,32 @@ max_num_outbound_peers = 10
```
As you can see, the default ratio of inbound/outbound peers is 4/1. The reason
as we want it to be easier for new nodes to connect to the network. You can
is we want it to be easier for new nodes to connect to the network. You can
tweak these parameters to alter the network topology.
### RPC Changes
The result of `/commit` used to contain `header` and `commit` fields at the top level. These are now contained under the `signed_header` field.
### ABCI Changes
The header has been upgraded and contains new fields, but none of the existing
fields were changed, except their order.
The `Validator` type was split into two, one containing an `Address` and one
containing a `PubKey`. When processing `RequestBeginBlock`, use the `Validator`
type, which contains just the `Address`. When returning `ResponseEndBlock`, use
the `ValidatorUpdate` type, which contains just the `PubKey`.
### Validator Set Updates
Validator set updates returned in ResponseEndBlock for height `H` used to take
effect immediately at height `H+1`. Now they will be delayed one block, to take
effect at height `H+2`. Note this means that the change will be seen by the ABCI
app in the `RequestBeginBlock.LastCommitInfo` at block `H+3`.
### Block Size
The `ConsensusParams.BlockSize.MaxTxs` was removed in favour of
`ConsensusParams.BlockSize.MaxBytes`, which is now enforced. This means blocks
are limitted only by byte-size, not by number of transactions.

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docs/spec/software/abci.md View File

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# Application Blockchain Interface (ABCI)
This page has [moved](../spec/abci/apps.md).
This page has [moved](../abci/apps.md).

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