#### Problem
Building new algorithm for packing ancient storage. Packing will occur
in 1 pass across multiple ancient slots.
This will be put in 1 dead code piece at a time with tests until all
pieces are present. Switch between current packing algorithm and this
new one is in a validator cli argument. Resulting append vecs are
correct and compatible (as a set) either way. When a new storage format
optimized for cold storage becomes available, it will only work with
this new packing algorithm, so the change will need to be complete prior
to the new storage format.
#### Summary of Changes
Add `ancient calc_accounts_to_combine` to separate accounts to prepare
for creating packed ancient append vecs. This will be used soon.
Fixes #
<!-- OPTIONAL: Feature Gate Issue: # -->
<!-- Don't forget to add the "feature-gate" label -->
Bumps [libloading](https://github.com/nagisa/rust_libloading) from 0.7.3
to 0.7.4.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="6e284984ae"><code>6e28498</code></a>
Fix CI</li>
<li><a
href="95a0f62e8f"><code>95a0f62</code></a>
Placate clippy</li>
<li><a
href="224a3def35"><code>224a3de</code></a>
Release 0.7.4</li>
<li><a
href="bd17713dcc"><code>bd17713</code></a>
Support AIX dyld constants</li>
<li><a
href="6e07929736"><code>6e07929</code></a>
fix typo</li>
<li><a
href="6b33651a90"><code>6b33651</code></a>
Construct a PathBuf</li>
<li><a
href="964dd8b4c0"><code>964dd8b</code></a>
Simplify lib_path</li>
<li><a
href="8009f51a9f"><code>8009f51</code></a>
Honor Cargo's target directory when building LIBPATH</li>
<li><a
href="842e377ae4"><code>842e377</code></a>
Fix a typo in the CI scripts</li>
<li>See full diff in <a
href="https://github.com/nagisa/rust_libloading/compare/0.7.3...0.7.4">compare
view</a></li>
</ul>
</details>
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Signed-off-by: dependabot[bot] <support@github.com>
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Duplicate-shreds handler is using a nested hash-map for the incomplete
chunks buffered. This is resulting in a convoluted logic to limit the
number of entries:
https://github.com/solana-labs/solana/blob/427bd6264/gossip/src/duplicate_shred_handler.rs#L62
This commit instead uses a flat buffer mapping (Slot, Pubkey) pairs to
the respective duplicate shreds chunks. The buffer is allowed to grow to
twice the intended capacity, at which point the extraneous entries are
removed in linear time, resulting an amortized O(1) performance.
Dynamic dispatch forces heap allocation and adds extra overhead.
Dynamic casting as in the ones below, lacks compile-time type safety:
https://github.com/solana-labs/solana/blob/eeb622c4e/quic-client/src/lib.rs#L172-L175https://github.com/solana-labs/solana/blob/eeb622c4e/udp-client/src/lib.rs#L52-L55
The commit removes all instances of Any, Box<dyn ...>, and Arc<dyn ...>,
and instead uses generic and associated types.
There are only two protocols QUIC and UDP; and the code which has to
work with both protocols can use a trivial thin enum wrapper.
With respect to connection-cache specifically:
* connection-cache/ConnectionCache is a single protocol cache which
allows to use either QUIC or UDP without any build dependency on the
other protocol.
* client/ConnectionCache is an enum wrapper around both protocols and
can be used in the code which has to work with both QUIC and UDP.
Co-authored-by: Tyera Eulberg <tyera@solana.com>