After fcb8d040 ("treewide: use Software Package Data Exchange
(SPDX) license identifiers"), many dual-licensed files were
left with empty comments on top. Remove them to avoid visual
noise.
Closes#10562
Instead of lengthy blurbs, switch to single-line, machine-readable
standardized (https://spdx.dev) license identifiers. The Linux kernel
switched long ago, so there is strong precedent.
Three cases are handled: AGPL-only, Apache-only, and dual licensed.
For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0),
reasoning that our changes are extensive enough to apply our license.
The changes we applied mechanically with a script, except to
licenses/README.md.
Closes#9937
Use per CF-id reference count instead, and use handles as result of
add operations. These must either be explicitly released or stored
(rp_set), or they will release the corresponding replay_position
upon destruction.
Note: this does _not_ remove the replay positioning ordering requirement
for mutations. It just removes it as a means to track segment liveness.
* Make it more like origin, i.e. based on wall clock time of app start
* Encode shard ID in the, RP segement ID, to ensure RP:s and segement names
are unique per shard
Origin
* Note: removed commitlog_test:test_allocation_failure because with
segments limited to 4GB -> mutation limited to 2GB, actually forcing
a fail is not guaranteed or even likely.
* Make it more like origin, i.e. based on wall clock time of app start
* Encode shard ID in the, RP segement ID, to ensure RP:s and segement names
are unique per shard
