Modifications of this PR:
1. Support the verification of `Multi Part AOF`, while still maintaining support for the
old-style `AOF/RDB-preamble`. `redis-check-aof` will automatically choose which
mode to use according to the incoming file format.
`Usage: redis-check-aof [--fix|--truncate-to-timestamp $timestamp] <AOF/manifest>`
2. Refactor part of the code to make it easier to understand
3. Currently only supports truncate (`--fix` or `--truncate-to-timestamp`) the last AOF
file (may be `BASE` or `INCR`)
The reasons for 3 above:
- for `--fix`: Only the last AOF may be truncated, this is guaranteed by redis
- for `--truncate-to-timestamp`: Normally, we only have `BASE` + `INCR` files
at most, and `BASE` cannot be truncated(It only contains a timestamp annotation
at the beginning of the file), so only `INCR` can be truncated. If we have a
`BASE+INCR1+INCR2` file (meaning we have an interrupted AOFRW), Only `INCR2`
files can be truncated at this time. If we still insist on truncate `INCR1`, we need to
manually delete `INCR2` and update the manifest file, then re-run `redis-check-aof`
- If we want to support truncate any file, we need to add very complicated code to support
the atomic modification of multiple file deletion and update manifest, I think this is unnecessary
Add timestamp annotation in AOF, one part of #9325.
Enabled with the new `aof-timestamp-enabled` config option.
Timestamp annotation format is "#TS:${timestamp}\r\n"."
TS" is short of timestamp and this method could save extra bytes in AOF.
We can use timestamp annotation for some special functions.
- know the executing time of commands
- restore data to a specific point-in-time (by using redis-check-rdb to truncate the file)
networking related stuff moved into networking.c
moved more code
more work on layout of source code
SDS instantaneuos memory saving. By Pieter and Salvatore at VMware ;)
cleanly compiling again after the first split, now splitting it in more C files
moving more things around... work in progress
split replication code
splitting more
Sets split
Hash split
replication split
even more splitting
more splitting
minor change
