Switch Redis plugin

[szepeviktor]

Till Krüss is a very good developer but Daniel produces a better plugin:
https://github.com/pantheon-systems/wp-redis

Please consider switching.

[ottok]

I see you are one of the authors. What other aspects makes it better? :)

[szepeviktor]

The sentence SOME_STATEMENT but Daniel produces a better plugin is always true as Daniel works only for enterprise customers.

There is a high tension between plugin authors: there are enterprise and popular guys.
Enterprise guys produce plugins for controlled and optimized environments, popular guys target clients with shared hosting, and selling pro versions.

• See tests and be shocked!
• Till's plugins has uninstall.php which makes no sense
• predis is surely not for optimized servers as the PECL extension is written in C
• Cluster support
• overall code quality
• why I chose to contribute to wp-redis, not to the other one

[ottok]

I have now started a test with this. At least the wp-cli interface is rather nice:

$ wp redis info
+-------------------+-----------+
| Field             | Value     |
+-------------------+-----------+
| status            | connected |
| used_memory       | 29.59M    |
| uptime            | 0 days    |
| key_count         | 36960     |
| instantaneous_ops | 2005/sec  |
| lifetime_hitrate  | 44.67%    |
| redis_host        | null      |
| redis_port        | 6379      |
| redis_auth        |           |
| redis_database    | 0         |
+-------------------+-----------+

[ottok]

The vanilla Redis stats in comparison:

$ redis-cli info stats
# Stats
total_connections_received:29309
total_commands_processed:143619952
instantaneous_ops_per_sec:24
rejected_connections:0
sync_full:0
sync_partial_ok:0
sync_partial_err:0
expired_keys:20
evicted_keys:16105240
keyspace_hits:11539283
keyspace_misses:14112309
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:0

[JoosuaKoskinen]

Haven't really looked into this yet. The current object-cache has had some problems but they were mostly to do with the sites code. Also note that Seravo-Plugin parses the redis-cli info output so it would need a rewrite too.

Will do some comparing later but there should be a real benefit for the change.

[szepeviktor]

real benefit

The benefit is sustainability.

[JoosuaKoskinen]

Till Krüss's object-cache has improved a lot lately and I don't think changing the object-cache is a good idea. There's no performance difference, we don't have any problems with the Till Krüss's object-cache anymore and the change could introduce new issues. Closing for now! We might look in to change in the general Redis improvements issue.