How To Enable igbinary Serializers for Redis?

[andisugandi]

Hi all,

I am running Moodle 4.2.1 on Docker Swarm Cluster by using moodlehq/moodle-php-apache:8.1 based container image.

This container runs PHP 8.1 with the available serializers for Redis are: php and json only.

php -i | grep -A 4 'Redis Support' 

Redis Support => enabled
Redis Version => 5.3.7
Redis Sentinel Version => 0.1
Available serializers => php, json

Expected Serializers

The available serializers for Redis are: php, json, and igbinary:

Available serializers => php, json, igbinary

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What do you suggest to solve the issue?

Any helps is very much appreciated.

Thank you in advance.

[stronk7]

Thanks for reporting this @andisugandi ,

I'll take a look because I think that recent PHP / Redis versions switched the default to not install the support for igbinary by default.

The reason is that, for PHP 8.0 and up, its PHP serializer was improved a lot and was comparable (or better) than the igbinary one (on fact, internally... it sounds to me that it's igbinary, no matter the extension is not installed).

So, while I'll try to make the igbinary serializer to be available for redis... I'd recommend you to do some perf. testing, because maybe the PHP one is now quicker.

Also, note that the moodlehq/moodle-php-apache images are intended for development, so they may come with settings not ideal for production environments, be warned!

Ciao :-)

[stronk7]

Note that this has been fixed and the images are being regenerated right now. It will take a few hours to get them available.

Ciao :-)