Installing Laravel Predis and Phpiredis

When using AWS ElastiCache,\ Laravel phpredis does not automatically split reads and writes.\ However, AWS Redis only supports cluster or single-replica mode... As of now, Laravel seems to be lacking something when it comes to using an AWS Redis cluster... Maybe I just haven't studied enough. They say to use HAProxy, twemproxy, or dynomite to split this up... It might be better to set things up this way, but I decided to just use Predis.\ If you use HAProxy, you'd also have to set up another server for high availability, and if HAProxy then runs into problems, you could end up unable to use it at all. Predis's biggest drawback is that it can be 10% to 100% slower than phpredis. Anyway, as for how to install it,\ you install Predis, and there's information saying that you can reduce the performance loss by using phpiredis, which is written in C. ``` # Install RUN cd /usr/src/ \ && curl -fsSL https://github.com/redis/hiredis/archive/v1.0.2.tar.gz -o hiredis.tar.gz \ && mkdir -p hiredis \ && tar -xf hiredis.tar.gz -C hiredis --strip-components=1 \ && cd hiredis \ && make \ && make install \ && cp hiredis.h /usr/include/hiredis \ && ldconfig ``` This installs hiredis. (phpiredis needs it.) ``` # Install phpiredis && cd /usr/src/php/ext \ && curl -fsSL https://github.com/nrk/phpiredis/archive/v1.1.tar.gz -o phpiredis.tar.gz \ && mkdir -p phpiredis \ && tar -xf phpiredis.tar.gz -C phpiredis --strip-components=1 \ && rm phpiredis.tar.gz \ && docker-php-ext-configure phpiredis --enable-phpiredis \ && docker-php-ext-install phpiredis \ && rm -rf phpiredis \ ``` This will install the latest version, 1.1. ![](/storage/media/253/conversions/image-1024x162-webp.webp) Then it should look like the above. ``` 'client' => env('REDIS_CLIENT', 'phpredis'), 'cluster' => true, 'options' => [ 'cluster' => env('REDIS_CLUSTER', 'redis'), 'prefix' => env('REDIS_PREFIX', Str::slug(env('APP_NAME', 'laravel'), '_').'_database_'), 'replication' => true, 'connections' => [ 'tcp' => 'Predis\Connection\PhpiredisStreamConnection', // PHP stream resources 'unix' => 'Predis\Connection\PhpiredisSocketConnection', // ext-socket resources ], ], 'clusters' => [ 'default' => [ // masters [ 'host' => env('REDIS_SHARD_1_HOST', '127.0.0.1'), 'password' => env('REDIS_PASSWORD', null), 'port' => env('REDIS_SHARD_1_PORT', 6379), 'database' => 0, 'alias' => 'master', 'read_write_timeout' => 60, ], // slaves (replicas) [ 'host' => env('REDIS_SHARD_1_HOST_REPLICA', '127.0.0.1'), 'password' => env('REDIS_PASSWORD', null), 'port' => env('REDIS_SHARD_1_PORT_REPLICA', 6379), 'database' => 0, 'read_write_timeout' => 60, ], ], ], ``` In that state, just configure the database config above. REDIS_CLIENT=predis Of course, you need to set the value above. Then it works... But the problem here is that no matter how many tests I run, 'tcp' => 'Predis\Connection\PhpiredisStreamConnection', there's absolutely no difference in performance whether I use it or not!! Perhaps performance improvements only show up with Redis queries sent in pipeline form? Hmm...

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