memcached | fully featured Memcached client build on top of Node.js | Key Value Database library
kandi X-RAY | memcached Summary
kandi X-RAY | memcached Summary
memcached is a fully featured Memcached client for Node.js. memcached is built with scaling, high availability and exceptional performance in mind. We use consistent hashing to store the data across different nodes. Consistent hashing is a scheme that provides a hash table functionality in a way that adding or removing a server node does not significantly change the mapping of the keys to server nodes. The algorithm that is used for consistent hashing is the same as libketama. There are different ways to handle errors for example, when a server becomes unavailable you can configure the client to see all requests to that server as cache misses until it goes up again. It's also possible to automatically remove the affected server from the consistent hashing algorithm or provide memcached with a failover server that can take the place of the unresponsive server. When these issues occur the memcached client will emit different events where you can subscribe to containing detailed information about the issues. The client is configurable on different levels. There's a global configuration that you update so all your Memcached clusters will use the same failure configuration for example, but it's also possible to overwrite these changes per memcached instance.
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QUESTION
I don't really know where the error is, for me, it's still a mystery. But I'm using Laravel 8 to produce a project, it was working perfectly and randomly started to return this error and all projects started to return this error too. I believe it's something with Redis, as I'm using it to store the system cache. When I go to access my endpoint in postman it returns the following error:
...ANSWER
Answered 2021-Jun-12 at 01:50Your problem is that you have set SESSION_CONNECTION=session, but your SESSION_DRIVER=default, so you have to use SESSION_DRIVER=database in your .env. See the config/session.php:
QUESTION
I am not able to upgrade to php7.3 from 7.2 on ubuntu 16.04, I run the following commands :
...ANSWER
Answered 2021-Jun-09 at 13:12Ondřej has removed support for 16.04 just a few days ago:
As of this moment, all the packages for the Ubuntu 16.04 LTS (Xenial) have been removed from the repositories.
This explains how it worked ok for you last week, but isn't working today.
QUESTION
We are looking to implement a redis based cache for read heavy data for fronting our database as a read through cache. I would like to implement a better invalidation mechanism than just TTL or LRU based eviction to prevent stale reads as much as possible.
Several databases provide notification mechanism for database objects such as tables. For example oracle has Change Notifications and Postgresql has NOTIFY for this purpose. Is there any existing open source project/component that listens to these notifications and uses them to invalidate out of process caches like redis or memcached? I have seen several projects for doing this to in-process caches but none so far for out of process (either clustered/unclustered) caches.
...ANSWER
Answered 2021-May-11 at 14:55Redis Labs announced their new "RedisCDC" solution at RedisConf 2021 which seamlessly migrates data from heterogeneous data sources to Redis and Redis Modules. Its configurable and extendable, so you can easily create a custom stage that invalidates Redis keys when there is an update or delete on the source side.
QUESTION
I'm trying to run a Symfony application in docker and initially I started off with a full ubuntu image, but now I want to strip it down to just php7.4-apache base image, but I'm having a strange issue with memcached. I will try to describe the issue, but first this is my ubuntu image:
ANSWER
Answered 2021-May-29 at 22:28Highly doubt that anyone would have the same scenario, but I solved it by just using a separate docker container for memcached and connecting my application to that instead.
QUESTION
I'm getting the error mentioned in the title and I'm out of ideas on how to fix it. The Error is in the ElasticacheCluster part. I tried to modify it in a lot of ways, that's why there's some commented line of code but I did not remove maybe they might help in the troubleshooting. This is my code below:
...ANSWER
Answered 2021-May-19 at 14:46Your cluster resource is not indented.
This should be working:
QUESTION
I'm final student who research and implement Openstack Victoria. When I configure Project: Octavia - Loadbalancer on multi-node - CentOS8, I have a issue. Seem like octavia.amphorae.drivers.haproxy.rest_api_driver couldn't connect to Amphora instance and port 9443 didn't run on my Network Node aka Octavia-API. In controller node, the amphora instance still running nornally. I follow https://www.server-world.info/en/note?os=CentOS_8&p=openstack_victoria4&f=11 to configure my lab. This is my cfg file below, pls help me to figure out. Regards!
I created lb_net in type vxlan and lb-secgroup, when i use command to create lb it still pending-create:
...ANSWER
Answered 2021-May-14 at 18:28Okay, my problem is fixed. The Octavia-api node can't connect to amphorae-instance because they do not match the same network type (node - LAN and amphorae - VXLAN). So, I create a bridge interface at a node to convert vxlan for lan can connect (You can read here at step 7: create a network).
Best regard!
QUESTION
The project seemed fine till yesterday, but suddenly , when I tried to start the server after some settings changes today, this error pops up everytime:
...ANSWER
Answered 2021-May-06 at 07:47In the deployment.py, you should wrap the 'debug_toolbar' string in a collection, for example a list, otherwise you will add one item per character to the INSTALLED_SETTINGS, and thus then you would load as apps 'd', 'e', 'b', etc.
You thus can rewrite this to:
QUESTION
Everything in my code is running my database(Postgresql) is using utf8 encoding, I've checked the php.ini file its encoding is utf8, I tried debugging to see if it was any of the functions I used that were doing this, but nothing everything is running as expected, however after my frontend sends a post request to backend server through curl for some text to be inserted in the database, some characters like 'da' are converted to '?' in postgre and in memcached, I think php is converting them to Latin-1 again after the request reaches the other side for some reason becuase I use utf8_encode before the request and utf8_decode on the other side
...ANSWER
Answered 2021-May-02 at 21:02Don't replace " " with "%".
Use urlencode and urldecode instead of utf8_encode and utf8_decode - It will give you a clean alphanumeric representation of any character to easily transport your data.
If everything in your environment defaults to UTF-8, you shouldn't need utf_encode and utf_decode anyways, I guess. But if you still do, you could try combining both like this:
QUESTION
This is my app.js and I want to perform both (Socket/Rest) But When I am emitting something from my client the socket is not connecting though it's showing me 101 Status in chrome ws. Can anyone help me out with what's wrong with this code?
here is my app.js
...ANSWER
Answered 2021-Apr-30 at 06:38when considering the only problem is connecting to socket io, your code should establish a bi directional connection between the client and the server, and it does.
The 101 message means switching protocols
so if you emit a message on event named test your server will catch it.
the problem is in your client side, try any ready to use tools like this or anything else to independently test your socket io server
QUESTION
What does "array" mean in this section? enter image description here
...ANSWER
Answered 2021-Apr-29 at 09:06Using the array cache driver, the cache will be stored in a PHP array, this feature is supposed to be used for testing purposes and for storing cache data for a single browser request, you can find more in the Laravel official docs:
https://laravel.com/docs/8.x/cache#configuration
To debug using this method you can do something like this: Put a key - value in cache:
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