started the Redis project. He was working on a real-time web analytics solution
and found that MySQL could not provide the necessary performance. June 2009
...
... data storage systems. Like MongoDB, memcached, CouchDB, and Redis .....
for news and articles. P.S. I'm writing a Redis book a little like this presentation.
Re-sharding - moving data All the new keys for slot 7 will be created / updated in D. All the old keys in C will be moved to D by redis-trib using
redis-server running the client ./redis-cli exists key. Test if specified
key exists. Return: 1 if exists, 0 if not commands generic commands for all types.
However, I ask that you always attribute the book to me, .... It helps us understand
why values can be anything - Redis never needs to read or understand them.
Atomicity. ⢠Redis is single-threaded. ⢠This makes concurrency very, very simple, and because it's so fast, it's no
I mean, it's an in-memory key-value store, right? ..... MongoDB and friends .... Very memory efficient: You can have a l
About This Book. License. The Little Redis Book is licensed under the Attribution-NonCommercial 3.0 Unported license. Yo
Zhrnutie často používaných operácií na pokladnici Euro500 T/TX/TE Handy Poznámka: Tam, kde je medzi symbolmi kláves znak "+", je potrebné stlačiť ...
Nov 15, 2013 ... Provides backwards compatibility with older versions of redis-py that changed
arguments to some commands to be more Pythonic, sane, or by ...
Mar 29, 2012 ... Redis - a C-based fast in-memory, disk-backed key/ value database. Edis - an
Erlang-based, leveldb-backed key/value store that speaks the ...
doRedis and EC2. Ready to roll AMI available. Linux magic is in the redis-worker
-installer.sh file distributed with the package (a generic. doRedis service for any ...
Feb 4, 2014 ... django-redis is a BSD Licensed, full featured redis cache backend for Django ...
Redis cache allows you to use either a TCP connection or Unix ...
Inroduction. - 1 -. Statistical analysis of flow data using Python and Redis.
FLOCON 2013. Kevin Noble. [email protected]. DRAFT ...
If a system has multiple web sites and web stores with large catalogs, ... of crawling, we noted that the core_cache_table contained more than 10 million records, ...
May 10, 2013 ... 0 Identify and resolve issues with Redis-based apps before end users are ....
Score Well in IBPS Exams 2013 Get Details About the Book.
Every line, including the last one, must have the usual end-of-line mark. 5. After the output of all test cases, no extr
Magento Enterprise Edition 1.13 with Redis and the PHP Redis Extension.
Potential Issues with Redis as a Cache Backend. IMPLEMENTING AND
TESTING ...
The first line of a test case contains a single integer N indicating the ... Both penguins can move freely through the f
Redis. AK-47. WEAPON DESIGN. Designed at the end of WWII by Mikhail ..... http
://books.google.com/books?id=SYM1lrQdrdsC&lpg=PP1&pg=PA94.
Performance Metrics. Using critical Redis metrics to troubleshoot performance
issues ... Redis: the speed of a cache with the persistence of a traditional DB .
shortly compared and then the key concepts of Redis KVS are explained. A
Redis specific implementation of object persistence is illustrated with
pseudocode ...
What is redis? ○ an in-memory key-value store, with persistence. ○ open source
. ○ written in C. ○ “can handle up to 232 keys, and was tested in practice to ...
Redis Presentation by Atreyee Maiti
What is redis? ● ● ● ●
an in-memory key-value store, with persistence open source written in C “can handle up to 232 keys, and was tested in practice to handle at least 250 million of keys per instance.” - http://redis.io/topics/faq ● most popular key-value store - http://db-engines.com/en/ranking
History: ● REmote DIctionary Server ● released in March 2009 ● built in order to scale http://lloogg.com/
Features ● abstract data types - Lists, Sets, Sorted sets of strings (collections of non-repeating elements ordered by a floating-point number called score), Hashes ● two kinds of persistence mechanisms ● replication ● publish subscribe ● transactions (with optimistic locking) ● Lua scripting ● command line tool
Redis protocol
Persistence mechanism RDB(Redis snapshotting) and AOF(Append-only file) ● The RDB persistence performs point-in-time snapshots of dataset at specified intervals. ● The AOF persistence logs every write operation received by the server, that will be played again at server startup, reconstructing the original dataset. Commands are logged using the same format as the Redis protocol itself, in an append-only fashion.
Replication ● redis master - handles all reads/ writes ● slave - hot standby - can also be configured for scalability to serve reads ● sentinels - mechanism for monitoring, failover - uses pub/sub, gossip and agreement protocols
Transactions
To redis or not? ● ● ● ● ●
Counting Downloads High Score tables Caching Queues coupling with other databases
My two cents :) ● using resque for managing background jobs ● jobs placed on queues ● used sentinels for HA
So who is using redis?
Source: http://redis.io/topics/whos-using-redis
USP ● ● ● ● ●
in-memory with persistence supported data types pub/sub queues support for a whole lot of clients
Source: http://redis4you.com/articles.php?id=003
Comparison Redis
Mongodb
Couchdb
Stock prices. Analytics. Real-time data collection. Real-time communication. And wherever you used memcached before.
For most things that you would do with MySQL or PostgreSQL, but having predefined columns really holds you back.
CRM, CMS systems. For accumulating, occasionally changing data, on which predefined queries are to be run. Places where versioning is important.
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