Tagged Questions

0
votes
2answers
18 views

Redis Connection Exception when used as a Session manager for Tomcat 7

I have a redis running on a remote server and another web app is able to connect to it withou any issues. I am using redis as a session storage and when I try to connect multiple tomcat instance it ...
0
votes
2answers
53 views

MapReduce read input from Redis

I want to write a Java Program which does the MapReduce Job(e.g. word count). The input is from the Redis. How can I write the Map Class to retrieve one by one from the Redis and do some process in ...
0
votes
2answers
40 views

how to store an image to redis using java / spring

I'm using redis and spring framework on my image upload server. I need to store the images to redis. I have found the following question but it was for python. how to store a image into redis using ...
0
votes
0answers
16 views

Cleanly shutting down JEDIS BRPOP

I may be running into a limitation with the JEDIS implementation, but here goes. I have a service that has a runnable for BRPOP. When new items are added to the queue they are taken off and executed ...
1
vote
1answer
93 views

Persistent Scheduled Jobs in Java/Scala with Redis

Akka Scheduler is great but lacks persistence. Is there any good solution for job scheduling with persistence? Preferably Redis.
0
votes
3answers
62 views

How to store ArrayList in Redis caching?

I am trying to store Arraylist values which coming from DB to Redis Client . But Redis have only Key/Value methods the Key/Value must be String format. How can i store Key as String and Values As ...
2
votes
1answer
81 views

Jedis - When to use returnBrokenResource()

When exactly we should use this method. On JedisConnectionException, JedisDataException or for any JedisException. There is no good API documentation for Jedis to my knowledge. try { Jedis jedis ...
0
votes
2answers
153 views

Caching large data sets with hibernate/jpa/memcache?

I'm new to open source stacks and have been playing with hibernate/jpa/jdbc and memcache. I have a large data set per jdbc query and possibly will have a number these large data sets where I ...
1
vote
0answers
61 views

How to read erlang term from redis by using java client?

e.g. I save the tuple T = {k1, v1, k2, v2} to the redis by jedis: eredis:q(Conn, ["SET", <<"mykey">>, term_to_binary(T)]). I am trying to use the code below to read this erlang term: ...
2
votes
2answers
206 views

Port forwarding with nginx from java

I'm trying to make a java application which uses redis as a backend. Since Redis is a really fast key-value store which I'd like to use, but redis is made to be used with 1 client so it doesn't have ...
0
votes
0answers
49 views

I want to know how to traverse all keys with ShardedJedis in Jedis?

I am writing a message pull center on the sever side with redis, MsgEntity is javabean to represent a message: package com.pipeline; public class MsgEntity { private String msgId; private String ...
1
vote
1answer
66 views

What's the difference between getBytes and serialize with String?

Just as the title says, I can't differ getBytes[] from serialization mechanism with String. Below is a test between getBytes[] and serialization mechanism: public void testUTF() { byte[] ...
0
votes
1answer
96 views

Which one performance better when I use jedis , set(byte[], byte[]) or set(String, String)?

On my laptop, set String directly is always proformace better than set byte[], even with Serialization mechanism when I test with Jedis. I am confused that if String should be serialized when call ...
1
vote
1answer
36 views

Can I put a whole list value once instead of “RightPush” a item many times in redis?

I want to put a whole list to redis, but I find that there is only RightPush method can be used. for which I need to loop through all items in my list and RightPush each item for many times. I think ...
3
votes
1answer
145 views

why it is so slow with 100,000 records when using pipeline in redis?

It is said that pipeline is a better way when many set/get is required in redis, so this is my test code: public class TestPipeline { /** * @param args */ public static void ...

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