FAQ
Hi All,

Can anyone tell me how to configure redis cluster? I installed redis
2.6 version. I want to use two writable master servers and replicate
them each other.

Best regards.

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  • Sergei Tulentsev at May 3, 2012 at 3:20 am
    There's no cluster in 2.6 yet (or did I miss something)?
    On Wed, May 2, 2012 at 4:36 PM, black wrote:

    Hi All,

    Can anyone tell me how to configure redis cluster? I installed redis
    2.6 version. I want to use two writable master servers and replicate
    them each other.

    Best regards.

    --
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    --
    Best regards,
    Sergei Tulentsev

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  • Kaan Çalışkan at May 3, 2012 at 6:36 am
    I see. Maybe you can tell me how to configure multiple site replication
    with redis 2.4 current stable release. I have two hash slots on different
    sites and i have one master server on both sites. They are working fine
    separately but i want to replicate two master servers each other. Is there
    any solution to make this?

    Best regards.

    2012/5/3 Sergei Tulentsev <sergei.tulentsev@gmail.com>
    There's no cluster in 2.6 yet (or did I miss something)?

    On Wed, May 2, 2012 at 4:36 PM, black wrote:

    Hi All,

    Can anyone tell me how to configure redis cluster? I installed redis
    2.6 version. I want to use two writable master servers and replicate
    them each other.

    Best regards.

    --
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    --
    Best regards,
    Sergei Tulentsev

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  • Josiah Carlson at May 3, 2012 at 7:08 am

    On Wed, May 2, 2012 at 11:36 PM, Kaan Çalışkan wrote:
    I see. Maybe you can tell me how to configure multiple site replication with
    redis 2.4 current stable release. I have two hash slots on different sites
    and i have one master server on both sites. They are working fine
    separately but i want to replicate two master servers each other. Is there
    any solution to make this?
    Short answer: no.

    Longer answer: multi-master replication without Redis cluster doesn't
    work. Redis cluster is in unstable right now, but isn't targeted to be
    finished until the end of the year (if I remember correctly).

    Reddit-meme answer (made just for you): http://www.quickmeme.com/meme/3p3m3e/ ;)

    Regards,
    - Josiah
    2012/5/3 Sergei Tulentsev <sergei.tulentsev@gmail.com>
    There's no cluster in 2.6 yet (or did I miss something)?

    On Wed, May 2, 2012 at 4:36 PM, black wrote:

    Hi All,

    Can anyone tell me how to configure redis cluster? I installed redis
    2.6 version. I want to use two writable master servers and replicate
    them each other.

    Best regards.

    --
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    "Redis DB" group.
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    --
    Best regards,
    Sergei Tulentsev

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  • Kaan Çalışkan at May 3, 2012 at 8:28 am
    Your answer is really clear for me :) Thanks. But it is deficiency for
    redis. Maybe redis developers will give us official comment to understand
    it deeply. Many of web sites mention redis new migrate methods for
    clustering system, but redis isn't ready yet.

    2012/5/3 Josiah Carlson <josiah.carlson@gmail.com>
    On Wed, May 2, 2012 at 11:36 PM, Kaan Çalışkan wrote:
    I see. Maybe you can tell me how to configure multiple site replication with
    redis 2.4 current stable release. I have two hash slots on different sites
    and i have one master server on both sites. They are working fine
    separately but i want to replicate two master servers each other. Is there
    any solution to make this?
    Short answer: no.

    Longer answer: multi-master replication without Redis cluster doesn't
    work. Redis cluster is in unstable right now, but isn't targeted to be
    finished until the end of the year (if I remember correctly).

    Reddit-meme answer (made just for you):
    http://www.quickmeme.com/meme/3p3m3e/ ;)

    Regards,
    - Josiah
    2012/5/3 Sergei Tulentsev <sergei.tulentsev@gmail.com>
    There's no cluster in 2.6 yet (or did I miss something)?

    On Wed, May 2, 2012 at 4:36 PM, black wrote:

    Hi All,

    Can anyone tell me how to configure redis cluster? I installed redis
    2.6 version. I want to use two writable master servers and replicate
    them each other.

    Best regards.

    --
    You received this message because you are subscribed to the Google
    Groups
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    --
    Best regards,
    Sergei Tulentsev

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  • Didier Spezia at May 3, 2012 at 9:55 am
    Your answer is really clear for me :) Thanks. But it is deficiency for
    redis. Maybe redis developers will give us official comment to understand
    it deeply.
    Many of web sites mention redis new migrate methods for clustering
    system, but redis isn't ready yet.

    I think you have a wrong idea about what the Redis Cluster will be.
    It will not support master-master replication.

    The migrate command is about resharding (rebalancing) the cluster,
    not master-master replication.

    You can find more information about the Redis Cluster here:
    http://redis.io/presentation/Redis_Cluster.pdf

    It is clearly stated that "there is no merge, nor application-side
    inconsistency resolution"

    While some related commands have been added in Redis 2.6,
    that's a fact Redis Cluster has not been delivered yet.

    If you really need master-master replication capabilities, I suggest you
    turn
    to another storage solution. Very few NoSQL engines provide this
    capability though (CouchDB does, to some extent).

    Some relational storage engines provide it as well.
    Percona clustering solution (based on Galera) comes to my mind:
    http://www.percona.com/software/percona-xtradb-cluster/

    Regards,
    Didier.


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  • Kaan Çalışkan at May 3, 2012 at 11:00 am
    Thanks for your answer Didier. I will consider your suggestions.

    Best regards.

    2012/5/3 Didier Spezia <didier.06@gmail.com>
    Your answer is really clear for me :) Thanks. But it is deficiency for
    redis. Maybe redis developers will give us official comment to understand
    it deeply.
    Many of web sites mention redis new migrate methods for clustering
    system, but redis isn't ready yet.

    I think you have a wrong idea about what the Redis Cluster will be.
    It will not support master-master replication.

    The migrate command is about resharding (rebalancing) the cluster,
    not master-master replication.

    You can find more information about the Redis Cluster here:
    http://redis.io/presentation/Redis_Cluster.pdf

    It is clearly stated that "there is no merge, nor application-side
    inconsistency resolution"

    While some related commands have been added in Redis 2.6,
    that's a fact Redis Cluster has not been delivered yet.

    If you really need master-master replication capabilities, I suggest you
    turn
    to another storage solution. Very few NoSQL engines provide this
    capability though (CouchDB does, to some extent).

    Some relational storage engines provide it as well.
    Percona clustering solution (based on Galera) comes to my mind:
    http://www.percona.com/software/percona-xtradb-cluster/

    Regards,
    Didier.


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  • Kaan Çalışkan at May 3, 2012 at 11:43 am
    I have one more question about redis. Is there any way to redirect ke-value
    pairs to another node when added? I tried to use redis-cli monitor command
    to get set processes but it didn't enogh for me to send them to another
    redis node. I want to send them without master slave relationship.

    Best regards.

    2012/5/3 Kaan Çalışkan <caliskan.kn@gmail.com>
    Thanks for your answer Didier. I will consider your suggestions.

    Best regards.


    2012/5/3 Didier Spezia <didier.06@gmail.com>
    Your answer is really clear for me :) Thanks. But it is deficiency for
    redis. Maybe redis developers will give us official comment to understand
    it deeply.
    Many of web sites mention redis new migrate methods for clustering
    system, but redis isn't ready yet.

    I think you have a wrong idea about what the Redis Cluster will be.
    It will not support master-master replication.

    The migrate command is about resharding (rebalancing) the cluster,
    not master-master replication.

    You can find more information about the Redis Cluster here:
    http://redis.io/presentation/Redis_Cluster.pdf

    It is clearly stated that "there is no merge, nor application-side
    inconsistency resolution"

    While some related commands have been added in Redis 2.6,
    that's a fact Redis Cluster has not been delivered yet.

    If you really need master-master replication capabilities, I suggest you
    turn
    to another storage solution. Very few NoSQL engines provide this
    capability though (CouchDB does, to some extent).

    Some relational storage engines provide it as well.
    Percona clustering solution (based on Galera) comes to my mind:
    http://www.percona.com/software/percona-xtradb-cluster/

    Regards,
    Didier.


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  • Josiah Carlson at May 3, 2012 at 3:36 pm
    As far as I know, there isn't a piece of software that automatically
    syncs values between two instances. Building one may result in some
    very difficult to discover and trace data race issues.

    In this case, I would recommend that you either implement it on the
    client, or look into modifying one of the existing Redis proxy
    solutions.

    Regards,
    - Josiah
    On Thu, May 3, 2012 at 4:43 AM, Kaan Çalışkan wrote:
    I have one more question about redis. Is there any way to redirect ke-value
    pairs to another node when added? I tried to use redis-cli monitor command
    to get set processes but it didn't enogh for me to send them to another
    redis node. I want to send them without master slave relationship.

    Best regards.


    2012/5/3 Kaan Çalışkan <caliskan.kn@gmail.com>
    Thanks for your answer Didier. I will consider your suggestions.

    Best regards.


    2012/5/3 Didier Spezia <didier.06@gmail.com>
    Your answer is really clear for me :) Thanks. But it is deficiency for
    redis. Maybe redis developers will give us official comment to understand it
    deeply.
    Many of web sites mention redis new migrate methods for clustering
    system, but redis isn't ready yet.
    I think you have a wrong idea about what the Redis Cluster will be.
    It will not support master-master replication.

    The migrate command is about resharding (rebalancing) the cluster,
    not master-master replication.

    You can find more information about the Redis Cluster here:
    http://redis.io/presentation/Redis_Cluster.pdf

    It is clearly stated that "there is no merge, nor application-side
    inconsistency resolution"

    While some related commands have been added in Redis 2.6,
    that's a fact Redis Cluster has not been delivered yet.

    If you really need master-master replication capabilities, I suggest you
    turn
    to another storage solution. Very few NoSQL engines provide this
    capability though (CouchDB does, to some extent).

    Some relational storage engines provide it as well.
    Percona clustering solution (based on Galera) comes to my mind:
    http://www.percona.com/software/percona-xtradb-cluster/

    Regards,
    Didier.


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