[Gluster-users] Distributed-Replicated with mismatch number of bricks

[Jose V. Carrión]

Hi,

I would like to implement a distributed-replicated architecture but some
of my nodes have different number of bricks. My idea is to do a replica 2
through 6 nodes (all bricks with the same size).

My gluster architecture is:

Name node | Brick 1 | Brick 2

------------------------------------------

Node1 | R1 | |

Node2 | R1 | |

Node3 | R2 | R3 |

Node4 | R2 | R3 |

Node5 | R4 | R5 |

Node6 | R4 | R5 |

My questions are:

1. Would be this correct ?

gluster volume create vol0 replica 2 transport tcp \
node1:/data/gluster/vol0/brick1 node2:/data/gluster/vol0/brick1 \
node3:/data/gluster/vol0/brick1 node4:/data/gluster/vol0/brick1 \
node3:/data/gluster/vol0/brick2 node4:/data/gluster/vol0/brick2 \
node5:/data/gluster/vol0/brick1 node6:/data/gluster/vol0/brick1 \
node5:/data/gluster/vol0/brick2 node6:/data/gluster/vol0/brick2 \

2 If I need to add a new node in the future, I will be able to extend my
distributed replication system ? Something like:

Name node | Brick 1 | Brick 2

------------------------------------------

Node1 | R1 | |

Node2 | R2 | |

Node3 | R3 | R4 |

Node4 | R3 | R4 |

Node5 | R5 | R6 |

Node6 | R5 | R6 |

Node7 | R1 | R2 |


gluster volume create vol0 replica 2 transport tcp \
node1:/data/gluster/vol0/brick1 node7:/data/gluster/vol0/brick1 \
node2:/data/gluster/vol0/brick1 node7:/data/gluster/vol0/brick2 \
node3:/data/gluster/vol0/brick1 node4:/data/gluster/vol0/brick1 \
node3:/data/gluster/vol0/brick2 node4:/data/gluster/vol0/brick2 \
node5:/data/gluster/vol0/brick1 node6:/data/gluster/vol0/brick1 \
node5:/data/gluster/vol0/brick2 node6:/data/gluster/vol0/brick2 \

3. My nodes will also mount volumes (gluster clients) so in order to
optimize the read performance operations, what is the best replication
system: distributed-replicated or only replicated.


Thanks in advance.

[Amar Tumballi]

Post by Jose V. Carrión
Hi,
I would like to implement a distributed-replicated architecture but some
of my nodes have different number of bricks. My idea is to do a replica 2
through 6 nodes (all bricks with the same size).
Name node | Brick 1 | Brick 2
------------------------------------------
Node1 | R1 | |
Node2 | R1 | |
Node3 | R2 | R3 |
Node4 | R2 | R3 |
Node5 | R4 | R5 |
Node6 | R4 | R5 |
1. Would be this correct ?
gluster volume create vol0 replica 2 transport tcp \
node1:/data/gluster/vol0/brick1 node2:/data/gluster/vol0/brick1 \
node3:/data/gluster/vol0/brick1 node4:/data/gluster/vol0/brick1 \
node3:/data/gluster/vol0/brick2 node4:/data/gluster/vol0/brick2 \
node5:/data/gluster/vol0/brick1 node6:/data/gluster/vol0/brick1 \
node5:/data/gluster/vol0/brick2 node6:/data/gluster/vol0/brick2 \
Looks correct.

2 If I need to add a new node in the future, I will be able to extend my

Post by Jose V. Carrión
Name node | Brick 1 | Brick 2
------------------------------------------
Node1 | R1 | |
Node2 | R2 | |
Node3 | R3 | R4 |
Node4 | R3 | R4 |
Node5 | R5 | R6 |
Node6 | R5 | R6 |
Node7 | R1 | R2 |
gluster volume create vol0 replica 2 transport tcp \
node1:/data/gluster/vol0/brick1 node7:/data/gluster/vol0/brick1 \
node2:/data/gluster/vol0/brick1 node7:/data/gluster/vol0/brick2 \
node3:/data/gluster/vol0/brick1 node4:/data/gluster/vol0/brick1 \
node3:/data/gluster/vol0/brick2 node4:/data/gluster/vol0/brick2 \
node5:/data/gluster/vol0/brick1 node6:/data/gluster/vol0/brick1 \
node5:/data/gluster/vol0/brick2 node6:/data/gluster/vol0/brick2 \

This should be add-brick to existing volume, and not another create volume

Post by Jose V. Carrión
3. My nodes will also mount volumes (gluster clients) so in order to
optimize the read performance operations, what is the best replication
system: distributed-replicated or only replicated.

In this case, if you have just 3 machines, for read perf, replica is
better. If you have more nodes then to utilise all the storage you need
distributed replicate.

Post by Jose V. Carrión
Thanks in advance.
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