[Gluster-users] The mysterious NUFA - help needed

Hafeez Bana hafeez.bana at gmail.com
Tue Oct 15 09:07:54 UTC 2013

Hi All,

I've been playing with Gluster 3.4x - in particular the nufa configuration.
All the setups are via the gluster CLI.

A simple nufa config across 2 machines with the subvolumes being bricks
works without issue.

However anything more complex gives very strange behaviors. For instance
the below config.

This volume is meant to have a replica set on each machine and then tied
together into a nufa config.

I then mount nufa4 on BBBHOST and AAAHOST and simulate some writes. This
works and the speeds seem to indicate the writes are happening locally.

However the strange thing is if you look into any of the brick dirs i.e.
/DIR_ON_HOST/test004a/ - no files are present!

The volume continues to operate but I am baffled about
1) Where the files are being stored
2) Whether such a configuration is possible i.e  a nufa sitting on top of 2
replica systems (and in fact how nufa figures out which replica sit is on
the local host).

Any insight would be helpful.


Volume Name: nufa-r4
Type: Replicate
Volume ID: d47ceecf-11be-49a3-8b27-9d1df61f588c
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Brick1: AAAHOST:/DIR_ON_HOST_A/test004a
Brick2: AAAHOST:/DIR_ON_HOST_A/test004b

Volume Name: nufa-r4b
Type: Replicate
Volume ID: 98bc1402-fbd9-4637-81c2-2f24029d51bc
Status: Started
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Brick1: BBBHOST:/DIR_ON_HOST_B/test004a
Brick2: BBBHOST:/DIR_ON_HOST_B/test004b

Volume Name: nufa4
Type: Distribute
Volume ID: 061a3359-ec92-4ab3-9305-bae783df0ec2
Status: Started
Number of Bricks: 2
Transport-type: tcp
Brick1: AAAHOST:/nufa-r4
Brick2: BBBHOST:/nufa-r4b
Options Reconfigured:
cluster.nufa: on
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