[Gluster-users] slow write perf for disperse volume

[Pranith Kumar Karampuri]

We were able to saturate hardware with EC as well. Could you check 'top' in
threaded mode to see if fuse thread is saturated when you run dd?

On Mon, Apr 24, 2017 at 3:27 PM, Ingard Mevåg <ingard at jotta.no> wrote:

> Hi
> I've been playing with disperse volumes the past week, and so far i can
> not get more than 12MB/s when i do a write test. I've tried a distributed
> volume on the same bricks and gotten close to gigabit speeds. iperf
> confirms gigabit speeds to all three servers in the storage pool.
>
> The three storage servers have 10gig nics (connected to the same switch).
> The client is for a now a docker container in a 2nd DC (latency roughly 8-9
> ms).
>
> dpkg -l|grep -i gluster
> ii  glusterfs-client               3.10.1-ubuntu1~xenial1          amd64
>      clustered file-system (client package)
> ii  glusterfs-common               3.10.1-ubuntu1~xenial1          amd64
>      GlusterFS common libraries and translator modules
> ii  glusterfs-server               3.10.1-ubuntu1~xenial1          amd64
>      clustered file-system (server package)
>
> $ gluster volume info
>
> Volume Name: DFS-ARCHIVE-001
> Type: Disperse
> Volume ID: 1497bc85-cb47-4123-8f91-a07f55c11dcc
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 1 x (4 + 2) = 6
> Transport-type: tcp
> Bricks:
> Brick1: dna-001:/mnt/data01/brick
> Brick2: dna-001:/mnt/data02/brick
> Brick3: dna-002:/mnt/data01/brick
> Brick4: dna-002:/mnt/data02/brick
> Brick5: dna-003:/mnt/data01/brick
> Brick6: dna-003:/mnt/data02/brick
> Options Reconfigured:
> transport.address-family: inet
> nfs.disable: on
>
> Anyone know the reason for the slow speeds on disperse vs distribute?
>
> kind regards
> ingard
>
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-- 
Pranith
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