[Gluster-users] GlusterFS performance

David Seira davidseira at gmail.com
Mon Sep 30 07:59:50 UTC 2013

I've also tested with XFS but with the same results.

Which are the best performance options to store big files?

Best regards,

2013/9/27 David Seira <davidseira at gmail.com>

> Hi list,
> I'm trying to deploy a GlusterFS cluster to use as a base filesystem
> storage for VMWare ESXi. I want to test the glusterFS performance to store
> the virtual machines.
> I've created two VMs with only two replicas, both VM have 16GB of RAM and
> 8 CPU at 2 GHz. I've configured the glusterFS volume with the default
> parameters. The replication works perfectly; every file is replicated
> automatically. For the gluster volume I've used an SSD disk (Kingston
> HyperX SSD 3K 120GB with reads at 555MB/s, writes at 510MB/s).
> To test the glusterFS performance, I've configured the GlusterFS cluster
> as a storage in another ESXi through NFS. Then I've created a ubuntu
> virtual machine in this ESXi.
>  For the test, I've used the fio and dd tool. The maximum IOPS I've
> achieved using fio for random-write is 2000 and a 70MB/s of transfer rate.
> To compare the results I've installed a VM directly into the SSD (without
> GlusterFS interaction) and the results are 29K IOPS and 120MB/s. In
> sequencial access the result are similar.
> I don't know why the performance is so reduced.
> Are there any special option to configure the replicate mode to increase
> this behaviour (big files with a lot of writes)?
> I've also tested the volume with this options:
> nfs.trusted-write: On
> performance.write-behind-window-size: 1GB
> performance.io-thread-count: 64
> performance.cache-size: 1GB
> performance.flush-behind: on
> performance.write-behind: on
> performance.low-prio-threads: 64
> performance.least-prio-threads: 64
> performance.high-prio-threads: 64
> performance.normal-prio-threads: 64
> performance.nfs.write-behind: on
> But with similar results.
> Any of you have tested GlusterFS as a storage for the ESXi?
> Best regards,
> David
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