Hi all,
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 ESXi virtual machines. I've created two node in two ESXis with two replicas, this node has 16GB of RAM and 8 CPU at 2 GHz; this nodes are the shared storage with the glusterFS. Then I've added it as a NFS mount point in another ESXi.Finally I've created a ubuntu virtual machine with vSphere using the glusterFS as a datastore.
For the gluster volume I've used an SSD disk (Kingston HyperX SSD 3K 120GB with reads at 555MB/s, writes at 510MB/s); I've configured the gluster volume with the default options.
All the scenario works well, the problem is that the VM performance is very poor.
For the test I've used the fio and the dd tools.
The maximum IOPS I've achieved using fio for random-write is 2000 and a 70MB/s of transfer rate. For compare the results I've installed a VM directly into the SSD (without GlusterFS interaction) and the results are 29K IOPS and 120MB/s.
Any of you are tested GlusterFS for the ESXi storage? Maybe there are any configuration in the ESXi advanced options that I need to modify?
Best regards,
David