For our 3 machines that will house user home directories, archive data, and certain LIGO data, we are going to use the 3 vdev config for the zpool, as this gets us the largest usable space, with an acceptable level of performance; this was decided by Patrick, Scott, and Paul.
The table below summarizes the performance testing we did with these systems. We performed a mix of local and remote tests over nfs. The speeds are in MB/s, and are listed as write/read, example 413w/427r means 413MB/s write / 427MB/s read. The complete results are linked to at the bottom of this page.
|Number of vdevs||Size||local bonnie++||local dd||56 Clients, 16 NFSd||56 Clients, 300 NFSd||1 Client bonnie++||1 Client dd|
|3||17TB / 18606163968K||454.5w/526.0r||413w/427r||89.7w/149.3r||103.0w/218.0r||78.6w/113.9r||74.7w/76.6r|
|4||16TB / 17641193472K||447.0w/551.9r||445w/475r||92.4w/161.3r||102.4/255.0r||78.7w/85.2r||74.6w/76.0r|
|5||16TB / 1664321600K||438w||93.7w/187.8r|
|6||15TB / 15713574912K||488w||92.6w/170.5r|