Dell FS7500 Manuel technique - Page 11

Parcourez en ligne ou téléchargez le pdf Manuel technique pour {nom_de_la_catégorie} Dell FS7500. Dell FS7500 22 pages. Equallogic best practices series network attached storage
Également pour Dell FS7500 : Manuel (18 pages), Vue d'ensemble (7 pages), Configuration du matériel (2 pages)

Imprimer la page

4 Test methodology

We selected Vdbench for its ability to be controlled by a script and parameter file. For the block I/O

testing, we configured Vdbench to read and write from RAW disks without a file system. For our block

clients we used a working file size of 8GB to minimize the effect of client-side caching in the VM.

For the file I/O tests, we initially ran tests against both CIFS and NFS mount points. The results were

very similar, so for the combined block and file testing, we used only NFS mount points for the file

clients. We configured Vdbench to create a directory structure that was three directories wide and two

directories deep. Each bottom-level directory had sixteen 50MB files which resulted in a total working

set of about 5GB for each client.

We used a workload of 8K random I/Os with a read percentage of 70% (30% writes). We chose 8K

because it is fairly common for both block I/O enterprise applications and also representative of NAS

clients working on office-like documents in end-user collaboration environments. For each client VM,

we ran 8 Vdbench worker threads. This resulted in a client that generated more I/O than a typical user,

however it minimized the number of overall client systems we required to generate a significant

workload on the SAN. We ran each workload for 10 minutes, and then collected the results from each

Vdbench client and from a separate management system that was running SAN HQ.

We initially started with only block clients, scaling up our test from 1-16 clients. Then we repeated the

tests with CIFS and NFS clients to ensure that each set of clients would also show a similar scale-up

behavior. Next, we configured our file clients for NFS access and started scaling up combined file and

block tests from 2 clients (first one block, one file; then two of each block and file, and so on) to a total

of 32 clients.

For all of our tests we monitored the response time as measured by Vdbench. We established a criteria

to keep client response time to under 20ms, and in all of our tests never exceeded this.

BP1016

Integrating the Dell EqualLogic FS7500 into an Existing SAN