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Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities

New server components in this release Table 4.

Server

components

Previous release

(4)

This version

Reason for update

NFS server

PowerEdge R710

Memory per NFS

server

48 GB

96 GB

More memory to

improve performance

where a large cache is

useful. Also to manage

possible XFS repair

operations on the larger

capacity file system.

Operating

System

RHEL 5.5 x86_64

RHEL 6.1 x86_64

Dell has worked with

Red Hat to support

configurations that are

>100TB using XFS with

RHEL 6.1.

Kernel version

2.6.18-194.el5

2.6.32-131.0.15.el6

Update to RHEL 6.1

File system (XFS)

version

2.10.2-7

3.1.1-4

For XFS > 100TB support

10 Gigabit

Ethernet Driver

ixgbe 2.0.44-k2

ixgbe 3.0.12-k2

Driver native to RHEL

InfiniBand driver

Mellanox OFED 1.5.1

Mellanox OFED 1.5.3-

3.0.0

Latest version of

Mellanox OFED at time

of solution release.

SAS cards per

server

1 SAS card for

capacities up to 96TB.

Two SAS cards for

capacities of 192TB.

2 SAS cards.

2 SAS cards improve

server to storage

sequential read

performance by up to

12%.

Evaluation 5.

The architecture proposed in this white paper was evaluated in the Dell HPC lab. This section describes

the test methodology and the test bed used for verification. It also contains details on the functionality

tests.

The performance characterization of the solution is one of the major differences from the previous

version. Hence the performance analysis is presented as a separate section later in this document.

5.1. Method

The NFS Storage Solution described in this solution guide was tested for HA functionality and

performance.

A 144TB NSS-HA configuration was used to test the HA functionality of the solution. Different types of

failures were introduced and the fault tolerance and robustness of the solution was measured. Section

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