White Papers
Table Of Contents
- Executive Summary (updated May 2011)
- 1. Introduction
- 2. Dell NFS Storage Solution Technical Overview
- 3. NFS Storage Solution with High Availability
- 4. Evaluation
- 5. Performance Benchmark Results (updated May 2011)
- 6. Comparison of the NSS Solution Offerings
- 7. Conclusion
- 8. References
- Appendix A: NSS-HA Recipe (updated May 2011)
- A.1. Pre-install preparation
- A.2. Server side hardware set-up
- A.3. Initial software configuration on each PowerEdge R710
- A.4. Performance tuning on the server
- A.5. Storage hardware set-up
- A.6. Storage Configuration
- A.7. NSS HA Cluster setup
- A.8. Quick test of HA set-up
- A.9. Useful commands and references
- A.10. Performance tuning on clients (updated May 2011)
- A.11. Example scripts and configuration files
- Appendix B: Medium to Large Configuration Upgrade
- Appendix C: Benchmarks and Test Tools
Dell HPC NFS Storage Solution - High Availability Configurations
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k) NFS export options
Make this change in one place in the xml. “sync” is a required option for NSS-HA.
<nfsclient allow_recover="1" name="NFS_client"
options="fsid=55,rw,sync,no_root_squash" target="*"/>
l) For InfiniBand clusters, location of the ibstat_script file. This location must be the
same on both the servers.
Make this change in one place in the xml.
<script file="/root/ibstat_script.sh" name="ibstat_script"/>
m) The location of the sas_path_check_script file. This location must be the same on
both the servers.
Make this change in one place in the xml.
<script file="/root/sas_path_check_script.sh" name="
sas_path_check_script "/>
Increment the config_version by one. This is on line 2 of /etc/cluster/cluster.conf.
This next command will synchronize the cluster configuration file between the active and
the passive server. It will also start the cluster service that includes activating the HA
LVM, mounting the XFS file system, exporting it via NFS and creating the floating
resource IP.
On the active server, run the command
# ccs_tool update /etc/cluster/cluster.conf
14) Check that the cluster service is running.
Cluster status should show both servers online. If the cluster is up and running, go on to the
next step.
[root@active ~]# clustat
Cluster Status for NSS_HA_CLUSTER @ Thu Mar 3 10:41:48 2011
Member Status: Quorate
Member Name ID Status
------ ---- ---- ------
active 1 Online, rgmanager
passive 2 Online, Local,
rgmanager
Service Name Owner (Last) State
------- ---- ----- ------ -----
service:HA_service active started
On the server that is running the service, check that the XFS file system is mounted.
[root@active ~]# mount | grep xfs
/dev/mapper/DATA_VG-DATA_VG_LV on /mnt/xfs_data type xfs
(rw,noatime,allocsize=1g,nobarrier,inode64,logbsize=262144,wsync)