White Papers

16 Dell HPC NFS Storage Solution – High Availability (NSS7.0-HA) Configuration
During the failover period, when the data share is temporarily unavailable, the client processes were in an
uninterruptible sleep state.
Depending on the characteristics of the client processes, the processes can be expected to either stop
abruptly or sleep while the NFS share is temporarily unavailable during the failover process. Any data that
has already been written to the file system will be available after the failover is completed.
For read and write operations during the failover case, data correctness was successfully verified by using
the checkstream utility.
The information about IOzone, checkstream, and dd is available in Appendix A of this technical white
paper.