Release Notes

28 Dell PS Series Snapshots and Clones: Best Practices and Sizing Guidelines | BP1027
IOmeter workload types
Workload
type
# workers
I/O type
Read/Write
Mix
Block Size
Volume
Volume
Access
Backup
1
Sequential
100/0
128K
Snapshot
100%
Application
8
Random
67/33
8K
Base
10%
The read/write mix indicates the ratio of read to write on the source volume when referring to the application
workload, and on the snapshot volume when referring to the backup workload. Volume access is the amount
of the base volume or snapshot volume the workload was allowed to access.
As shown in Figure 12, when increasing the number of volumes, and therefore the workload against both sets
of volumes, the latency of the base (source) volume increased as expected. The workload was actively
modifying portions of the base volume after the snapshot was created and therefore consuming snapshot
reserve. However, because snapshots share data with the base volume, portions of the data were being
accessed by both workloads.
Simulated multi-host backup (IOPS)