Netgear RD5D (ReadyDATA Disk Packs) – ReadyDATA Disk Packs (SATA/NL-SAS/SAS/SSD) Quick Setup Guide
Optimize Performance on a ReadyDATA System
14
Volume Performance and Configuration on ReadyDATA Platforms
Sequential Read and Write Performance Overhead with Compression
The following figure shows that enabling compression weakens the sequential performance
for read operations. Write operations are affected very minimally. The two bars on the left
show write operations. The two bars on the right show read operations.
for read operations. Write operations are affected very minimally. The two bars on the left
show write operations. The two bars on the right show read operations.
Figure 12. Sequential read and write performance overhead with compression
Comparison of Disk Type and RAID Level
Combinations
Combinations
The graphs in this section illustrate how the selection of HDDs affects the RAID performance
on a SAN volume and a NAS volume.
on a SAN volume and a NAS volume.
Hard Disk Drives and RAID Performance on a SAN Volume
While pure SSD volumes always outperform volumes with spinning disks such as SAS or
SATA disks, pure SSD volumes are usually not practical because of high cost and capacity
limitations. Taking cost and capacity into consideration, SAS drives in a RAID 10
configuration provide the best all-around performance for SAN volumes. NETGEAR strongly
recommends using SAS drives in a RAID 10 configuration for virtualization, iSCSI
applications, and any other storage application that requires high IOPS, low latency, or both.
SATA disks, pure SSD volumes are usually not practical because of high cost and capacity
limitations. Taking cost and capacity into consideration, SAS drives in a RAID 10
configuration provide the best all-around performance for SAN volumes. NETGEAR strongly
recommends using SAS drives in a RAID 10 configuration for virtualization, iSCSI
applications, and any other storage application that requires high IOPS, low latency, or both.
For more information about the RAID performance on a SAN volume with SATA disks and a
SAN volume with SAS disks, see
SAN volume with SAS disks, see
18.
The graphs in the following sections are based on a volume with 12 disks and a transfer of
200
200
GB data over iSCSI.