HP StorageWorks B-Series Remote Replication Solution Best Practices Guide (5697-6731, June 2007)

5 Too ls for man aging an d
monitoring the repli cation network
Sizing link bandwidth requirements for remote replication is critical in meeting customer’s expectations.
This section includes tools that can be used for estimating the effects of inter-site latency as well as
determining the characteristics of the inter-site link. For additional information about calculating latency
and estima t ing bandwidth requirements, see the HP StorageWorks Continuous Access planning guide
and the HP StorageWorks Continuous Access EVA Performance Estimator user gu ide. Both the planning
guide and estimator user guide can be found via the Technical Documents link on the Continuous Access
EVA homepage at h
ttp://www.hp.com/go/caeva.
HP Storage
Works Continuous Access EVA Performance
Estimator
HP StorageWorks Continuous Access EVA Performance Estimator (the estimator) is an interactive
spreadsheet that calculates the approximate effect of inter-site latency and available bandwidth on
replication throughput for specific link technologies and application write size. You supply the latency
and application writes size, and the estimator determines the average replication I/Os per second
(IOPS) an
dthroughput.
You can use the estimator to evaluate:
• The per formance capabilities of specificinter-sitelinks
• The link r
equirements for specificlevelsofperformance
• The bandwidth and time required for a full copy of the source disks
Download
ing the estimator
1. Browse t
o the HP StorageWorks Continuous Access EVA website h
ttp://www.hp.com/go /caeva.
2. Click Re
lated Information.
The related information links are displayed
3. Click HP StorageWorks Continuous Access EVA Performance Estimator.
4. In the File Download dialog box, click Save and select the destination for the file
5. To use the estimator, open the file in Micr osoft Excel.
The fir
st time you open the Excel file, the default values display. Values in the boxes with white
background can be changed.
B-Series remote replication solution
37