We recently had an opportunity to test IBM Tivoli Storage Manager (TSM) release 6.3 replication in our HyperIP lab. IBM just released this feature as part of their TSM 6.3 release in November. As stated in our previous Blog entry about TSM Backup testing, http://www.netex.com/blog/?p=175, it is important to first determine the overall limits of the native application before WAN acceleration.
Our test configuration included two HyperIP WAN Optimization virtual appliances, two windows servers running TSM 6.3, and a distance simulator for the WAN. The WAN simulator has the ability to inject packet loss, network latency, and other network conditions over various bandwidths that can degrade replication performance.
Like many other applications, replication is designed for the datacenter – to – datacenter movement of corporate data. Most replication applications perform very well when moving data over short distances, or in a metro environment. Customers running TSM Replication, in many cases, will need the remote site to be extended over the WAN, to an internal DR site, DR Service Provider, or Cloud Storage Provider. Any time distance is needed, network conditions such as latency and packet loss can significantly degrade application performance and become a huge impact on the throughput and application efficiency.
In our lab when latency and packet loss is experienced TSM native replication performance slowed by over 80% due to the typical inefficiencies of the TCP transport and not necessarily the fault of the TSM application. When HyperIP was added to the configuration, TSM Replication was able to achieve throughput equivalent to native performance and no delay. In fact HyperIP was able to help TSM Replication achieve near native line speeds at distances represented by 40 ms RTT, 80 ms RTT, 320 ms RTT all the way up to a 1 second RTT. TSM Replication over HyperIP proved to perform quite well at any distance, even with a significant amount of packet loss. In some cases HyperIP will accelerate TSM Replication by 6X. If 2:1 compression is possible then the TSM acceleration with HyperIP may approach 12X. Check it out for yourself. Download HyperIP by clicking on the big orange box above.
Want more information about TSM performance with HyperIP? Send an email to firstname.lastname@example.org.
Links to our Product information and Best Practices are found here:
HyperIP product info: http://www.netex.com/hyperip
TSM Best Practices with HyperIP: http://www.netex.com/index.php/download_file/view/301
Become a HyperIP reseller: http://www.netex.com/partners/register
IBM PartnerWorld Link: HyperIP Virtual WAN Optimization
IBM Tivoli Storage Blog Link: NetEx HyperIP Accelerates TSM Replication