IBM E16RMLL-I Implementation Guide - Page 537
Resourceutilization
![]() |
View all IBM E16RMLL-I manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 537 highlights
If you increase this parameter, consider that: More data per transaction will increase server recovery log requirements. Check log and log pool space to ensure that there is enough space, and remember that a larger log may increase server startup time. More data per transaction may result in more data being retransmitted if a retry occurs. During a retry, all objects belonging to the current transaction need to be retransmitted, which can decrease performance. Tip: Check your client log files for retransmission attempts during backups. They can occur, for example, when a file grows because client compression is enabled and the compressalways option is set to no. The benefits of changing this parameter are subject to configuration and workload characteristics. In particular, this parameter benefits tape storage pool backup more than disk storage pool backup, especially if the workload consists of many small files. When setting the size of transactions, consider setting a smaller size if you are experiencing many resends due to files changing during backup when using static, shared static, or shared dynamic. This applies to both static and shared, because when a client detects that a file has changed during backup and decides not to send that file, it still has to re-send the other files in the transaction. RESOURCEUTILIZATION The RESOURCEUTILIZATION client option regulates the level of resources (that is, number of concurrent sessions) the Tivoli Storage Manager client and server can use during processing. Tivoli Storage Manager clients are automatically multi-session capable and this function is transparent to the end user. However, the RESOURCEUTILIZATION parameter allows the user to customize the function. This option increases or decreases the ability of the Tivoli Storage Manager client to create multiple sessions. The value of RESOURCEUTILIZATION does not represent the amount of sessions created by the client - it specifies the level of resources the Tivoli Storage Manager server and client can use during backup or archive processing. During backup or archive, the higher the value, the more sessions the client can start if it deems necessary. The parameter can range from 1 to 10. When the option is not set, which is the default, only two sessions are created to the server. One session is opened for querying the server and the other for transferring file data. Chapter 15. Performance considerations 507
![](/manual_guide/products/ibm-e16rmlli-implementation-guide-3588123/537.png)