39. KBGEN0007 - Data restores run very slowly.

Summary This article will guide you through what to do when your data restores run very slowly.
Symptom Data restores are running very slowly.
Cause 1 If you are not using a wired university network connection, then your download speed might not be sufficiently fast for the amount of data that you wish to restore.
Resolution 1 This should not be an issue on the wired university network; but, over a wireless or offsite connection, speeds will be limited. For a guide to how quickly you can restore data, use a speed test website to check your connection speed, and compare the results with the table of backup and restore speeds at our page on backup over VPN.
Cause 2 Data is being restored in many small restore sessions, rather than in a small number of large restore sessions.
Resolution 2 If you are repeatedly requesting small quantities of data, then this will ultimately be slower than selecting a large amount of data to restore in a single session. The HFS robot quickly locates, mounts, and finds its place on the appropriate data tape(s); but delays will occur if the tape is then put back in its library slot, only to be brought out again for a further small restore session. Minimise the number of restore sessions by selecting for restore as much as it is practicable for you to select all at once.
More Information
Applies To TSM

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