To increase the speed of operations that access the mount path, you can configure the MediaAgent to bypass the Microsoft Windows file system buffering.
Note
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This is applicable for Windows MediaAgents and disks that are mounted directly.
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This feature is Not Supported on UNC paths.
Procedure
To enable unbuffered I/O on a mount path:
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From the CommCell Browser, expand to Storage Resources > Libraries > Library.
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Right-click the appropriate mount path, and then click Properties.
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In the Mount Path Properties dialog box, on the General tab, click Use unbuffered I/O, and then click OK.
To control the number of read ahead buffers in the unbuffered I/O mode:
Note
The read streams for deduplication jobs are not unbuffered. Therefore, this additional setting does not have an effect on deduplicated data and in completion of Auxiliary copy jobs of deduplication data sets.
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From the CommCell Browser, expand to Storage Resources > MediaAgents.
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Right-click the appropriate MediaAgent, and then click Properties.
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In the MediaAgent Properties dialog box, click the Additional Settings tab, and then click Add.
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In the Add Additional Settings on Windows Client dialog box, select the following:
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In the Name box, type dwMaxAsyncIoRequests.
The Category and Type details fill automatically.
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In the Value box, specify the value for number of read ahead buffers.
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Click OK, and click OK to close the MediaAgent Properties dialog box.