Transcript
Occasionally, you may encounter a scenario where environmental factors are creating a bottleneck, causing data protection operations to perform sub-optimally. Commvault has made it easy to identify these bottlenecks, test performance and identify steps that can be taken to optimise your environment. From the command centre, you can view the job details of any running job or any previously run job from the job history. The job details pane will give the details of the average throughput performance of the job. It will break down the throughput into read, write, DDB and network categories. This breakdown is useful for locating where the potential bottleneck may be, allowing you to investigate further. If the job details view is showing a slow throughput, with a high percentage for the read category, it is likely that the bottleneck is on the client's disk infrastructure. If the percentage is high for the write category, it is likely that the bottleneck is within the media agent or library disk infrastructure. Commvault provides a tool on any device where Commvault software is installed that allows you to check disk performance. If you are investigating poor read performance, you should run this tool on your client. If you are investigating poor write performance, you should run the tool on your media agent. cvdiskperf.exe should be launched from the command line. It is located in the base folder of the Commvault installation directory. A number of flags can be used with the cvdiskperf application to customise the test to your requirements. The required flag, path, specifies the location you wish to check. This can be a local path or a network share. With this flag specified alone, you can run the test with all the default options. The default values are optimised for Commvault processes and will provide the most relevant tests. There are a number of additional options, however, that can be used to customise the tests if required. You can use the minus sequential flag to perform sequential read and write operations. The default is to use random. You can use the minus out file flag to specify a text file to output the test results. You can adjust the block size with the minus block size flag. The default is 64KB. You can adjust the block count with the minus block count flag. The default is 16384. You can adjust the file count with the minus file count flag and thread count with the minus thread count flag. The default for these is 6. You can use minus username, minus password and minus domain flags to perform user impersonation when accessing the file path for tests. If these are not specified, the application user credentials are used. With the values entered, allow the test to run. Once complete, you are presented with detailed test results showing the amount of data processed, the time taken for each test and a calculated performance in GB per hour for each test. With CV Disk Perf in your toolbox, you can help ensure your environment is running optimally.
