I just wanted to point out an article that I found while searching about vSphere and Datastore management and monitoring.
What would be better than being warned that your datastore is reaching a critical point, wouldn’t it be nice to intercept before the VMs crash?! Of course it would. Check out this pdf “Storage with VMware vSphere“, I have included an insert below.
“vSphere enables many new features for the management of virtualization storage resources. These capabilities provide vSphere administrators with new ways to increase efficiency for disk utilization and CPU cycles. With automated proactive alerts and alarms, vCenter provides more visibility and control of storage resource allocations, deployment, and monitoring. Also, new levels of reporting, topology maps, and datastore status and details screens provide an easy way to manage access and limit storage sprawl in VMware deployments. Storage VMotion has been enhanced to enable more choices for migrating VM homes from one type of storage to another. And finally, new choices exist for optimizing I/O traffic for I/O intensive Virtual Machines.”
This next link gives you a quick insight into what vSphere Offers in terms of Data Management overall, including “Responsible Thin Provisioning”.
Of course if you just cant get your hands on vSphere 4, then you can purchase Veeam Monitoring, which can monitor datastores and alert you when the datastores are almost full… see insert and check out the Veeam Monitor Homepage
“Veeam Monitor 4.0 provides full storage monitoring capabilities, including disk space, disk issues and datastore monitoring. The latter allows for viewing datastore load information aggregated from disk utilization statistics of all VMs and hosts using the specific datastore. This allows you to see the actual cumulative load on a particular datastore, and set up an alarm that fires off when the datastore load is above a specified threshold. Datastore I/O monitoring is a unique Veeam Monitor feature not available from other VMware monitoring applications.”