Measures reported by VnxPoolTest
Disk volumes in the EMC VNX storage system can be organized into groups called storage pools. Storage pools are used to allocate available storage to the file systems managed by EMC VNX. Without sufficient space, file systems cannot service I/O requests from users. This is why, the storage pool assigned to a file system has to be frequently checked for space. The VnxPoolTest test enables this check.
This test monitors the usage of space in every storage pool and proactively alerts administrators if the storage space in any pool is about to be used up completely! This way, the test prompts administrators to right-size their storage pools, so that users have no issues accessing their file systems.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Used_size |
Indicates the space that is currently in use in this storage pool. |
GB |
Ideally, the value of this measure should be low. |
| Available_size |
Indicates the amount of unused space in this storage pool. |
GB |
Ideally, the value of this measure should be high. Compare the value of this measure across storage pools to identify which storage pool is about to run out of space. You may want to add more space to this storage pool by say, adding more disk volumes to the pool. |
| Total_size |
Indicates the total capacity of this storage pool. |
GB |
|
| Potential_size |
Indicates the amount of available space that can be added to this storage pool. |
GB |
EMC VNX allows both file systems and storage pools to automatically grow as needed based on administrator-defined high watermarks. This feature is called auto-extend. The auto-extend feature allows you to define an upper limit to the amount of space that can be allocated to a file system or storage pool. This maximum size represents the potential size of the file system/storage pool. |
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