The Live DB can reside on DAS or block (FC or iSCSI) storage.
For Live DB sizing Dell Technologies recommends the following:
- There is no limitation on the maximum retention time for Live DB .
- In an Archive DB implementation, to allow space for video file collection and periodic archiving from the Live DB to the Archive DB, size the available Live DB storage to be at least twice the duration that video is configured to reside on the Live DB. However, the size of the Live DB can be set to a greater value to meet the needs of a particular implementation.
The additional space is to accommodate network maintenance, traffic congestion, and other conditions that may temporarily restrict the bandwidth in an IP network and take time to resolve. For a conservative implementation, you may want to include additional space to allow for break-fix conditions.
The following table shows details of Live DB performance on Unity arrays during lab testing.
Array | Milestone Version | Disks | RAID | No of Recorders | Recorder BW (MB/s) | Array BW (MB/s) | Maximum Capacity (RAW) | |
iSCSI | FC | |||||||
Unity300 | 2018 | 80 | 6 | 7 | 42 | 294 | 323 | 2.34 PB |
150 | 6 | 13 | 42 | 546 | 601 | |||
Unity400 1 | 2018 | 120 | 6 | 10 | 42 | 420 | 462 | 3.9 PB |
250 | 6 | 21 | 42 | 882 | 970 | |||
Unity500 | 2018 | 100 | 6 | 9 | 42 | 378 | 416 | 7.8 PB |
200 | 6 | 18 | 42 | 756 | 832 | |||
400 | 6 | 36 | 42 | 1512 | 1663 | |||
500 | 6 | 36 | 42 | 1512 | 1663 | |||
Unity600 1 | 2018 | 100 | 6 | 9 | 42 | 378 | 416 | 9.7 PB |
200 | 6 | 18 | 42 | 756 | 832 | |||
400 | 6 | 36 | 42 | 1512 | 1663 | |||
500 | 6 | 45 | 42 | 1890 | 2079 | |||
1000 | 6 | 45 | 42 | 1890 | 2079 |