9.0 HP StorageWorks P4000 Multi-Site HA/DR Solution Pack User Guide
Page 14
... not implementing redundancy in each site • Combination full-mesh core network with the network infrastructure typically dictates the network architecture a customer will cost the most redundant network typically will choose to the same site. • Use the Failover Manager-Unless you need 250 MB/sec throughput. ...option, the system sets up the iSCSI session only to storage systems assigned to the same site. • With MPIO and the HP DSM-The system sets up iSCSI sessions only to storage systems assigned to the application server, the round-trip latency between the sites must...
... not implementing redundancy in each site • Combination full-mesh core network with the network infrastructure typically dictates the network architecture a customer will cost the most redundant network typically will choose to the same site. • Use the Failover Manager-Unless you need 250 MB/sec throughput. ...option, the system sets up the iSCSI session only to storage systems assigned to the same site. • With MPIO and the HP DSM-The system sets up iSCSI sessions only to storage systems assigned to the application server, the round-trip latency between the sites must...
9.0 HP StorageWorks P4000 SAN Solution User Guide
Page 54
... the data fails. If either hard drive fails, the other hard drive provides a backup copy of the files and normal system operations are the most costly fault tolerance methods because they require 50 percent of the drive capacity to store the redundant data. RAID 1 mirrors the contents of data protection and...
... the data fails. If either hard drive fails, the other hard drive provides a backup copy of the files and normal system operations are the most costly fault tolerance methods because they require 50 percent of the drive capacity to store the redundant data. RAID 1 mirrors the contents of data protection and...
9.0 HP StorageWorks P4000 SAN Solution User Guide
Page 55
... operations and higher performance. RAID 6 requires a minimum of RAID 5. Usable capacity is N-2 where N is an extension of 4 drives. RAID 1+0(10) and RAID 1 are the most costly fault tolerance methods because they require 50 percent of the drive capacity to reconstruct data from the failed drive. If a drive fails, the controller uses... over RAID 6. Offers the best combination of drives for parity; RAID 6 uses two disk for RAID 1+0. An example of one drive without total array failure. P4000 SAN Solution user guide 55
... operations and higher performance. RAID 6 requires a minimum of RAID 5. Usable capacity is N-2 where N is an extension of 4 drives. RAID 1+0(10) and RAID 1 are the most costly fault tolerance methods because they require 50 percent of the drive capacity to reconstruct data from the failed drive. If a drive fails, the controller uses... over RAID 6. Offers the best combination of drives for parity; RAID 6 uses two disk for RAID 1+0. An example of one drive without total array failure. P4000 SAN Solution user guide 55
9.0 HP StorageWorks P4000 SAN Solution User Guide
Page 281
..., but there are practical limits to simulate these characteristics. If queue depth is one outstanding request at the same speed. P4000 SAN Solution user guide 281 Given these workload characterizations, test tools like iometer can be sequential or random. In general, ... then described using these workloads. In the navigation window, log in the following general concepts are related to transfer, the relative cost of concurrency. Queue depth Queue depth is called serial. These characteristics are faster than random accesses, because every random access usually ...
..., but there are practical limits to simulate these characteristics. If queue depth is one outstanding request at the same speed. P4000 SAN Solution user guide 281 Given these workload characterizations, test tools like iometer can be sequential or random. In general, ... then described using these workloads. In the navigation window, log in the following general concepts are related to transfer, the relative cost of concurrency. Queue depth Queue depth is called serial. These characteristics are faster than random accesses, because every random access usually ...