Compaq ProLiant 1000 Compaq Backup and Recovery for Microsoft SQL Server 6.X - Page 55

Network Layout: Backup of 4 Servers Across 1 Shared 100Base-T Segment

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Compaq Backup and Recovery for Microsoft SQL Server 6.x Page 55 storage server is to avoid creating a serialization point at the storage server's network interface while it processes incoming requests from multiple sources75. The network layout is shown in Figure 2. Figure 2 - Network Layout: Backup of 4 Servers Across 1 Shared 100Base-T Segment The storage server dedicated a tape drive group for each concurrent backup job using the ARCserve Manager, and the RAID Option was used to stripe the drives in each group. RAID-0 arrays of 2 drives each were configured for each concurrent backup job up to 4 jobs, and RAID-5 arrays of 3 drives were configured for up to 2 jobs. More than 2 RAID-5 arrays could not be configured as ARCserve supports only 8 drives and each RAID-5 array requires at least 3 drives. With this setup, backup jobs were initiated simultaneously on from 2 to 4 database servers. The below chart shows the throughput results, average CPU and PCI bus76 usages on the tape server, and the average utilization of the network: 75 Slower performance was observed when using only a single NIC on the storage server to receive data from up to 4 other servers. 76 The PCI % usage shown in the chart was taken as an average of the load observed between the 2 peer-buses. 1997 Compaq Computer Corporation, All Rights Reserved Doc No 444A/0797

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Compaq Backup and Recovery for Microsoft SQL Server 6.x
Page
55
1997 Compaq Computer Corporation, All Rights Reserved
Doc No 444A/0797
storage server is to avoid creating a serialization point at the storage server’s network interface while it
processes incoming requests from multiple sources
75
.
The network layout is shown in Figure 2.
Figure 2 – Network Layout: Backup of 4 Servers Across 1 Shared 100Base-T Segment
The storage server dedicated a tape drive group for each concurrent backup job using the ARCserve
Manager, and the RAID Option was used to stripe the drives in each group.
RAID-0 arrays of 2 drives
each were configured for each concurrent backup job up to 4 jobs, and RAID-5 arrays of 3 drives were
configured for up to 2 jobs.
More than 2 RAID-5 arrays could not be configured as ARCserve supports
only 8 drives and each RAID-5 array requires at least 3 drives. With this setup, backup jobs were
initiated simultaneously on from 2 to 4 database servers.
The below chart shows the throughput results,
average CPU and PCI bus
76
usages on the tape server, and the average utilization of the network:
75
Slower performance was observed when using only a single NIC on the storage server to receive data from up
to 4 other servers.
76
The PCI % usage shown in the chart was taken as an average of the load observed between the 2 peer-buses.