Dell PowerVault 221S Optimizing Dell SCSI Solutions - Page 7

A REFERENCE GUIDE FOR OPTIMIZING DELL™ SCSI SOLUTIONS VER A02 • RAID 10 - Recommended for enterprise mission critical e-mail servers where availability and redundancy and/or performance are the highest priority and reduce storage capacity is acceptable. • RAID 5 - Recommended for e-mail servers that require maximum storage capacity and only base data protection and performance. • RAID 50 - Recommended for those solutions that require greater redundancy and data protection and a balance between storage capacity and performance. Possible: • RAID 1 - Possible solution for small e-mail servers which do not require high storage capacity. Not recommended: • RAID 0, Concatenated - Not recommended due to lack of redundancy and data protection. Note: While these configurations are not recommended, they can be configured and utilized. Database Servers Database servers can range from simple workgroup databases like Microsoft® Access with a few hundred users to mission critical enterprise databases like Oracle or SQL Server with thousands of users. Database applications will always benefit from some data protection while other requirements such as performance and availability will vary. As a general rule, the more mission critical the database is, the more data protection is required. Additionally, the performance requirements increase relative to the number of users accessing the database. • Table 2-5: Database General IO profile I/O Profile I/O Profile (Read/Write) (Sequential/Random) Bandwidth 70/30 Random Heavy IO Size 8K Latency Sensitivity High Growth Rate High Criticality High • Table 2-6: Database sever RAID Guidelines Application Database Concatenated 0 Recommended RAID Level 1 10 Not Recommended 5 50 Possible Recommended: • RAID 10 - Recommended for enterprise mission critical database solutions where availability and redundancy and/or performance are the highest priority. PAGE 7 11/17/2005