Dell PowerVault MD1000 SAS Solution Manual

Dell PowerVault MD1000 SAS Solution Manual Manual pdf 30 page image

A REFERENCE GUIDE FOR OPTIMIZING DELL™ MD1000 SAS SOLUTIONS VER A00PAGE 30 5/06/2005Table 11: OLTP RAID GuidelinesRAID LevelApplication Concatenated 0 1 10 5 50OLTPRecommended Not Recommended PossibleRecommended:• RAID 10 – Since OLTP systems are critical for most business, this RAID configuration ishighly recommended due to the high availability and redundancy and good performance.• RAID 5 – Recommended for OLTP servers that require maximum storage capacity andmoderate data protection and performance.• RAID 50 – Recommended for those solutions that require a balance between storagecapacity and performance.Possible:• RAID 1 – Possible solution for situations which do not require high storage capacity.Not recommended:• RAID 0, Concatenated - These are not recommended due to lack of redundancy and dataprotection.Note: While these configurations are not recommended, they can be configured and utilizedFile ServersFile servers can be used for file archival or more dynamic storage where files are changed, addedand deleted on a daily basis. These servers range from workgroup to the corporate level. Storagecapacity is a key attribute of these servers as users add more and more files. File servers aregenerally not mission critical systems so lower levels of availability and redundancy are acceptableas data is usually backed up and can be restored in a matter of hours.Archival file server characteristics and recommendations:Table 12: Archival File Server General I/O profileI/O Profile(Read/Write)I/O Profile(Sequential/Random) Bandwidth I/OSizeLatencySensitivityGrowth Rate Criticality90/10 Sequential Moderate >64k High Varies Low