Dell PowerVault MD1000 SAS Solution Manual

Dell PowerVault MD1000 SAS Solution Manual Manual pdf 25 page image

A REFERENCE GUIDE FOR OPTIMIZING DELL™ MD1000 SAS SOLUTIONS VER A00PAGE 25 5/06/2005SNMP TrapsThe architecture for handling SNMP traps and the Management Information Base (MIB) is differentin Server Administrator than in Array Manager. You may need to modify the applications that arecustomized to receive SNMP traps from Array Manager.Event NumberingThe numbering scheme for Storage Management alerts or events is different than the numbersused for the corresponding Array Manager events. See the Alert Messages chapter in the StorageManagement online help for more information.7. Storage Applications and ComponentsIdentify customer usage model and needsIn order to select the correct storage solution, it is important to understand the application and userrequirements. A good starting point is to use the following basic storage profiling considerations.Table 4: Storage Profiling ConsiderationsCharacteristic Values DescriptionPerformance • Bandwidth (MB persec.)• I/O size (KB/MB)• I/O Profile (read/writeand random/sequentialaccess mix)• LatencyPerformance is the overall ability of thesolution to read and write data to the disk.The performance requirements areusually determined by the type ofapplication being utilized. Differentapplications have different performancerequirements. For example, a database ore-mail server has mostly random diskaccess operations while a streamingmedia server would have mostlysequential disk access.StorageCapacityNeedsGigabytes Storage capacity is the amount of storagespace required by the application and userdata. For example, e-mail storage for 100users would require much less storagecapacity than an e-mail store for 1000users.StorageGrowth RatePercent increase per year Storage growth is the expected increasein the amount of the capacity that will berequired as the usage increases. This canbe estimated by forecasting the number ofusers or clients expected to access theapplication in the future.Criticality Low, Medium, High, VeryHighCriticality defines the impact to businessneeds if the storage is offline. Thischaracteristic is important for choosing theright RAID level.