A SearchStorage.com reader recently asked:
Am presenlty Testing the I/o performance on the new CX-500 San From Emc And Hba From Emulex,The LUn Size is 1 TB and when doing the Testing with SQlIO Tool with a I/o block size-8 i get 39.3 MB/sec for Random write requestes but when doing the same with Random Read requests i get 6.04 MB/sec as the output,the read/Write cache is enabled with read cache set to 288 and write to 1198,We have sqlserver Oltp Enviroment with mostlty Read Intensive Operations , iam wonering how can i increase the Read i/o ,The Lun design looks bad we should have made smaller Luns and Shared the Data and Log Files among them ,will i get any performance if i set read cache to low value or turn off the read cache or should i recomend to rebuild the san design to smaller chunks , i am not so well versed in san design , what i want is best perfromance for my sql serverr IO ,Pls Suggest
We Have Raid 10 On our San with 4D+4D Raid Group sets ,In this Situtation what is the best Setting For the Read Cache for our Hba Emulex(2GB)
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