yugi

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About yugi

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  1. Sure, What I am looking here is do basic testing to identify the maximum performance I can obtain. I can give you an simple example of the current configuration i am trying to test it with but i need not stick with this i can have a parallel file system like GPFS with different pagepoool sizes. How ever I first want to have a basic understanding of these concepts which would help me understand what i am looking at. 60 drive Storage system (HDD-10K-1TB SAS drives) XFS with default settings File system Block size 1MB Segment size 128KB (on storage system settings) RAID 6 with 28 +2 drives (2 volumes) Cache Mirroring Enabled and Disabled Test Server Information : 12 Cores per server (2 servers) 32GB per server The test work load : (IOZONE test) Test Chunk sizes 1M, 2M, 4M , 8M Test Threads 12, 24, 48 (Threads) File size 10GB (per thread ) I am out of cache on this as each thread does 10 GB so if I am doing a 12 threads then we get 120 GB file size.
  2. Hi , I am new to storage area I am testing some storage systems but am trying to understand the concepts. I am using IOzone to test the system I have multiple pare maters on the storage side swell as test side which I can alter how ever i am trying to understand and align the parameters for some reasonable (expected) performance results OK now while I am testing this storage system I am trying to understand these concepts here: Filesystem and Storage Settings: What is Segment size? What is Stripe size ? What is File system Block Size? Test Settings: What is Chunk Size? How do I align all these parameters in a 60 disk storage system with what RAID 6? How many disks should I have in each volume? If any one have best practices to test storage systems please point me or guide me in that direction. Is there a different testing tool i should be using ?