Jiawei, you may want to have a look at section 20.3.2 in the operations manual, it discusses how to size an MDT.
From what I understand, a 100GB MDT is more than enough for your ~200.000 files.
I think the max MDT size is 8TB. HTH, Arne Jiawei Zhao wrote:
Hi All,I am wondering if there is some guild lines for MDT disk size. We plan to build a rather small luster cluster with about 200TB disk space, served by about 20 OSS with about 40 (or more) OSTs. The file sizes stored on it will be around 1GB in average. Will a MDT disk with 100 - 200 GB size big enough for it? What is the biggest MDT disk size allowed?Best Regards, Jiawei
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