RE: Filesystem Block Size ? 1K or 4K or 8K ?

Date: Tue, 14 Oct 2008 17:19:54 +0530
Message-ID: <>

Thanks V much Zhu

My Questions in-laid below preceded by Qs ->


From: []

If direct io is being used, the difference maybe less. Qs 1 -> What do you mean by "the difference maybe less."?

Anyway I don't see any benefit using 1k/4k blocksize. If you want best throughput, go with raw volumes.

Have done all tuning on hp kaio setup to maximize os capability? Qs 2 -> Could you share some "tuning on hp kaio setup" please?

HP who is partnering the Benchmark states - since Filesystems are being Mounted with Direct I/O therefore 1K F.S. block size is preferred to 8K.

From: [] Of course set to 8k

We are in the process of Setting up DB Server for an OLTP Banking Application Benchchmark.

HP-UX B.11.31
system device block size(think this is the O.S. block size) = 1K Base page size = 4K.
DB_block_size = 8K

Should the Filesystem (VXFS) Block Size be set to 1K, 4K or 8K? ... Personally I think it should be 4 K (i.e. Equal to the Page-size)

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Received on Tue Oct 14 2008 - 06:49:54 CDT

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