RE: Filesystem Block Size ? 1K or 4K or 8K ?
- From: VIVEK_SHARMA <VIVEK_SHARMA@xxxxxxxxxxx>
- To: "zhuchao@xxxxxxxxx" <zhuchao@xxxxxxxxx>
- Date: Tue, 14 Oct 2008 17:19:54 +0530
Thanks V much Zhu
My Questions in-laid below preceded by Qs ->
Cheers
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From: zhuchao@xxxxxxxxx [mailto:zhuchao@xxxxxxxxx]
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?
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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: zhuchao@xxxxxxxxx [mailto:zhuchao@xxxxxxxxx]
Of course set to 8k
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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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