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

Date: Thu, 16 Oct 2008 12:17:44 +0530
Message-ID: <>

Thanks Folks for the support

MWF wrote -> Unless your underlying physical media is ssd, flash, or those fancy new 4K sector drives, it is likely whatever you are looking at is assembled from 512 byte "sectors."

HP who co-anchor this benchmark gave the following:- 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
This seemingly indicates an O.S. Block size of 1K though I have never before heard of such a size... usually knew O.S. Block size to be 512 Bytes (1/2 KB).

MWF wrote -> Greg bases his opinions on measured facts, and if you have some facts about your choice I would also like to hear them. That is not a slap, but a genuine question.

My Reasons for preferring Mounted F.S. over ASM in a NON-RAc scenario are mostly the same as given by Jared:-

  • F.S. are a Comfort zone & I have historically & traditionally used them for a while.
  • Additional instance for ASM
  • file management is simpler
  • storage admins have easy direct access to see what's on disk.



  • CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***
Received on Thu Oct 16 2008 - 01:47:44 CDT

Original text of this message