Re: [PATCH] remove 2TB block device limit

Daniel Phillips (phillips@bonn-fries.net)
Fri, 17 May 2002 21:52:23 +0200

On Friday 17 May 2002 15:32, Jesse Pollard wrote:
> Note - most these really large filesystems allow the inode tables and
> bitmaps to be stored on disks with a relatively small blocksize (raid 5),
> and the data on different drives (striped) with a large block size (I believe
> ours is 64K to 128K sized data blocks, inode/bitmaps are 16K-32K.) This is
> done for two reasons:

Since we're on this subject, and you have experience with these large block
sizes, where exactly do you see the large savings?

- setup cost of the disk transfer?
- rotational latency of small transfers?
- setup cost of the network transfer?
- interrupt processing overhead?
- other?

-- 
Daniel
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