On Thu, 30 Aug 2012 23:34:49 +0200
Martin Steigerwald [off-list ref] wrote:

I wanted to ask about 32k either.

I used 32k on one 2,5 inch external esata disk. But I never measured 
anything so far.

I wonder what a good value for SSD might be. I tend to not use anymore 
than 16k, but thats just some gut feeling right now. Nothing based on a 
well-founded explaination.

If you look closely at https://oss.oracle.com/~mason/blocksizes/ , you will
notice that 16K delivers almost all of the 32K's performance gains in "Read",
while not suffering from slowdowns that 32K shows in "Create" and "Delete".

I have chosen 16K for my new /home partition (on an SSD+HDD mdadm RAID1).
But what disappointed me at the time, is that one can't seem to have a "mixed"
allocation FS with non-default leaf/node sizes.

-- 
With respect,
Roman

~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Stallman had a printer,
with code he could not see.
So he began to tinker,
and set the software free."