Bug #40815 Data/undo files are when initialized written 32k at a time

Description:
When creating a datafile or a undofile
(or soon redo-file), the file is written 32k at a time.

This can give poor io-throughput

How to repeat:
create data/undo file(s)

Suggested fix:
improve write size

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/59046

2750 Jonas Oreland	2008-11-18
      ndb - bug#40815 - increase init-write-size to 512k

this patch increases to 512k

Pushed into 5.1.29-ndb-6.4.0  (revid:jonas@mysql.com-20081118102128-d2pqz3oz0b9rad96) (version source revid:jonas@mysql.com-20081118102803-7wuzv99dlrvsbv46) (pib:5)

Pushed into 5.1.29-ndb-6.3.19  (revid:jonas@mysql.com-20081118102128-d2pqz3oz0b9rad96) (version source revid:jonas@mysql.com-20081118102128-d2pqz3oz0b9rad96) (pib:5)

Documented bugfix in the NDB-6.3.19 changelog as follows:

        Redo logs, undo logs, and data files were created in 32K increments. 
        Now these files are created in 512K increments, resulting in shorter
        creation times.

redo are not affected
(yet... but might be if I push the SparseInitFragmentLogfiles)

Amended changelog entry per comment from Jonas. Closed.