Difference in used space: MyISAM vs ndbcluster.

[Anton Aleksandrov]

Hi,
I have problem with migrating from myISAM to ndbcluster. MyISAM shows that database (including indexes) takes about 3906Mb. With idea that database will grow we bought 8 boxes with 2Gb of RAM on each. In config I have these values:

[NDBD DEFAULT]
NoOfReplicas=2
DataMemory=1750MB
IndexMemory=200Mb
MaxNoOfAttributes=15000
MaxNoOfOrderedIndexes=15000
MaxNoOfUniqueHashIndexes=10000
MaxNoOfConcurrentOperations=100000
RedoBuffer=64Mb
TimeBetweenLocalCheckpoints=13
NoOfFragmentLogFiles=150

After importing data to cluster almost all this space is used, "all dump 1000" says:
Data usage is 97%(54776 32K pages of total 56000)

My simple calculations give me such thing:
(54776 * 32) / 1024 / 1024 = 1.67Gb. That's the state on each node. I have 8 boxes and 2 replicas - so it will (1.67 * 8) / 2 = 6.68Gb. So my database running as MyISAM grew almost double? Neither me, neither my boss expect such results.

My question is simple - is it normal or not? Do I have something wrong in my config or calculations?

Any ideas/suggestions are very kindly and warmly welcomed!