Hitachi Dynamic Provisioning 'provides data in pages'
02 May 2008
Hitachi Data Systems' provisioning solution can help to improve the allocation of unused storage capacity by distributing disk space in pages, it has been claimed.
Chief technical officer Hu Yoshida explains that Hitachi Dynamic Provisioning allocates virtual server space in pages of 42 MB each, rather than requiring each individual to be given their own area on a physical disk.
When an individual's data is recovered from the network, only the used space is transferred, he adds, rather than the entire volume - including empty space - being retrieved.
Mr Yoshida writes: "We provision 42 MB pages of virtualised storage as a user actually writes to his allocated storage space - when he exceeds his 42 MB page, we give him more pages until he reaches his maximum allocation."
As well as reducing the amount of data retrieved when a volume is requested from the network, this means the empty space may be pooled between all users instead of being allocated to individuals.
The company was recently identified by industry publication TheInfoPro as being the leading provider of block-level virtualisation for storage networks.
For further information on Hitachi Data Systems, please click here.
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