IBM is building new storage-compression technology into its forthcoming "Viper" DB2 database server that it says can cut
storage needs by more than half.
The technology, code-named "Venom," allows database administrators to compress rows in database tables by scanning tables
for repetitive, duplicate data in rows and building dictionaries that assign short, numeric keys to those repetitive entries.
According to IBM, this compression can provide disk, I/O and memory savings, and beta testers of the technology have been
able to reduce storage needs by more than 50 percent.
With Viper, set to ship this summer, administrators will have the option to use the compression technology on a table-by-table
basis, as not all applications benefit equally from the technology, IBM said. The company will provide tools to allow administrators
to estimate potential savings before building dictionaries.
"Transactional applications don't see as much benefit, but query applications -- where you spend more time looking at information
and asking questions -- tend to find more benefit," said Jeff Jones, director of strategy for information management software
at IBM, in Armonk, New York.
IBM developed Venom from hardware-assisted compression technologies the company had built for DB2 running on the mainframe,
he said.
"From that we gained a lot of experience with compression algorithms and the science of compression," Jones said.
IBM also is building other storage-management capabilities into Viper that will allow database tables to draw automatically
from a pool of storage, so that administrators don't have to manage storage at the table level.
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