The ADSTAR Distributed Storage Manager (now the Tivoli Storage
Manager) is a client/server system that provides backup and storage
archival functionality to customers in multi-vendor computer
environments. To improve the performance of the ADSM system this
paper describes experimental results for an ADSM production product
enhanced with a hardware based data compression system built of
commodity components. We demonstrate that threaded hardware compression
improves the performance of ADSM by 2X while reducing the CPU loading
by at least one-half, when using high bandwidth network
communications. Previously, the CPU load was at 100\% forcing the
user's client offline for backup purposes. The method described can
also be applied to multi-threading software data compression across
multiple CPUs in a shared or distributed memory parallel program
environment. Furthermore, this methodology can be applied to many
other compute intensive algorithms, such as data encryption, that
limit the performance of client/server systems.
By: Jian Yin(IBM Almaden), Mazin Yousif(IBM Research Triangle Park), Ronald Mraz
Published in: RC21808 in 2000
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