HP Integrity rx1620 Server 1.30 GHz Base System AB430A#0D1 전단
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AB430A#0D1
Evolution of storage
To reiterate, RDBMS technology was developed primarily to address business data which is
transactional and record oriented. Event data is different than relational data. RDBMS technology is
unable to adequately address the unique characteristics of event data, and attempts to force an
RDBMS solution on event data management often create significantly diminished performance and
increased storage requirements. Strategies aimed at smoothing over the wrinkles simply produce even
increased storage requirements. Strategies aimed at smoothing over the wrinkles simply produce even
more issues.
There is a clear need for an event storage technology that overcomes RDBMS shortfalls and leverages
There is a clear need for an event storage technology that overcomes RDBMS shortfalls and leverages
the unique characteristics of event data. This technology is not intended to compete across the board
with RDBMS technology, but instead follows recent trends of purpose-built storage solutions. As such,
with RDBMS technology, but instead follows recent trends of purpose-built storage solutions. As such,
it reflects the advantages of the third-generation storage-systems technology.
First generation: Direct attached storage
First generation architectures—direct attached storage (DAS)—consisted of a hard disk attached directly to
First generation architectures—direct attached storage (DAS)—consisted of a hard disk attached directly to
a computer, with storage controlled by a computer’s CPU. Today, greater that 95 percent of all computer
storage devices (disk drives, disk arrays, and RAID systems) are directly attached to a computer through
storage devices (disk drives, disk arrays, and RAID systems) are directly attached to a computer through
various adapters—through standardized software protocols such as SCSI, Fiber Channel, and others. This
type of storage is alternatively called ‘captive storage’ or ‘server attached storage’.
Second generation: Storage architectures
As architectures evolved, new ones began utilizing a combination of computers, networks, and DAS
As architectures evolved, new ones began utilizing a combination of computers, networks, and DAS
that essentially provide virtual DAS for client computers.
Third generation: Data-type-specific storage architectures
Third generation storage architectures are similar to generic data storage architectures, but are specifically
Third generation storage architectures are similar to generic data storage architectures, but are specifically
designed to manage the unique characteristics of the type of data stored, such as event data.
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