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`ACID properties of transactions
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`ACID properties of transactions
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`Welcome
`Developer Trial and Value Unit Edition
`Continuous delivery in CICS
`What's new?
`What documentation is available?
`Product overview
`CICS applications
`Transaction processing
`ACID properties of transactions
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`https://www.ibm.com/support/knowledgecenter/en/SSGMCP_5.4.0/product-overview/acid.html
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`Sound View Innovations, LLC, Exhibit 2002
`Page 2002 - 1
`IPR2019-01113, Unified Patents Inc v. Sound View Innovations, LLC
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`
`
`8/31/2019
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`p g pp
`Configuring
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`ACID properties of transactions
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`In the context of transaction processing, the acronym ACID refers to the four key properties of
`a transaction: atomicity, consistency, isolation, and durability.
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`Atomicity
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`All changes to data are performed as if they are a single operation. That is, all the
`changes are performed, or none of them are.
`For example, in an application that transfers funds from one account to another, the
`atomicity property ensures that, if a debit is made successfully from one account,
`the corresponding credit is made to the other account.
`Consistency
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`Data is in a consistent state when a transaction starts and when it ends.
`For example, in an application that transfers funds from one account to another, the
`consistency property ensures that the total value of funds in both the accounts is the
`same at the start and end of each transaction.
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`Isolation
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`The intermediate state of a transaction is invisible to other transactions. As a result,
`transactions that run concurrently appear to be serialized.
`For example, in an application that transfers funds from one account to another, the
`isolation property ensures that another transaction sees the transferred funds in one
`account or the other, but not in both, nor in neither.
`Durability
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`After a transaction successfully completes, changes to data persist and are not
`undone, even in the event of a system failure.
`For example, in an application that transfers funds from one account to another, the
`durability property ensures that the changes made to each account will not be
`reversed.
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`https://www.ibm.com/support/knowledgecenter/en/SSGMCP_5.4.0/product-overview/acid.html
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`2/3
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`Sound View Innovations, LLC, Exhibit 2002
`Page 2002 - 2
`IPR2019-01113, Unified Patents Inc v. Sound View Innovations, LLC
`
`
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`ACID properties of transactions
`8/31/2019
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`https://www.ibm.com/support/knowledgecenter/en/SSGMCP_5.4.0/product-overview/acid.html
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`3/3
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`Sound View Innovations, LLC, Exhibit 2002
`Page 2002 - 3
`IPR2019-01113, Unified Patents Inc v. Sound View Innovations, LLC
`
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