2.4 Data access

The following are the types of cache data operations that are available:

Data update operations

• put (storing data)

• create (storing new data)

• update (updating data)

• replace (replacing data)

• remove (deleting data)

Data reference operation

• get (acquiring data)

Depending on the type of data operation, you can perform batch operations on multiple data items in a cache.

You can use API functions and commands to manipulate data in a cache. The following table shows the use of the API functions and the commands for data operations.

Table 2‒2: Use of the API functions and commands for data operations

Data operation	API function	Command
Data update operations	put create update replace remove	eztool put command eztool remove command
Data update operations (batch operation)	putAll removeAll	eztool removeall command
Data reference operation	get	eztool get command
Data reference operation (batch operation)	getAll	There is no applicable command.

Important note

In terms of the data types and sizes that can be specified, there is not complete compatibility between the API functions and the commands.

Differences in data update operations

The data update operation you can perform depends on whether you use an API function (put, create, update, replace, putAll) or the eztool put command. The following table shows the data operations supported by the API functions and the command:

API function or command	Storing new data	Updating existing data
Put put All eztool put command	Y	Y
create	Y	N
update	N	Y
replace	N	Y#

Legend:

Y: Can be executed.

N: Cannot be executed.

#

Replaces only values that match the specified values.

Organization of this section

• 2.4.1 Storing data (using put)

• 2.4.2 Storing new data (using create)

• 2.4.3 Updating data (using update)

• 2.4.4 Replacing data (using replace)

• 2.4.5 Acquiring data (using get)

• 2.4.6 Deleting data (remove)

• 2.4.7 Performing batch operations on a cache

• 2.4.8 Data access without having to be aware of the locations of individual EADS servers

• 2.4.9 General procedure for data access

• 2.4.10 Locking during data access

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