Batch Put Attributes
simpledb_batch_put_attributes | R Documentation |
The BatchPutAttributes operation creates or replaces attributes within one or more items¶
Description¶
The batch_put_attributes
operation creates or replaces attributes
within one or more items. By using this operation, the client can
perform multiple PutAttribute operation with a single call. This helps
yield savings in round trips and latencies, enabling Amazon SimpleDB to
optimize requests and generally produce better throughput.
The client may specify the item name with the Item.X.ItemName
parameter. The client may specify new attributes using a combination of
the Item.X.Attribute.Y.Name
and Item.X.Attribute.Y.Value
parameters.
The client may specify the first attribute for the first item using the
parameters Item.0.Attribute.0.Name
and Item.0.Attribute.0.Value
, and
for the second attribute for the first item by the parameters
Item.0.Attribute.1.Name
and Item.0.Attribute.1.Value
, and so on.
Attributes are uniquely identified within an item by their name/value
combination. For example, a single item can have the attributes
{ "first_name", "first_value" }
and
{ "first_name", "second_value" }
. However, it cannot have two
attribute instances where both the Item.X.Attribute.Y.Name
and
Item.X.Attribute.Y.Value
are the same.
Optionally, the requester can supply the Replace
parameter for each
individual value. Setting this value to true
will cause the new
attribute values to replace the existing attribute values. For example,
if an item I
has the attributes { 'a', '1' }, { 'b', '2'}
and
{ 'b', '3' }
and the requester does a BatchPutAttributes of
{'I', 'b', '4' }
with the Replace parameter set to true, the final
attributes of the item will be { 'a', '1' }
and { 'b', '4' }
,
replacing the previous values of the 'b' attribute with the new value.
You cannot specify an empty string as an item or as an attribute name.
The batch_put_attributes
operation succeeds or fails in its entirety.
There are no partial puts.
This operation is vulnerable to exceeding the maximum URL size when
making a REST request using the HTTP GET method. This operation does not
support conditions using Expected.X.Name
, Expected.X.Value
, or
Expected.X.Exists
.
You can execute multiple batch_put_attributes
operations and other
operations in parallel. However, large numbers of concurrent
batch_put_attributes
calls can result in Service Unavailable (503)
responses.
The following limitations are enforced for this operation:
-
256 attribute name-value pairs per item
-
1 MB request size
-
1 billion attributes per domain
-
10 GB of total user data storage per domain
-
25 item limit per
batch_put_attributes
operation
Usage¶
Arguments¶
DomainName
[required] The name of the domain in which the attributes are being stored.
Items
[required] A list of items on which to perform the operation.
Value¶
An empty list.