**To describe valid modifications for a DB instance**
The following ``describe-valid-db-instance-modifications`` example retrieves details about the valid modifications for the specified DB instance. ::
aws rds describe-valid-db-instance-modifications \
--db-instance-identifier test-instance
Output::
{
"ValidDBInstanceModificationsMessage": {
"ValidProcessorFeatures": [],
"Storage": [
{
"StorageSize": [
{
"Step": 1,
"To": 20,
"From": 20
},
{
"Step": 1,
"To": 6144,
"From": 22
}
],
"ProvisionedIops": [
{
"Step": 1,
"To": 0,
"From": 0
}
],
"IopsToStorageRatio": [
{
"To": 0.0,
"From": 0.0
}
],
"StorageType": "gp2"
},
{
"StorageSize": [
{
"Step": 1,
"To": 6144,
"From": 100
}
],
"ProvisionedIops": [
{
"Step": 1,
"To": 40000,
"From": 1000
}
],
"IopsToStorageRatio": [
{
"To": 50.0,
"From": 1.0
}
],
"StorageType": "io1"
},
{
"StorageSize": [
{
"Step": 1,
"To": 20,
"From": 20
},
{
"Step": 1,
"To": 3072,
"From": 22
}
],
"ProvisionedIops": [
{
"Step": 1,
"To": 0,
"From": 0
}
],
"IopsToStorageRatio": [
{
"To": 0.0,
"From": 0.0
}
],
"StorageType": "magnetic"
}
]
}
}