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# Descripción de los precios y las métricas de Amazon EMR WAL
| Unidad de facturación de características principales | Details |
| --- | --- |
| EMR-WAL-Read-GiB | API calls to read data from your table are billed as ReadRequestGiB. This includes [`Get` and `Scan`](https://hbase.apache.org/book.html#_data_model_operations) operations. Reads are charged based on the sizes of the read items. Amazon EMR bills at a minimum of 1 byte. For example, if you read a 1234.12 bytes item, you're charged for 1235 bytes. Reads are aggregated every hour for billing and shown as GiBs. |
| EMR-WAL-Write-GiB | API calls to write data from your table are billed as Write-GiB. This includes [https://hbase.apache.org/book.html#_data_model_operations](https://hbase.apache.org/book.html#_data_model_operations) operations. Writes are charged based on the sizes of the written items. Amazon EMR bills at a minimum of 1 byte. For example, if you write a 1234.12 bytes item, you're charged for 1235 bytes. Writes are aggregated every hour for billing and shown as GiBs. |
| EMR-WAL-WALHours | El número WALs que almacenas en el servicio se factura como. `EMR-WAL-WALHours` Amazon EMR crea una WAL por región. HBase Por ejemplo, si crea 20 HBase tablas, incluidas las tablas del sistema, y cada tabla tiene dos HBase regiones, utilizará 28 800 horas de WAL, calculadas de la siguiente manera: 20 tables
x 2 Regions per table
x 1 WAL per Region
x 30 days
x 24 hours
-----------
28,800 EMR-WAL-WALHours
|
**Ejemplo: `EMRWALCount`**
**Ejemplo: `EMRWALWorkspaceCount`**
