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# Memahami harga dan metrik Amazon EMR WAL
| Unit penagihan fitur inti | Detail |
| --- | --- |
| 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 | Jumlah WALs yang Anda simpan di layanan ditagih sebagai`EMR-WAL-WALHours`. Amazon EMR menciptakan satu WAL per Wilayah. HBase Misalnya, jika Anda membuat 20 HBase tabel termasuk tabel sistem, dan setiap tabel memiliki dua HBase Wilayah, maka Anda menggunakan 28.800 WAL jam, dihitung sebagai: 20 tables
x 2 Regions per table
x 1 WAL per Region
x 30 days
x 24 hours
-----------
28,800 EMR-WAL-WALHours
|
**Contoh`EMRWALCount`:**
**Contoh`EMRWALWorkspaceCount`:**
