Configuring HBase Parameters

The operations described in this section apply only to clusters of versions earlier than MRS 3.x.

If the default parameter settings of the MRS service cannot meet your requirements, you can modify the parameter settings as required.

1. Log in to the service page.

   For versions earlier than MRS 2.0.1, log in to and choose Services.

   For MRS 2.0.1 or later, click the cluster name on the MRS console and choose Components.

2. Choose HBase > Service Configuration and switch Basic to All. On the displayed HBase configuration page, modify parameter settings.

   Table 1 HBase parameters

   Parameter	Description	Value
   hbase.regionserver.hfile.durable.sync	Whether to enable the HFile durability to make data persistence on disks. If this parameter is set to true, HBase performance is affected because each HFile is synchronized to disks by hadoop fsync when being written to HBase. This parameter exists only in MRS 1.9.2 or earlier.	Possible values are as follows: true false The default value is true.
   hbase.regionserver.wal.durable.sync	Specifies whether to enable WAL file durability to make the WAL data persistence on disks. If this parameter is set to true, HBase performance is affected because each edited WAL file is synchronized to disks by hadoop fsync when being written to HBase. This parameter exists only in MRS 1.9.2 or earlier.	Possible values are as follows: true false The default value is true.