Installing and Configuring acache_client and hcache

Installing acache_client and hcache Using RPM

1. Obtain the RPM installation package (hcache included) and digital certificate of acache_client from Huawei technical support.

   Table 1 lists the default RPM installation files and paths.

   Table 1 Installation files and paths

   File	Description	Path
   acache_client	Smart prefetch framework	/usr/local/bin/
   bcache.conf	bcache configuration file	/etc/modprobe.d/
   acache_client.service	Configuration file required for using systemctl to start acache_client	/usr/lib/systemd/system/
   hcache_config.cfg	hcache configuration file	/usr/local/bin/
   libhcache.so.[Version number]	hcache library file	/usr/lib64/

2. After obtaining the installation package, verify its integrity and consistency for security purposes.

   Perform the verification:

   1. Obtain the software digital certificate and installation package. For details, see 1.
   2. Obtain the verification tool and method from the following link:

      https://support.huawei.com/enterprise/en/tool/pgp-verify-TL1000000054

   3. Verify the installation package integrity by following the procedure described in the OpenPGP Signature Verification Guide obtained in 2.
3. Start the installation.
   

   Use the root permission to start the installation.

   • If it is the initial installation, run the following command:

     rpm -ivh acache_client-x.x.x_x.x.x-1.el7.aarch64.rpm

   • If it is an upgrade, run the following command:

     rpm -U acache_client-x.x.x_x.x.x-1.el7.aarch64.rpm

   

   During the installation, if the message "package acache_client... is already installed" is displayed, continue the installation using either of the following methods:

   

   • Run the rpm -e acache_client command to uninstall the RPM package and then run the rpm -ivh command to install it.
   • Run the rpm -ivh acache_client-x.x.x_x.x.x-1.el7.aarch64.rpm -force command.

Configuring hcache

The smart prefetch algorithm hcache provides the initial configuration file hcache_config.cfg, which is stored in the same directory as acache_client by default, that is, /usr/local/bin. The algorithm reads the file as the initial parameter during the initial loading.

Table 2 describes the configuration items of hcache_config.cfg.

After the modification is complete, restart acache_client. For details, see Stopping the Smart Prefetch Engine and Starting the Smart Prefetch Engine.