Enabling Block Storage

This section describes how to use the compression algorithm in block storage scenarios.

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ceph osd pool create vdbench 1024 1024
ceph osd pool set vdbench compression_algorithm glz
ceph osd pool set vdbench compression_mode force

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ceph osd pool set vdbench compression_required_ratio .99

Changing the compression algorithm level

• The compression algorithm supports two levels: 0 and 1. Level 0 indicates the high-performance mode, whereas level 1 indicates the high-compression mode.
• By default, compressor_glz_level is set to 0 on Ceph. If the high-performance mode is required, retain the default settings. If the high-compression mode is required, change the value to 1 based on 2.

1. Open the ceph.conf file.

   1	vi /etc/ceph/ceph.conf

2. Press i to enter the insert mode and set compressor_glz_level to 1.

   1	compressor_glz_level = 1

   

3. Press Esc to exit the insert mode. Type :wq! and press Enter to save the file and exit.
4. Restart the OSD for the modification to take effect.

   1	systemctl restart ceph-osd.target