Why Does deduplication and Compression Affect Performance?

The impact of deduplication on performance is reflected in the I/O process. Compared with the non-deduplication process, the deduplication process has one more forwarding and metadata operations. Second, deduplication effectively reduces the number of disks (deduplication ratio is greater than 1:1). However, for deduplication data, the system compares the data word by byte to ensure that the data is duplicate, which brings extra KV core computing resource consumption. In addition, deduplication affects the volume of disks, which affects the garbage volume. Therefore, the impact on the recycling performance needs to be considered.