Figure 11 shows the space savings on the operating system and the extra savings on the PowerStore appliance.
Blue column: Represents the space reduction on the operating system level
Yellow column: Represents the additional reduction saving on the PowerStore appliance
Without MongoDB compression enabled, the total file system space consumed by all three replica set members would be around 1 TB including the operating system. It is represented as 0% savings on the operating system. However, the actual physical space consumed on the PowerStore appliance is much less than 1 TB. PowerStore alone reduced the total physical space consumption by 34%.
With the snappy compression, which is the default in MongoDB, an 8% reduction is realized on the file system. However, PowerStore provided an additional 30% reduction savings.
Both zlib and zstd compression algorithms do a better job of saving space on the file system with 35% reduction. It is worth noting that even with the more efficient compression algorithms like zstd and zlib, PowerStore can further reduce the total physical space consumption by 11% and 12% respectively.
Note: The amount of reduction varies depending on the type of data.