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Size Can Matter: Ramdisk Journal Metadata Performance - Part 2

In a previous article we took a look at metadata performance and found that regardless of whether the journal was on a separate disk or a ramdisk performance was almost the same. However, the size of the journal was very small compared to the size of the file system (0.0032%) perhaps impacting performance.

The article linked above was all about metadata performance using Ext4 with a journal device on a separate disk. The key variable in the quest for ultimate performance, the journal size, was varied for a fixed file system size. Metadata performance was measured using the fdtree benchmark which has been used in a number of our previous metadata-focused articles...

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