| Hello, Most recently when looking at PG’s folder splitting, I found that there was only one sub folder in the top 3 / 4 levels and start having 16 sub folders starting from level 6, what is the design consideration behind this? For example, if the PG root folder is ‘3.1905_head’, in the first level, it only has one sub folder ‘DIR_5’ and then one sub folder ‘DIR_0’, and then ‘DIR_9’, under which there are two sub folders ‘DIR_1’ and ‘DIR_9’, starting from which, the next level has 16 sub folders. If we start splitting into 16 sub folders in the very first level, we may potential gain better performance with less dentry lookup (though most likely the root level been cached). Thanks, Guang |
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