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O_HOT and O_COLDO_HOT and O_COLDPosted Apr 26, 2012 19:35 UTC (Thu) by ejr (subscriber, #51652)In reply to: O_HOT and O_COLD by neilbrown Parent article: O_HOT and O_COLD
And then a unionfs binding of /hot and /cold, along with userspace tools based on common machine learning techniques that manage /hot and /cold.
The question becomes what are the sufficient statistics necessary for control of what file goes where, and how (and how often) does the kernel update those statistics. While that *could* be handled at user level, intercepting open/close/read/write calls is kludgy and inefficient. IMHO, gathering the right statistics is where the kernel can help.
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