|The stupid question is the question not asked|
Comment onby gods
|on Feb 11, 2000 at 00:06 UTC||Need Help??|
Sounds like you're indexing your data by a hex-encoded digest?
Given that you have 3 variable & possible huge sized chunks -- which most RDBMSs handle by writing the filesystem anyway -- associated with each index key, and your selection criteria are both fixed & simple, I'd use the filesystem.
Subdivide the key into chunks that make individual directories contain at most a reasonable number of entries and then store the 3 sections in files at the deepest level.
By splitting a 32-byte hex digest into 4-char chunks, no directory has more than 256 entries. The file-system cache will cache the lower levels and the upper levels will be both fast to read from disk and quick to search. Especially if your file-system hashes its directory entries.
I'd write the individual chunks of the two text parts in separate files unless they will always be loaded as a single entity, in which case it might be slightly faster to concatenate them.
Overall, given a digest of 8fbe7eb8c04c744406cca0aeb67e4f7f, I'd lay the directory structure out like this:
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