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Old 02-21-2014, 08:40 PM   #3
Adoby
Handy Elephant
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Posts: 1,044
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Join Date: Dec 2009
Location: Southern Sweden, far out in the quiet woods
Device: Ubuntu Linux, Cybook Opus, Motorola Xoom with Mantano Premium
Move the calibre library to SSD.

But don't expect too much...

I have a pretty sweet setup with a hybrid filesystem using bcache in Ubuntu 13.10 with 200 GB SATA 3 SSD write-back cache for two 3TB 7200RPM SATA 3 harddrives. So the entire library can be cached on SSD at once. It is a relatively new setup, I am still tweaking it. I may test to move the metadata.db - files to pure SSD.

While I copy 100 books to another large library, on the same partition, the CPU-usage by calibre is 6-7% on average (8 core AMD Bulldozer) and the CPU never even clocks up to full speed. If I copy to a new and empty library even less, around 4% CPU-usage.

But it still takes close to 5 minutes to copy 100 books. (3 custom text columns, no calculated columns, several virtual libraries, if that matter). If I copy to a new empty library it is one or two minutes faster.

If I copy the folder with the library with 100 books to another place using the filemanager, it is instantaneous. It is only around 40MB after all. So I assume that it is all the database updating and creation of folders and so on, that takes time?

Edit: I tested with both source and destionation metadata.db on pure SSD. It was a little faster, around 2 1/2 minutes. Not enough for me to bother. It is fast enough as it is...

Last edited by Adoby; 02-21-2014 at 09:21 PM.
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