1. 

   SScurlock
   Member

   When I look at Show Cache Content for the two drives they have identical content. Is this showing what is on both when I click on one and hit "Show Cache Content"? Ram cache shows completely different files. I added the drives one at a time and bulit cache for the first before adding the second and building.

   Posted 2 years ago #
2. 

   mradr
   Member

   Your ram the fastest, so it's going to get the more propity caches while your USB ones will get the lesser of them. Not knowing how fast your USB are, eboostr could be "sharing" to help take the load off one USB by allowing programs to load from two places.

   Posted 2 years ago #
3. 

   SScurlock
   Member

   Got one pair on my first system running at 20052 KB/s and 20540 and the other system running at 20247 and 19454 KB/s.

   Posted 2 years ago #
4. 

   SScurlock
   Member

   Still curious about this. I just added a third 4GB Thumb Drive and ran the auto config. Extended memory is at 100% and each of the drives is showing 5% with the same content cached.

   I then removed each drive, manually deleted each cache,then uninstalled eboostr. Reloaded and started with the memory, rebuilt the individual cache after installing the drives one by one.

   Still ended up with 100% and three 5%. I am assuming that this means I do not need three thumb drives as I gain nothing from them.

   Any thoughts?

   Posted 2 years ago #
5. 

   Spathi
   Member

   Why don't you do an eboostr speed test with one, two and three drives. You could also do a read test on all the drives at once to test the USB2 bandwidth (not sure what software does this).

   I don't know how eboostr works, but at best eboostr collects stats and is load balancing using the fastest drive first, at worst it is querying all drives and using the first result... so in all cases you will want the cache on the USB's to contain identical copies of everything not in ram.

   If the USB controllers are not sharing bandwidth and assuming the thumb drives are 30-32MB/s already, then pure theory says you may get 60MB/s from two fast drives, and 90MB/s from 3 under heavy load (windows or the controller may just cap you at 30 or 60 though). It might also get past the System Reserved 10% bandwidth for one drive.

   There may be other side-effects of using lots of drives (like an unresponsive mouse), it probably depends on what sort of system you have.

   Posted 2 years ago #
6. 

   Spathi
   Member

   OK I did some tests on my crappy work PC b/c I just realise I have disparate thumb drives.. one is 90MB/s and one is 30MB/s.. so it may be interesting.

   Crappy Disk
   16MB/s

   eSATA Throttle (plugged into eSATA)
   85MB/s

   eSATA Throttle + Sandisk Cruzer
   71MB/s

   So it looks like it is faster to just pick the fastest drive if they differ by a lot. Mind you it may be different for 2xUSB or 3xUSB because you may have more bandwidth with extra drives in that case. So you still need to test.

   Posted 2 years ago #
7. 

   Whucares
   Beta Veteran

   I have the same setup (2x4gb fast sony sticks) and I'm not getting any decent performance gains.
   I need to check the content, though.

   Posted 2 years ago #

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