I was looking at Fastpath's benchmarks from the LSI product brief and the following were the Virtual drive settings for the tests:
Write policy: Write Through
I/O policy: Direct IO
Read policy: No Read Ahead
Disk Cache: Enabled
Looking at the MegaRAID user guide it seems these settings pass requests to the SSDs directly, bypassing the cache memory on the card. Is my understanding correct?
Does that mean a BBU or Cachevault isn't needed if using Fastpath as nothing is stored to the cache memory?
Write policy: Write Through
I/O policy: Direct IO
Read policy: No Read Ahead
Disk Cache: Enabled
Looking at the MegaRAID user guide it seems these settings pass requests to the SSDs directly, bypassing the cache memory on the card. Is my understanding correct?
Does that mean a BBU or Cachevault isn't needed if using Fastpath as nothing is stored to the cache memory?